Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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    Geen goed alternatief voor doden haantjes
    Gremmen, H.G.J. - \ 2018
    animal welfare - animal production - poultry - hens - animal ethics - animal health
    Microorganism-mediated behaviour of malaria mosquitoes
    Busula, Annette O. - \ 2017
    Wageningen University. Promotor(en): W. Takken, co-promotor(en): J. de Boer. - Wageningen : Wageningen University - ISBN 9789463431156 - 199
    culicidae - anopheles gambiae - anopheles arabiensis - mosquito-borne diseases - disease vectors - animal behaviour - host-seeking behaviour - plasmodium falciparum - hosts - man - cows - hens - odours - culicidae - anopheles gambiae - anopheles arabiensis - ziekten overgebracht door muskieten - vectoren, ziekten - diergedrag - gedrag bij zoeken van een gastheer - plasmodium falciparum - gastheren (dieren, mensen, planten) - mens - koeien - hennen - geurstoffen

    Host-seeking is an important component of mosquito vectorial capacity on which the success of the other behavioural determinants depends. Blood-seeking mosquitoes are mainly guided by chemical cues released by their blood hosts. This thesis describes results of a study that determined the effect of microorganisms – host skin bacteria as well as malaria parasites – on host-seeking behaviour of female Anopheles gambiae sensu stricto and An. arabiensis in Homabay county, western Kenya. Semi-field and field experiments were conducted to determine the response of mosquitoes with different host preference to synthetic and natural odour blends from three vertebrate hosts, a human, a cow and a chicken. Screen house experiments were conducted to test whether specific skin bacteria or a mix of skin bacterial volatiles from the three vertebrate hosts mediate mosquito response. A review chapter in this thesis discusses how malaria parasites can manipulate human hosts to enhance their own transmission, by making the hosts more attractive to mosquitoes. Another experiment, using a dual-choice olfactometer, determined whether infection with malaria parasites increases human attractiveness to malaria mosquitoes, and whether the attractiveness of infected humans is Plasmodium falciparum-stage specific. Here, the same children participated in the study during infection with malaria parasites and after treatment with antimalarial drugs, artemisinin lumefantrine. Cage assays were further used to test mechanisms of attractiveness of P. falciparum-infected individuals using body odours or skin bacterial volatiles collected from the children at the two time points. Overall results show that skin bacterial volatiles play an important role in guiding mosquitoes with different host preferences to their specific host. For An. gambiae s.s., high (microscopic) densities of P. falciparum gametocytes (and not parasite-free, submicroscopic gametocytes or asexual stages of Plasmodium parasites) results into higher attractiveness of hosts, and body odours play a role in attractiveness of P. falciparum-infected humans. The results may help to develop more effective health policies and enable targeted interventions towards the most attractive hosts, which could contribute to reductions in malaria transmission. Identification of general or common attractive volatiles produced by the natural hosts as well as those from the gametocyte carriers may contribute to the development of an improved synthetic odour blend that may be used for sampling of mosquitoes with different host preferences. The use of powerful attractive odorants may result in reductions of vector-borne diseases transmitted by mosquitoes.

    Uitloopkip lekkerder dan stalkip
    Rodenburg, Bas - \ 2017
    animal welfare - animal production - poultry - hens - animal housing

    Vleeskuikens die overdag kunnen scharrelen in een wilgenbosje zijn lekkerder en sappiger dan kippen die op stal blijven. Dat concludeert een team van Vlaamse en Wageningse onderzoekers

    Advancing Integrated Pest Management for Dermanyssus gallinae in laying hen facilities
    Mul, Monique F. - \ 2017
    Wageningen University. Promotor(en): Peter Groot Koerkamp; Marcel Dicke, co-promotor(en): Bastiaan Meerburg; D.R. George. - Wageningen : Wageningen University - ISBN 9789463430036 - 194
    hens - integrated pest management - dermanyssus gallinae - chicken housing - poultry housing - cages - animal production - poultry - animal health - hennen - geïntegreerde plagenbestrijding - dermanyssus gallinae - huisvesting van kippen - pluimveehokken - kooien - dierlijke productie - pluimvee - diergezondheid

    Pest and diseases in agricultural systems reduce the yield and quality of available food and feed worldwide. To meet the global growing demand for these products, losses should be reduced, preferably in a sustainable way. Integrated Pest Management (IPM) is a sustainable method that aims to minimize economic losses due to pests and diseases. IPM is generally based on eight steps: 1) prevention, 2) monitoring, 3) Decision‐making based on monitoring and thresholds, 4) use of non‐chemical methods, 5) pesticide selection, 6) reduced pesticide use, 7) anti‐resistance strategies, and 8) evaluation. With these steps, it is possible to prevent and control pests and diseases whilst deploying pesticides only as a last resort, thus reducing issues with pesticide contamination and resistance. Implementation of IPM by farmers increases when it is clear that it is compatible with existing farm processes and that it results in benefits for them.

    Successful IPM is most commonly applied against pests and diseases in crop production. When comparing the number of research articles on IPM in crop production with the number of research articles on IPM in animal production, it becomes clear that a paucity of scientific papers have been published on the latter. In laying hen facilities, for example, the application of all but basic IPM is still rare, even though the benefits of IPM have been described for poultry pests and disease vectors. In laying hen facilities Dermanyssus gallinae (PRM=poultry red mite), an hematophagous parasite, is common in many parts of the world. This mite is hard to control and negatively affects hen health, ‐welfare and farm economics, with estimated costs of infestation reaching 130 million euro per year in Europe. Currently, implementation of IPM for D. gallinae in laying hen facilities is limited to some combination of cleaning between flocks, limited preventive measures, and application of chemically or physically acting products. Implementation of more advanced IPM programmes for D. gallinae should therefore be considered to improve control prospects for this pest in laying hen facilities.

    This thesis focuses on the knowledge necessary for advancing IPM for D. gallinae in laying hen facilities. More specifically it focuses on prevention, monitoring and population modelling of this significant pest, with preventive measures and monitoring being key in advancing IPM per se.

    Knowledge assessment. To develop IPM for D. gallinae in laying hen facilities, biological and ecological knowledge of D. gallinae and knowledge of the effects of biotic and a‐biotic factors on this pests’ population development are required (Chapter 2). Therefore, a seminar was organized with eighteen D. gallinae researchers, from eight different European countries, with the aim of amassing existing expertise. This seminar gave insight into the current knowledge and knowledge gaps, regarding D. gallinae, also informing future perspectives and required developments for improving control of D. gallinae in laying hen facilities. During four sessions, the researchers present discussed lifecycle issues, effects of D. gallinae on hen and egg production, monitoring methods for D. gallinae infestations in laying hen facilities and control methods for D. gallinae in laying hen facilities. It was concluded that, where the D. gallinae lifecycle is concerned, a lot is still unknown about the mites feeding behaviour and preferences, mating behaviour, survival and conditions required for reproduction, host finding, aggregation cues, and attractant and repellent substances. When focusing on the effects of D. gallinae on the hen and on egg production it was agreed that a D. gallinae infestation is likely to result in higher water intake, lower egg production, lower feed conversion, increase of the immune response and reduced feather quality. It was also suggested that these effects may be hen genotype dependent, and further noted that effects are rarely quantified and need further investigation. Though monitoring was considered to be most important to improve control of D. gallinae, it was concluded that the available monitoring methods only indicate trends and a robust monitoring plan is lacking. The participants considered heating the hen house combined with a chemical treatment to be the most promising control method. Future promising developments for control of D. gallinae were considered to be use of vaccination, predatory mites and entomopathogenic fungi. The effects of D. gallinae on human health were not extensively discussed, but it was concluded that D. gallinae can be of medical significance, either directly via reaction to mite bites, or indirectly via human exposure to the chemicals used to control D. gallinae.

    Prevention. To acquire knowledge on the routes of introduction and spread of D. gallinae in laying hens facilities, the Hazard Analysis and Critical Control Points (HACCP) system was used (Chapter 3). The structure of this system allows the user to identify the risk factors and the critical control points for the introduction and spread of pathogens and parasites. This method was further used to identify preventive and corrective actions against D. gallinae. Four experts identified 41 hazards for introduction and spread of D. gallinae in laying hen facilities. To prevent these hazards, these experts made several suggestions for corrective actions. The risks of 41 hazards were calculated by multiplying the likelihood (1= occurring seldomly/theoretically; 2= occurring approximately once a year; 3= occurring repeatedly/more than once a year) by the severity (1 = low / single place in the facility becomes infested with D. gallinae; 2= moderate/ facility becomes infested at more than one location; 3= high/ D. gallinae infestation occurs at almost all places within the laying hen facility) of infestation. Hazards with a risk above 3, or with a severity of 3, were regarded as Critical Control Points (CCP’s). The CCP’s with the highest risks (risk of 6 and higher) for introduction of D. gallinae in laying hen facilities were: introduction of new flocks, containers and crates, the farmer and their employees. The CCP’s with the highest risks (risk of 6 and higher) for spread of D. gallinae between laying hen facilities were mice, rats and flies, wild birds, the feeding system, shared material and equipment, the egg conveyer belt, manure aeration pipes, removal of cadavers, visitors and external personnel, the farmer and their employees. The critical limits, a procedure step of the HACCP system which will be followed by a corrective action when the limit is exceeded, could not be determined as a result of lack of knowledge about thresholds. Subsequently, suggestions were made for monitoring the mite population and for documentation and validation. A checklist was devised using the corrective action from the CCP’s with the highest risks. This management tool for layer farmers was evaluated by UK and Dutch layer farmers as feasible and useful.

    Monitoring. The approach of Reflexive Interactive Design (RIO) was used to design an automated monitoring tool for D. gallinae, including an automated mite detection sensor (Chapter 6). The approach generated effective and technically feasible solutions for the key functions of the automated mite detection sensor, these being 1) the assessment of the D. gallinae population, 2) localizing the location and assessing the time of detection and 3) removal of mites from the detection area. Three different design concepts were designed using these solutions. As an additional, albeit proven essential step to the RIO approach, the main solutions were tested with live mites ensuring the alignment of solutions with the biology and behaviour of D. gallinae in vivo. A combination of the best solutions were developed in two different prototypes. These prototypes were subsequently tested in the laboratory and on farm. The prototype situated under the perch, with a through beam sensor and a pump to remove mites from the sensor after recording, was the most successful model. The designed automated mite detection sensor, or automated mite counter, for D. gallinae was subsequently validated in experimental laying hen cages with live birds and a growing population of D. gallinae (Chapter 5). The study resulted in 17 data points, each being a combination of ‘number of mites counted’ by the automated mite counter and the ‘number of mites present’ in the experimental laying hen cages. The regression line between the ‘number of mites counted’ and the ‘number of mites present’ demonstrated that the automated mite counter was able to track the D. gallinae population effectively.

    Population modelling. Step 2 of IPM describes not only pest monitoring in the field, but also ‘scientifically sound warning, forecasting and early diagnosis systems, where feasible, as well as the use of advice from professionally qualified advisors’. To advance this step for D. gallinae we developed and demonstrated an operational model, forecasting the mite population dynamics and evaluating and forecasting the effect of a treatment application for D. gallinae in laying hen facilities. For IPM this model and the required inputs need to be 1) labour‐extensive with minimal staff input, preferably automatically implementing “real time” measurement data into models; 2) operational, providing easily interpretable data, forecasting pest population dynamics and the moment a threshold will be exceeded; 3) able to compensate for different locations and time‐specific‐interactions and variables (e.g. management and temperature), enabling the handling of variability of the parameters of interest; 4) able to identify pest hotspots; 5) able to estimate and forecast treatment efficacy; and 6) applicable for different monitoring methods and therefore able to correct for monitoring measurement errors. Prior to the development of the population dynamics model a high variation in population growth was found which could be only partly explained by temperature, flock age, treatment, and compartment/laying hen facility. A substantial part of the total variation remained unexplained, or was found to be temporal. As a result of this partly temporal variation, a dynamic approach was suggested to improve the forecasting quality of a population dynamics model. With the input of population monitoring data, temperature data and information of the dates of any D. gallinae treatment interventions, the developed model was able to forecast the population dynamics of D. gallinae post treatment and without treatment while compensating for location and time specific interactions, handling the variability of the parameters. Moreover, this population dynamics model was able to forecast the D. gallinae population using data from different monitoring methods. Together with the models compatibility with different housing systems and its ability to forecast the mite population dynamics (requiring only three relative easy obtainable parameters), this model is an improvement over existing approaches for forecasting D. gallinae that could contribute to steps 2 and 8 of IPM for D. gallinae in laying hen facilities.

    The results from this study directly facilitate advanced IPM programmes for D. gallinae in laying facilities. The new ‘products’ developed are tools for prevention, monitoring, forecasting population dynamics and evaluating treatment effects, representing the requirements of IPM steps 1, 2, and 8. Indirectly the results may accelerate the development of new control measures, with knowledge acquired through use of the developed products it also is likely to contribute to IPM steps 3, 4, 6 and 8 in the future; e.g. the determination of an action threshold, and a tool advising farmers on the most effective and economic time for applying a corrective action or hotspot treatment for D. gallinae.

    With the obtained knowledge and new products implemented to control D. gallinae in laying hen farms, major advances can be made in IPM for this pest. More specifically, as a result of this work IPM for D. gallinae in laying hen facilities can be advanced by the identification of preventative control measures, the development of an automated monitoring tool and a model forecasting mite population dynamics and evaluating applied treatments. Consequently, the results of this study can be expected to improve hen health, welfare and farm economics for the egg production industry. In the future, advances in other IPM programmes can be expected when the obtained knowledge, tools and methods are transferred to other pest species in multiple sectors.

    Handelingsperspectief voor pluimveehouders in de preventie van laag- en hoogpathogene vogelgriep (AI)
    Bokma, Martien ; Bergevoet, Ron ; Elbers, Armin ; Goot, Jeanet van der; Neijenhuis, Francesca ; Niekerk, Thea van; Leenstra, Ferry - \ 2016
    Wageningen : Wageningen Livestock Research (Wageningen Livestock Research rapport 998) - 42
    aviaire influenza - hennen - pluimveehouderij - boeren - dierziektepreventie - risicofactoren - avian influenza - hens - poultry farming - farmers - animal disease prevention - risk factors
    Committed by the Dutch poultry sector research is carried out concerning acting perspective for prevention of AI-introduction on poultry farms, based on existing knowledge. The findings are shown in two parts: part I with practical advices for poultry farmers, and part II with its underpinning with a summary of existing knowledge of risk factors, preventive measures, early detection and possibilities for promoting desired (preventive) behaviour.
    Effect van strooiselverwijdering bij leghennen in volièrehuisvesting op de emissie van ammoniak, geur, broeikasgassen en fijnstof
    Mosquera, J. ; Emous, R. van; Hattum, Theo van; Nijeboer, G. ; Hol, J.M.G. ; Dooren, H.J. van; Ogink, N.W.M. - \ 2016
    Wageningen : Wageningen Livestock Research (Wageningen Livestock Research rapport 995) - 69
    dierenwelzijn - dierlijke productie - pluimvee - hennen - huisvesting, dieren - diergezondheid - animal welfare - animal production - poultry - hens - animal housing - animal health
    This report summarizes the results of measurements performed in the framework of the programmatic Approach nitrogen (PAS) to determine the effect of removing litter from livestock housing of laying hens (to maintain a thin layer of litter in the animal building) on the emission of ammonia, fine dust, odour and greenhouse gases (methane, nitrous oxide). Removing the litter led to significantly lower emissions of NH3 and PM10 (on average 20-22% lower emissions). Although in seven of all nine measurements removing the litter resulted in lower odour emissions (~25% emission reduction), no significant effect was found of removing the litter on odour removal. For CH4 and N2O, removing litter did not result in significantly lower emissions. When a thin litter layer (less than 2-3 cm) can be maintained, a reduction of 25-35% in NH3 and PM10 emissions may be achieved.
    Het haantje weer op de kaart
    Leenstra, Ferry - \ 2016
    animal welfare - animal production - chicks - hens - animal ethics - animal health

    Mannelijke kuikens van legkippen leven niet langer dan een dag. Om die verspilling tegen te gaan, wordt geprobeerd het vlees van deze haantjes weer op tafel te krijgen. Met succes maar voorlopig is het beter te voorkomen dat deze haantjes het levenslicht zien.

    Disentangling the domestic contract : understanding the everyday-life construction of acceptability -or non-acceptability- of keeping and killing animals for food
    Nijland, Hanneke J. - \ 2016
    Wageningen University. Promotor(en): Cees van Woerkum; Noelle Aarts. - Wageningen : Wageningen University - ISBN 9789462578296 - 325
    meat - vegetarians - vegetarianism - vegetarian diets - killing of animals - meat animals - meat production - households - environmental impact - sustainability - animal welfare - animal production - animal ethics - food - dairy cattle - beef cattle - pigs - poultry - broilers - hens - vlees - vegetariërs - vegetarisme - vegetarische diëten - doden van dieren - slachtdieren - vleesproductie - huishoudens - milieueffect - duurzaamheid (sustainability) - dierenwelzijn - dierlijke productie - dierethiek - voedsel - melkvee - vleesvee - varkens - pluimvee - vleeskuikens - hennen

    When we were children learning the names of animals, farm utensils and food products from picture books, talking about farming animals and related food products appeared simple. However, the intricate realities of modern-day farming practices differ momentously from this primary reference - the picture books. The topic brings about polarized responses, both rationally and emotionally, reflecting very diverse outlooks on the world. This dissertation reports on a research, set in the Netherlands and Turkey, that was designed to improve our understanding of the everyday-life construction of the acceptability -or non-acceptability- ofkeeping and killing animals for food, or in other words: to disentangle the domestic contract.

    Are all eggs equal? : embryonic development and nutrient metabolism in chicken eggs of different origins
    Nangsuay, A. - \ 2016
    Wageningen University. Promotor(en): Bas Kemp, co-promotor(en): Henry van den Brand; R. Meijerhof. - Wageningen : Wageningen University - ISBN 9789462577749 - 213
    eggs - hens - broilers - characteristics - strains - embryonic development - nutrients - metabolism - hatcheries - poultry - nutrition physiology - eieren - hennen - vleeskuikens - karakteristieken - stammen (biologisch) - embryonale ontwikkeling - voedingsstoffen - metabolisme - broedinstallaties - pluimvee - voedingsfysiologie

    Hatching eggs, supplied to hatcheries are originating from different origins varying in breed, strain, and breeder age. These hatching eggs can be different in size, composition and eggshell properties, which might influence nutrient and O2 availability and consequently could affect embryonic development and nutrient metabolism. The aim of this thesis was therefore 1) to investigate effects of egg origin on nutrient and O2 availability, 2) to investigate effects of egg origins on nutrient metabolism and embryonic development and 3) to investigate consequences of different egg origins on the incubation process and hatching characteristics. In five studies, effects of different egg origins on nutrient and O2 availability, nutrient metabolism, embryo development and hatching characteristics were investigated. The first and second study focused on breeder age and egg size. The third study on breed; broilers and layers. The fourth study on broiler strain and the fifth study on breeder age, strain and eggshell temperature (EST). The overall findings in this thesis suggest that hatching eggs from different origins are not equal in availability of nutrients and O2. Nutrient availability is altered through variation in yolk size, especially by the effects of breeder age and breed. O2 availability is altered by differences in eggshell properties, which is influenced by especially breed and broiler strain. The availability of both nutrients and O2 plays a role on nutrient metabolism measured as embryonic heat production (HP) and consequently on embryonic development. Between incubation day (E) E7 and E14, both nutrient and O2 availability might affect nutrient metabolism as shown in the results of the broiler and layer comparison. Between E14 and hatching, the availability of O2 becomes the most determinant factor for nutrient metabolism and consequently for embryonic development. An increase in EST from 37.8 to 38.9°C from E7 onward resulted in an acceleration of nutrient metabolism and embryonic development until E16, but thereafter a high EST resulted in reduced yolk free body mass development. Embryos with an accelerated metabolic speed at an early stage of incubation, caused by an increased EST, might reach limited O2 availability at a higher magnitude than the embryos at a normal EST. As a result, nutrient metabolism is restricted and embryonic development is depressed. It can be concluded that not only the HP, but also the availability of O2 is crucial to be taken into account for developing incubator temperature. The principle is to obtain an optimal EST, which could maintain the balance between O2 requirement (driven by nutrient metabolism) and O2 availability for a continuing optimal nutrient metabolism to generate sufficient energy for embryonic development throughout incubation.

    Effects of early life conditions on immunity in broilers and layers
    Simon, K. - \ 2016
    Wageningen University. Promotor(en): Bas Kemp, co-promotor(en): Aart Lammers. - Wageningen : Wageningen University - ISBN 9789462576711 - 188
    broilers - hens - ontogeny - poultry feeding - chicken housing - immune response - antibiotics - gastrointestinal microbiota - immunology - immunity - vleeskuikens - hennen - ontogenie - pluimveevoeding - huisvesting van kippen - immuniteitsreactie - antibiotica - microbiota van het spijsverteringskanaal - immunologie - immuniteit

    ABSTRACT

    The course for later life immune responses is set early in life during the developmental phase of the immune system and accordingly disturbances of immune development may have long-term consequences for host health. In terms of immune activation and immune development the gut microbiota play an important role and consequently disturbances of early life microbial colonization may affect host immunity later in life. In chickens, disturbances of microbial colonization may be caused by various early life conditions which in turn may affect robustness of the chick in the long term. The aim of this thesis was to assess the effects of several early life factors including time of access to feed post hatch (immediately or 72 hours delayed), housing conditions, antibiotic treatment, and intestinal pathology on the intestinal microbiota composition, immune development, and specific antibody response later in life in chickens. Additionally, possible differences between broilers and layers were taken into account as unintentional co-selection of immunological traits may have taken place during the selection process for different production traits. Delayed access to feed and administration of antibiotics early in life led to a shift in early life microbiota composition, which seemed to be restored quite quickly in both cases. Microbiota composition in response to DSS was not investigated, but based on rodent studies was expected to be influenced. Ileal immune development, which was assessed in terms of relative cytokine and immunoglobulin mRNA expression levels was not affected by feeding strategy post hatch (early vs. delayed), but a downregulation of ileal immunoglobulin expression levels could be observed during DSS treatment. All early life factors investigated affected the specific antibody response towards an immunological challenge later in life. Interestingly, there seemed to be an interaction between immediate access to feed post hatch and immune responsiveness towards the environment, thus early feeding may influence the adaptive capacity of chickens in different environments. Regarding the differences between breeds it is interesting to note that broilers seem to have developed a more humoral oriented immune strategy, while layers seem to react in a more pro-inflammatory way. Taken together, results suggested that early life conditions may influence priming of the immune system during its developmental phase, leading to altered antibody responses later in life. Furthermore, broilers and layers seem to have developed different immune strategies. Early life conditions as well as possible differences between breeds should therefore be taken into account in future immunological studies.

    Genomic selection in egg-laying chickens
    Heidaritabar, M. - \ 2016
    Wageningen University. Promotor(en): Martien Groenen, co-promotor(en): John Bastiaansen. - Wageningen : Wageningen University - ISBN 9789462576704 - 220
    hens - genomics - genetic variation - selective breeding - quantitative traits - breeding value - animal genetics - animal breeding - hennen - genomica - genetische variatie - selectief fokken - kwantitatieve kenmerken - fokwaarde - diergenetica - dierveredeling

    Abstract

    Heidaritabar, M. (2016). Genomic selection in egg-laying chickens. PhD thesis, Wageningen University, the Netherlands

    In recent years, prediction of genetic values with DNA markers, or genomic selection (GS), has become a very intense field of research. Many initial studies on GS have focused on the accuracy of predicting the genetic values with different genomic prediction methods. In this thesis, I assessed several aspects of GS. I started with evaluating results of GS against results of traditional pedigree-based selection (BLUP) in data from a selection experiment that applied both methods side by side. The impact of traditional selection and GS on the overall genome variation as well as the overlap between regions selected by GS and the genomic regions predicted to affect the traits were assessed. The impact of selection on genome variation was assessed by measuring changes in allele frequencies that allowed the identification of regions in the genome where changes must be due to selection. These frequency changes were shown to be larger than what could be expected from random fluctuations, indicating that selection is really affecting the allele frequencies and that this effect is stronger in GS compared with BLUP. Next, concordance was tested between the selected regions and regions that affect the traits, as detected by a genome-wide association study. Results showed a low concordance overall between the associated regions and the selected regions. However, markers in associated regions did show larger changes in allele frequencies compared with the average changes across the genome. The selection experiment was performed using a medium density of DNA markers (60K). I subsequently explored the potential benefits of whole-genome sequence data for GS by comparing prediction accuracy from imputed sequence data with the accuracy obtained from the 60K genotypes. Before sequencing, the selection of key animals that should be sequenced to maximize imputation accuracy was assessed with the original 60K genotypes. The accuracy of genotype imputation from lower density panels using a small number of selected key animals as reference was compared with a scenario where random animals were used as the reference population. Even with a very small number of animals as reference, reasonable imputation accuracy could be obtained. Moreover, selecting key animals as reference considerably improved imputation accuracy of rare alleles compared with a set of random reference animals. While imputation from a small reference set was successful, imputation to whole-genome sequence data hardly improved genomic prediction accuracy compared with the predictions based on 60K genotypes. Using only those markers from the whole-genome sequence that are more likely to affect the phenotype was expected to remove noise from the data, but resulted in slightly lower prediction accuracy compared with the complete genome sequence. Finally, I evaluated the inclusion of dominance effects besides additive effects in GS models. The proportion of variance due to additive and dominance effects were estimated for egg production and egg quality traits of a purebred line of layers. The proportion of dominance variance to the total phenotypic variance ranged from 0 to 0.05 across traits. Also, the impact of fitting dominance besides additive effects on prediction accuracy was investigated, but was not found to improve accuracy of genomic prediction of breeding values.

    Vermarkten van haantjes van legrassen : Samenvatting van en vervolg op rapport 739 (2013,Wageningen UR Livestock Research)
    Leenstra, F.R. ; Steverink, M.H.A. ; Niekerk, T.G.C.M. van - \ 2016
    Wageningen UR Livestock Research (Livestock Research rapport 937) - 29
    kuikens - hanen - hennen - slachtdieren - dubbel-doel rassen - markten - dierenwelzijn - dierlijke productie - pluimvee - dierethiek - diergezondheid - chicks - cocks - hens - meat animals - dual purpose breeds - markets - animal welfare - animal production - poultry - animal ethics - animal health
    Licht op licht: licht en verlichting in de pluimveehouderij in relatie tot beschadigend pikgedrag
    Niekerk, T.G.C.M. van; Ellen, H.H. ; Winkel, A. - \ 2015
    Livestock Research Wageningen UR (Livestock Research rapport 922) - 33
    pluimvee - licht - lichtregiem - gezichtsvermogen - verenpikken - pluimveehouderij - dierenwelzijn - dierlijke productie - hennen - huisvesting, dieren - diergezondheid - diergedrag - poultry - light - light regime - vision - feather pecking - poultry farming - animal welfare - animal production - hens - animal housing - animal health - animal behaviour
    In this report an overview is given of the technical knowledge with regards to light. light sources and the vision of poultry. Recent developments in lighting of poultry houses are mainly focused on new light sources, specifically LED, and the presence of daylight. Daylight comprises UV, which for poultry is a visual part of the spectrum. Chickens also see better in the red and green-blue spectrum. Technically it is possible to make lamps in the desired spectrum, but there is insufficient knowledge of the demands of the bird to be able to tune the lamps to their needs.
    Vrijheid & blijheid voor de leghen : inspirerende alternatieven voor de buitenuitloop
    Niekerk, T.G.C.M. van; Mul, M.F. ; Hommes, M. - \ 2015
    Wageningen UR Livestock Research
    hennen - pluimveehouderij - uitloop - duurzame veehouderij - huisvesting van kippen - innovaties - dierenwelzijn - dierlijke productie - pluimvee - diergedrag - hens - poultry farming - outdoor run - sustainable animal husbandry - chicken housing - innovations - animal welfare - animal production - poultry - animal behaviour
    Binnen het project ‘Inrichting Buitenuitloop Pluimvee’ is gezocht naar nieuwe, vermarktbare concepten voor de legpluimveehouderij op basis van een uitloop zonder de huidige milieu en diergezondheidsnadelen. Tijdens een workshop hebben ketenpartijen, pluimveehouders, glastuinders, ontwerpers en onderzoekers gezamenlijk gebrainstormd over de mogelijkheden. De ontwerpen in deze brochure zijn het resultaat van die workshop.
    Gelijkspel
    Bestman, M.W.P. ; Verwer, C.M. ; Leenstra, F.R. ; Niekerk, T.G.C.M. van; Reuvekamp, B.F.J. - \ 2015
    De Pluimveehouderij 43 (2015)11. - ISSN 0166-8250 - p. 29 - 29.
    pluimveehouderij - snavelkappen - verenkleed - hennen - uitloop - biologische landbouw - dierenwelzijn - verenpikken - pluimvee - dierlijke productie - diergedrag - diergezondheid - poultry farming - debeaking - plumage - hens - outdoor run - organic farming - animal welfare - feather pecking - poultry - animal production - animal behaviour - animal health
    Onderzoek weerspreekt dat kippen met onbehandelde snavels eerder kaal en kaler worden dan behandelde hennen, zoals vaak wordt gesteld. Er is weinig verschil in verenkleed tussen bio- en vrije-uitloophennen.
    Praktijkmonitor ook in de legsector
    Niekerk, T.G.C.M. van - \ 2015
    De Pluimveehouderij 45 (2015)8. - ISSN 0166-8250 - p. 26 - 27.
    pluimveehouderij - hennen - dierenwelzijn - diergezondheid - monitoring - diergedrag - verenpikken - dierlijke productie - pluimvee - poultry farming - hens - animal welfare - animal health - monitoring - animal behaviour - feather pecking - animal production - poultry
    Als voorbereiding op het naderend verbod op ingrepen, wordt bij (opfok)leghennen, net als bij vleeskuikenouderdieren, (praktijk)kennis vergaard. Om met die kennis de status en mogelijkheden van het houden van leghennen zonder bepaalde ingrepen in kaart te brengen.
    Radio en kleurige overalls helpen tegen verenpikken
    Rodenburg, T.B. - \ 2015
    WageningenWorld (2015)2. - ISSN 2210-7908 - p. 7 - 7.
    hennen - kippen - verenpikken - diergedrag - stressfactoren - dierenwelzijn - geluiden - radio - kleur - diergezondheid - dierlijke productie - pluimvee - hens - fowls - feather pecking - animal behaviour - stress factors - animal welfare - sounds - radio - colour - animal health - animal production - poultry
    Wageningen University heeft samen met de Universiteit Utrecht en de Rijksuniversiteit Groningen manieren gevonden om verenpikken bij leghennen tegen te gaan. Dat biedt perspectief bij het verbod op snavelkappen dat in 2018 van kracht wordt.
    Stalboekje pluimvee 2015 : handboek voor natuurlijke pluimveegezondheidszorg met kruiden en andere natuurproducten
    Groot, M.J. ; Puls-van der Kamp, I. ; Asseldonk, T. van - \ 2015
    Wageningen : RIKILT Wageningen UR - 112
    pluimveehouderij - pluimvee - diergezondheid - dierenwelzijn - medicinale planten - geneeskrachtige kruiden - dierziektepreventie - dierlijke productie - biologische landbouw - handboeken - vleeskuikens - hennen - poultry farming - poultry - animal health - animal welfare - medicinal plants - herbal drugs - animal disease prevention - animal production - organic farming - handbooks - broilers - hens
    In dit boekje worden aanwijzingen gegeven om met natuurlijke middelen de gezondheid van de dieren te bevorderen en zo ziektes te voorkomen. Tevens kunnen middelen worden ingezet om de ernst van de ziekte te reduceren. Doel is tevens om de dierenartsen te informeren over de mogelijkheden van natuurproducten en de wetenschappelijke onderbouwing hiervan inzichtelijk te maken
    Estimating requirements for apparent faecal and standardised ileal digestible amino acids in laying hens by a metaanalysis approach
    Krimpen, M.M. van; Veldkamp, T. ; Riel, J.W. van; Khaksar, V. ; Hashemipour, H. ; Blok, M.C. ; Spek, W. - \ 2015
    Wageningen : Wageningen UR Livestock Research (Livestock research report 848) - 71
    hennen - aminozuren - voer - meta-analyse - verteerbaarheid - eiwitverteerbaarheid - dunne darm - voedingsstoffengehalte - voedingsstoffenbehoeften - voedingsbehoeften - pluimvee - pluimveevoeding - hens - amino acids - feeds - meta-analysis - digestibility - protein digestibility - small intestine - nutrient content - nutrient requirements - feed requirements - poultry - poultry feeding
    The aim of the present study is to update the requirements for the essential amino acids of laying hens, both on a AFD and SID basis, by performing a meta-analysis on dose-response studies used to derive requirement values for essential amino acids (lysine, methionine+cysteine, threonine and tryptophan) in laying hens as presented in the literature. In this meta-analysis, the data are fitted by use of the Wood equation (see paragraph 2.4). The amino acid intake levels for realizing maximal rate of lay, egg mass and feed efficiency are provided. The amino acid requirements for use in practice are based on the amino acid intake levels at which 95% of these maximum responses were reached.
    Fosforgehalte in legvoeders kan omlaag
    Star, L. van der; Krimpen, M.M. van - \ 2015
    De Pluimveehouderij 45 (2015)5. - ISSN 0166-8250 - p. 20 - 21.
    pluimveehouderij - pluimveevoeding - fosfor - hennen - voersamenstelling - poultry farming - poultry feeding - phosphorus - hens - feed formulation
    Onderzoek naar de fosforbehoefte van leghennen is gedateerd. Daarom hebben Schothorst Feed Research en Wageningen UR Livestock Research de P-behoefte van huidige leghennen onderzocht. De uitkomst van de literatuurstudie zijn eerder beschreven. In dit artikel staan de resultaten van het bijbehorende dierexperiment.
    Handvatten voor vermindering geuroverlast bij varkens- en pluimveebedrijven
    Ellen, H.H. ; Aarnink, A.J.A. ; Harn, J. van; Huis in 'T Veld, J.W.H. - \ 2014
    Wageningen : Wageningen UR Livestock Research (Livestock research rapport 789) - 37
    varkenshouderij - varkens - pluimvee - pluimveehouderij - vleeskuikens - kalkoenen - hennen - stankbestrijding - agrarische bedrijfsvoering - klimaatregeling - hokken - bedrijfshygiëne - strooisel - luchtreinigers - pig farming - pigs - poultry - poultry farming - broilers - turkeys - hens - odour abatement - farm management - air conditioning - pens - industrial hygiene - litter (plant) - air cleaners
    Via bedrijfsbezoeken aan varkens- en pluimveebedrijven is gezocht naar maatregelen die de belasting van geur op de omgeving kunnen verminderen. Naast technische oplossingen zoals de luchtsnelheid en -richting, is vooral gekeken naar het gevoerde management. Voor de varkenshouderij is daarbij het voorkomen van hokbevuiling via klimaatbeheersing en hokindeling en -inrichting een belangrijke maatregel. Voor vleeskuikens is de keuze van het strooisel mogelijk een belangrijke factor en voor leghennen het zorgen voor een dunne strooisellaag. Het toepassen van luchtreinigingstechnieken of maskering van de geur door toevoegingen is alleen economisch interessant als de hoeveelheid ventilatielucht kan worden beperkt.
    Phosphorus requirement in laying hens
    Lambert, W. ; Krimpen, M.M. van; Star, L. - \ 2014
    Lelystad : Schothorst Feed Research (Report / Schothorst Feed Research 1362-2) - 48
    hennen - fosfor - voedingsstoffenbehoeften - pluimveevoeding - voedersupplementen - diergezondheid - pluimveehokken - hens - phosphorus - nutrient requirements - poultry feeding - feed supplements - animal health - poultry housing
    It was hypothesized that P supply by feed in alternative housing systems can be lowered without negative effects on bone quality and production performance. Therefore, the objectives of the current study were 1) to update the retainable phosphorus (rP) needs of two modern laying hen breeds from 36 to 90 weeks of age housed in an aviary system, 2) to investigate the influence of dietary rP levels on Ca and P content in eggs, manure, carcasses and bones.
    Feather pecking and monoamines - a behavioral and neurobiological approach
    Kops, M.S. - \ 2014
    Wageningen University; Utrecht University. Promotor(en): B. Olivier; O. Güntürkün, co-promotor(en): S.M. Korte; Liesbeth Bolhuis. - Utrecht, The Netherlands : Utrecht University - ISBN 9789039361283 - 172
    pluimveehouderij - hennen - verenpikken - diergedrag - dierenwelzijn - pluimvee - diergezondheid - dierlijke productie - serotonine - dopamine - fenotypen - genotypen - neurotransmitters - invloeden - poultry farming - hens - feather pecking - animal behaviour - animal welfare - poultry - animal health - animal production - serotonin - dopamine - phenotypes - genotypes - neurotransmitters - influences
    Severe feather pecking (SFP) remains one of the major welfare issues in laying hens. SFP is the pecking at and pulling out of feathers, inflicting damage to the plumage and skin of the recipient. The neurobiological profile determining the vulnerability of individual hens to develop into a severe feather pecker is unknown, although brain monoamines such as serotonin (5-HT) and dopamine (DA) seem to play a role. Previous studies related lower 5-HT and DA turnover ratios to an increased risk to develop SFP.In this thesis, monoamine levels in brain areas involved in emotional regulation and motor control were compared between phenotypically and genetically selected high and low feather peckers at different ages. It was found that adult high feather peckers had higher monoaminergic activity (lower metabolite levels and/or turnover ratios) in comparison to low feather peckers, which is in contrast with results on young hens. Differences were seen in several brain areas, namely the dorsal thalamus, medial striatum, amygdala, caudocentral nidopallium, and the somatomotor arcopallium, but to a lesser extend or not in the caudolateral nidopallium and the hippocampus. To investigate the exact neurobiological mechanism behind severe feather pecking further extracellular levels of 5-HT and DA and their metabolites were measured by in vivo microdialysis. Up till now, microdialysis has only been executed in young chickens, but this thesis describes the first microdialysis study performed in adult laying hens. It was found that adult severe feather peckers had a higher baseline release of 5-HT in the caudal nidopallium, a large associative area in the chicken’s forebrain. This result could not be explained by the amount of 5-HT presynaptically stored, as both high and low SFP lines displayed a similar 5-HT release after d-fenfluramine administration. This confirms that genetic selection on SFP has altered the serotonergic system in feather pecking-phenotypes. With clear phenotypic and genotypic differences in brain areas related to emotional regulation and motor control, it can be assumed that brain deficits at a young age increase an individual’s vulnerability to stressful environmental changes, which is associated with the prevalence of SFP later in life. The cause of the inversion of neurochemical patterns in young and adult high and low feather pecking hens remains to be elucidated. Perhaps this inversion is caused by development itself. On the other hand, higher behavioral patterns (SFP and other types of allopecking) observed in the high feather pecking chickens might have influenced the monoaminergic activity since the brain influences behavior and vice versa. Altogether, this thesis demonstrates the importance of considering the impact of genetic selection and also environmental conditions on brain neurotransmission and with that, on the vulnerability of individual chickens to develop SFP. Both the serotonergic and dopaminergic systems are involved in the development of SFP. With SFP being a multifactorial problem both genotype and phenotype have to be taken into account. Furthermore, in vivo microdialysis is a valuable approach to investigate why individual laying hens start SFP. This will lead to further understanding and ultimately in the reduction of SFP.
    Animal welfare decisions in Dutch poultry and pig farms
    Gocsik, E. - \ 2014
    Wageningen University. Promotor(en): Alfons Oude Lansink, co-promotor(en): Helmut Saatkamp; Ivo van der Lans. - Wageningen : Wageningen University - ISBN 9789462571624 - 261
    dierenwelzijn - dierlijke productie - pluimvee - varkens - investering - economie - varkenshouderij - pluimveehouderij - huisvesting, dieren - agrarische productiesystemen - vleeskuikens - hennen - animal welfare - animal production - poultry - pigs - investment - economics - pig farming - poultry farming - animal housing - agricultural production systems - broilers - hens

    Abstract

    The minimum level of animal welfare (AW) is guaranteed by EU and national legislation in most European countries. Within the current international economic and political environment further improvements in the welfare of farm animals predominantly rely on market initiatives. Market initiatives set requirements in terms of AW that exceed the legal minimum standards. Participation in a particular market initiative is a voluntary choice of the farmer. The overall objective of this dissertation was to analyze the factors that determine farmers’ decision-making with regard to the implementation of AW standards, and to identify barriers to the adoption of above-legal AW standards at farm level. In this dissertation farmers’ decision-making is conceptualized as a process in which farmers trade off financial and non-financial goals. Financial goals relate to monetary aspects, whereas non-financial goals appeals to farmers’ intrinsic motivation to improve AW. This dissertation suggests that broiler and fattening pig farmers do not have a strong intrinsic motivation to switch to a production system that provides higher level of AW than the minimum legal requirements. In this respect, at farm level certain financial preconditions have to be met to enable farmers to adopt higher AW standards. More specifically, farmers require a price premium that is at least sufficient to cover extra costs as a result of higher animal welfare standards. Furthermore, it is important to manage the (perceived) uncertainty of the market and price premiums. These imply that middle-market segment could be attractive for farmers due to its high cost-efficiency, i.e., realize the highest relative increase in AW at the lowest costs, which is also in the best interest of other stakeholders in the supply chain. Furthermore as switching to a middle-market system primarily affects variable costs farmers are given the flexibility to revert to the conventional system if their expectations are not met. Middle-market segment products, as they improve on many production attributes related to AW, may also offer alternatives for consumers that take many attributes into account to form an opinion of the animal friendliness of a production system. In the light of the foregoing, further development of the middle-market segment appears to be a reasonable direction in improving AW. In order to facilitate the further development of the middle-market segment a high involvement of all stakeholders in the supply chain, i.e., slaughterhouses, processors, retail, NGOs, and the government as well is required.

    Ammoniakvorming in mestdroogsystemen op legpluimveebedrijven met mestbandbeluchting = Ammonia production in manure drying systems at layer farms with manure belt aeration
    Winkel, A. ; Blanken, K. ; Ellen, H.H. ; Ogink, N.W.M. - \ 2014
    Lelystad : Wageningen UR Livestock Research (Report / Wageningen UR Livestock Research 730) - 20
    pluimveehouderij - hennen - pluimveehokken - ammoniakemissie - emissiereductie - droge stof - mestverwerking - drogen - luchtverontreiniging - poultry farming - hens - poultry housing - ammonia emission - emission reduction - dry matter - manure treatment - drying - air pollution
    In this study, we investigated whether ammonia emissions from manure drying systems can be reduced by pre-drying the manure to ca. 55% of dry matter. This study shows that the ammonia emission of drying manure decreases with dry matter content. Pre-drying of manure to 55% of dry matter prevents the occurrence of high emissions in the first phase of the drying process and can reduce the emission from manure drying systems with 50–60%.
    Emissies uit mestdroogsystemen op leghennenbedrijven bij dagontmesting en versneld drogen = Emissions from manure drying systems on layer farms using 24-h manure removal and rapid drying
    Winkel, A. ; Huis in 'T Veld, J.W.H. ; Nijeboer, G.M. ; Schilder, H. ; Hattum, T.G. van; Ellen, H.H. ; Ogink, N.W.M. - \ 2014
    Lelystad : Wageningen UR Livestock Research (Report / Wageningen UR Livestock Research 731) - 43
    pluimveehouderij - hennen - ammoniakemissie - emissiereductie - pluimveehokken - mestverwerking - drogen - fijn stof - luchtverontreiniging - poultry farming - hens - ammonia emission - emission reduction - poultry housing - manure treatment - drying - particulate matter - air pollution
    In dit onderzoek is de hypothese getoetst dat met het dagelijks afdraaien van alle stalmest naar een mestdroogsysteem (dagontmesting), gevolgd door snelle indroging, de extra ammoniakemissie uit deze droogsystemen aanzienlijk kan worden beperkt. Deze hypothese is bevestigd door het onderzoek. Daarnaast is gebleken dat de aangepaste manier van drogen nog steeds een aanzienlijke fijnstofreductie bewerkstelligt.
    Maatregelen ter vermindering van fijnstofemissie uit de pluimveehouderij: validatie van een oliefilmsysteem op een leghennenbedrijf = Measures to reduce fine dust emission from poultry houses: validation of an oil spraying system on a layer farm
    Winkel, A. ; Huis in 'T Veld, J.W.H. ; Nijeboer, G.M. ; Ogink, N.W.M. - \ 2014
    Lelystad : Wageningen UR Livestock Research (Report / Wageningen UR Livestock Research 801) - 24
    pluimveehouderij - hennen - pluimveehokken - stallen - luchtreinigers - fijn stof - emissiereductie - spuiten - film - plantaardige oliën - monitoring - luchtverontreiniging - poultry farming - hens - poultry housing - stalls - air cleaners - particulate matter - emission reduction - spraying - film - plant oils - monitoring - air pollution
    In this study, the emission reduction of an oil spraying system was determined through validation measurements in a layer house with aviary housing.
    Mogelijkheden voor het vaststellen van emissies van leghennenstallen met een nageschakeld mestdroogsysteem = Possibilities for determining emissions of laying hen houses connected to a manure drying system
    Winkel, A. ; Ellen, H.H. ; Ogink, N.W.M. - \ 2014
    Lelystad : Wageningen UR Livestock Research (Report / Wageningen UR Livestock Research 803) - 20
    pluimveehouderij - hennen - ammoniakemissie - emissiereductie - pluimveehokken - mestverwerking - droging - bepaling - luchtverontreiniging - poultry farming - hens - ammonia emission - emission reduction - poultry housing - manure treatment - drieration - determination - air pollution
    Based on the current state of knowledge, this report explores the possibilities for establishment of emissions for laying hen houses connected to a manure drying system.
    Welzijn van uitgelegde hennen tijdens vangen en vervoer in de winterperiode
    Niekerk, T.G.C.M. van; Gunnink, H. ; Reuvekamp, B.F.J. - \ 2014
    Wageningen : Wageningen UR Livestock Research (Rapport / Wageningen UR Livestock Research 758) - 48
    pluimveehouderij - dierenwelzijn - hennen - pluimvee - diergezondheid - dierlijke productie - transport - vangen van dieren - poultry farming - animal welfare - hens - poultry - animal health - animal production - transport - capture of animals
    24 End-of-lay flocks have been monitored from catching to slaughter to determine various welfare aspects of hens during catching and transport in winter time.
    Verkorte protocollen voor het meten van de effecten van niet-snavelbehandelen bij leghennen, vleeskuikenouderdieren en kalkoenen
    Jong, I.C. de; Niekerk, T.G.C.M. van - \ 2014
    Wageningen : Wageningen UR Livestock Research (Rapport / Wageningen UR Livestock Research 785) - 75
    pluimveehouderij - dierenwelzijn - dierlijke productie - pluimvee - kalkoenen - hennen - vleeskuikenouderdieren - diergezondheid - monitoring - protocollen - snavelkappen - poultry farming - animal welfare - animal production - poultry - turkeys - hens - broiler breeders - animal health - monitoring - protocols - debeaking
    Met ingang van 1 september 2018 zal in Nederland snavelbehandelen bij leghennen, vleeskuikenouderdieren en kalkoenen verboden worden. Doel van dit onderzoek was om op basis van beschikbare literatuur, ervaringen van onderzoekers en ervaringen uit de praktijk protocollen op te stellen waarmee op relatief eenvoudige, maar wel betrouwbare wijze een monitoring van het effect van niet-snavelbehandelen uitgevoerd kan worden. Op basis van literatuuronderzoek, expert consultatie en een beknopt haalbaarheidsonderzoek bij praktijkkoppels zijn protocollen ontwikkeld voor het vastleggen van het effect van het niet-snavelbehandelen bij leghennen (opfok en productie), vleeskuikenouderdieren (opfok en productie) en kalkoenen (vleeskalkoenen). Deze protocollen staan vermeld in de bijlage van dit rapport.
    Social and ethical aspects of (alternatives to) the killing of day-old male chicks
    Bruijnis, Mariëlle - \ 2014
    poultry - hens - killing of animals - animal welfare - animal health - animal production - animal ethics - poultry farming
    Alternatives for killing day-old male chicks
    Woelders, Henri - \ 2014
    poultry - hens - killing of animals - animal welfare - animal health - animal production - poultry farming
    Jaarrapportage onderzoek Animal Welfare Check Points 2013
    Visser, E.K. ; Ouweltjes, W. ; Neijenhuis, F. ; Lourens, A. ; Werf, J.T.N. van der; Gunnink, H. ; Hindle, V.A. ; Verkaik, J.C. ; Binnendijk, G.P. ; Gerritzen, M.A. - \ 2014
    Wageningen : Wageningen UR Livestock Research (Report / Wageningen UR Livestock Research 753) - 89
    dierenwelzijn - transport - slacht - varkens - vleeskuikens - hennen - rundvee - schapen - geiten - diergezondheid - doden van dieren - dierlijke productie - protocollen - veevervoer - animal welfare - transport - slaughter - pigs - broilers - hens - cattle - sheep - goats - animal health - killing of animals - animal production - protocols - transport of animals
    Het project “Animal Welfare Check Points” heeft als doel het ontwikkelen van protocollen voor het beoordelen van het welzijn van slachtdieren tijdens het selecteren en voorbereiden op het primaire bedrijf, tijdens transport en op de slachterij. In de tweede fase van het onderzoek (2013) zijn gegevens verzameld om een idee te krijgen van de gemiddelden en spreiding van de welzijnsparameters in de praktijk. Daarnaast zijn ervaringen opgedaan met de toepassing van de protocollen in de praktijk, en waar nodig zijn protocollen verder aangescherpt.
    The fearful feather pecker : applying the principles to practice to prevent feather pecking in laying hens
    Haas, E.N. de - \ 2014
    Wageningen University. Promotor(en): Bas Kemp; A.G.G. Groothuis, co-promotor(en): Bas Rodenburg; Liesbeth Bolhuis. - Wageningen : Wageningen University - ISBN 9789462570429 - 285
    hennen - verenpikken - bangheid - gedragsproblemen - lijnen - hormonale controle - stressreactie - ontogenie - legresultaten - dierenwelzijn - diergedrag - dierfysiologie - hens - feather pecking - fearfulness - behaviour problems - lines - hormonal control - stress response - ontogeny - laying performance - animal welfare - animal behaviour - animal physiology

    Billions of laying hens are kept worldwide. Severe feather pecking (SFP) is a behaviour which occurs with a high prevalence on commercial farms. SFP, the pecking and plucking of feathers of another bird, induces pain and stress and can ultimately lead to cannibalism. Moreover, SFP can occur if a bird is unable to cope with fear and stress and is living in an inappropriate environment. SFP thus reduces the welfare of many laying hens worldwide. To prevent SFP it is essential to know the risk factors in its development. To that aim, first, two experimental studies were conducted to gain insight in the principles of SFP, and three on-farm studies were conducted to assess the risk factors of SFP under commercial conditions.

    THE PRINCIPLES

    Factors which relate to SFP are high fearfulness as young and low levels of brain and peripheral serotonin (5-HT) and brain dopamine (DA). Furthermore, commercial laying hen lines can differ in SFP tendencies and associated traits indicating that SFP has a genetic component. In chapters 2 and 3, fear response as young and adult, and stress response, 5-HT and DA brain levels as adult were

    compared in hens of two lines: the low mortality line (LML) selected on low levels of mortality due to cannibalism and individual performance vs. the control line (CL) which was selected on individual performance only. Hens were exposed to an Open Field (OF) test at 5 weeks of age and a Manual Restraint (MR) test at 33 weeks of age. At 33 weeks of age, levels of corticosterone (CORT) post MR and 5-HT and DA levels in four brain areas were determined. Hens of the LML were less fearful at both ages and had lower levels of DA in the arcopallium, a somatomotor area involved in fear and motor control, compared to hens of the CL. In chapter 2, it was also shown that fearful chicks had higher levels of CORT and higher activity levels as adult, compared to non-fearful chicks. Moreover,

    presence of fearful animals in the group was related to average CORT levels of their pen members. Fearful hens may induce social instability in a group, and thereby affecting the stress-sensitivity of their group mates. These results indicate that groups differ in levels of fear and stress-sensitivity, and that fearfulness at a young age can lead to stress-sensitivity as adults, which create a risk for development of SFP.

    THE PRACTICE

    In chapters 4, 5 and 6, the laying hen production chain consisting of parent stock, rearing flocks and laying flocks was studied. Risk factors for SFP could originate from previous parts in the chain. Therefore, in all on-farm studies, measurements of SFP, fearfulness, basal CORT and peripheral 5-HT system were obtained, and related to housing conditions and to previous parts in the chain. Fearfulness was assessed, on a flock level, by distance to a stationary person (SP) test and latency

    of bird to approach a novel object (NO). Dekalb White (DW) and ISA brown (ISA) crosses whose pure lines differ in levels of fear, CORT, 5-HT and DA, were compared. First, parent stock (PS) flocks were studied and associations between production performance and measurements of fear, stress and 5-HT were conducted and related to group size conditions (chapter 4). Second, rearing flocks originating from PS flocks were studied throughout the rearing period (chapter 5). High levels of feather damage, CORT and 5-HT in the mothers were related to fearfulness and SFP in their offspring at flock level. Especially, a large flock size and limitation and/or disruption in litter supply affected SFP and levels of fearfulness and 5-HT (chapter 5). Finally, high levels of feather damage during the laying period were related to high SFP rearing, and high fearfulness during rearing and laying (chapter 6). These studies together aimed to determine the risk factors for the development of SFP and the resulting feather damage. The main outcomes of these studies are as follows.

    Ø Parent stock flocks

    DW flocks were more fearful of an SP and hens had higher levels of feather damage than in ISA flocks. ISA flocks, in turn, were more fearful of the NO and hens had higher 5-HT levels than in DW flocks. A small flock size led to higher feed conversion, mortality levels, and smothering events in ISA but not in DW flocks. These results indicate that DW and ISA PS flocks differ in levels of fear and

    feather damage, and respond differently to their social environment. For both crosses, fear of an SP related to high mortality and fear of the NO related to low hen body weight, egg weight, and feed intake. High basal CORT related to low egg weight. High fear and stress levels in PS flocks may, thus, negatively affect (re)production, and thereby potentially negatively influence the developing

    embryo.

    Ø Rearing flocks

    In the DW cross, high CORT, feather damage, and 5-HT of mother hens related to high SFP and fearfulness of their rearing flocks at 1 week of age. At 5 weeks of age, a peak in both gentle feather pecking (GFP) and SFP was recorded, coinciding with a disruption in substrate availability (i.e. a temporal absence of substrate) and a limitation of substrate (i.e. limited amounts of substrate

    provided) in some of the farms. Especially, ISA pullets showed higher SFP under substrate limitation and became more fearful under substrate disruption than DW pullets. ISA pullets had higher 5-HT levels than DW pullets. Only in the ISA cross, high 5-HT related to high fearfulness, specifically under substrate disruption. For both crosses, high fearfulness was related to high feather damage. Furthermore, in a level system (floor system where levels are gradually added) higher levels of SFP and feather damage were found compared to an aviary system (a tier-system with cages and litter area). These results highlight that; 1) parental effects exist in the development of fearfulness and SFP, 2) disruption and limitation in substrate availability can lead to high SFP at 5 weeks of age, 3) ISA pullets are more strongly influenced by environmental conditions than DW pullets and 4) a level housing, which coincided with a large group size, increase the risk of SFP and feather damage during rearing.

    Ø Laying flocks

    In our sample, 49% of the laying flocks had severe damage at 40 weeks of age, compared with 71%, 65% and 53% of the rearing flocks at 15, 10 and 5 weeks of age, respectively. High fear of a SP at rearing and high SFP at 5 weeks of age related to high levels of feather damage at lay. In a floor system and at a large flock size higher levels of feather damage were recorded than in an aviary system and at a small flock size. An adjusted management on the laying farm (i.e. aerated blocks, presence of roosters or a radio playing) reduced levels of feather damage compared to standard management. DW flocks were more fearful of the SP and NO than ISA flocks. This study showed that factors during rearing and laying contributed to feather damage at 40 weeks of age.

    With the knowledge from the experimental and on-farm studies in this thesis, an assessment of the risk factors for SFP could be established. Risk factors for SFP are: high fear, stress and feather damage in DW parent stock, high fear of humans, especially for DW hens, litter disruption or limitation during rearing, large group sizes, and a floor or level system.

    Laying hen performance in different production systems; why do they differ and how to close the gap? Results of discussions with groups of farmers in The Netherlands, Switzerland and France, benchmarking and model calculations
    Leenstra, F.R. ; Maurer, V. ; Galea, F. ; Bestman, M.W.P. ; Amsler, Z. ; Visscher, J. ; Vermeij, I. ; Krimpen, M.M. van - \ 2014
    European Poultry Science 78 (2014)3. - ISSN 1612-9199 - p. 1 - 10.
    pluimveehouderij - hennen - uitloop - biologische landbouw - eierproductie - huisvesting van kippen - pluimveevoeding - dierenwelzijn - poultry farming - hens - outdoor run - organic farming - egg production - chicken housing - poultry feeding - animal welfare - egg-production systems - free-range - feather pecking - risk-factors - welfare - uk
    Free range and organic systems expose the laying hen more to unexpected events and adverse climatic conditions than barn and cage systems. In France, The Netherlands and Switzerland the requirements for a hen suitable to produce in free range and organic systems were discussed with farmers. The farmers preferred for these systems a more 'robust' hen, more specifically defined as a heavier hen with good eating capacity
    Goed in de veren blijven
    Jong, I.C. de; Gunnink, H. ; Rodenburg, T.B. ; Haas, E.N. de - \ 2014
    De Pluimveehouderij 44 (2014)9. - ISSN 0166-8250 - p. 24 - 25.
    pluimveehouderij - huisvesting van kippen - strooisel - verenpikken - dierenwelzijn - kuikens - hennen - diergedrag - diergezondheid - poultry farming - chicken housing - litter (plant) - feather pecking - animal welfare - chicks - hens - animal behaviour - animal health
    Is jong geleerd oud gedaan? WUR Livestock Research heeft onderzoek gedaan naar het belang van strooisel en huisvesting in de opfok voor veren pikken in de vroege leg.
    Leghennenhouderij in diep dal
    Horne, P.L.M. van; Wisman, J.H. - \ 2014
    Agri-monitor 2014 (2014)june. - ISSN 1383-6455 - 3
    pluimveehouderij - hennen - eieren - prijzen - bedrijfsresultaten in de landbouw - rendement - poultry farming - hens - eggs - prices - farm results - returns
    De leghennenhouders ontvangen nu al twee jaar eierprijzen fors onder de kostprijs. Vooral scharrelhennenhouders hebben moeite het hoofd boven water te houden. Het perspectief voor het komende halfjaar is niet gunstig.
    The ideal hen for organic and free range systems
    Maurer, V. ; Amsler, Z. ; Zeltner, E. ; Leenstra, F.R. ; Niekerk, T.G.C.M. van; Reuvekamp, B.F.J. ; Bestman, M.W.P. ; Verwer, C.M. ; Sambeek, F. ; Galea, F. - \ 2014
    pluimveehouderij - biologische landbouw - huisvesting van kippen - hennen - scharrelhouderij - genotypen - diergezondheid - poultry farming - organic farming - chicken housing - hens - free range husbandry - genotypes - animal health
    The aim of LowInputBreeds is to develop a system to evaluate layer genotypes in free range and organic systems and to optimise the management of those systems.
    Voorzichtig positief
    Niekerk, T.G.C.M. van; Reuvekamp, B.F.J. ; Gunnink, H. - \ 2014
    De Pluimveehouderij 44 (2014)1. - ISSN 0166-8250 - p. 18 - 19.
    pluimveehouderij - hennen - snavelkappen - diergedrag - verenpikken - huisvesting van kippen - dierenwelzijn - verlichting - diergezondheid - pluimvee - dierlijke productie - poultry farming - hens - debeaking - animal behaviour - feather pecking - chicken housing - animal welfare - lighting - animal health - poultry - animal production
    Livestock Research heeft twee reguliere leghennenbedrijven gevolgd die zijn begonnen ervaring op te doen met niet-snavelbehandelde hennen.
    Schadevrij op slachterij
    Niekerk, T.G.C.M. van; Reuvekamp, B.F.J. ; Gunnink, H. - \ 2014
    De Pluimveehouderij 44 (2014)4. - ISSN 0166-8250 - p. 28 - 30.
    pluimveehouderij - hennen - dierenwelzijn - slacht - transport - vangen van dieren - beschadigingen - poultry farming - hens - animal welfare - slaughter - transport - capture of animals - injuries
    Een juist management op het legbedrijf kan dierschade bij vangen en vervoer van uitgelegde hennen tegen gaan, zo blijkt uit onderzoek in de winterperiode.
    Kennis over P verfrissen
    Krimpen, M.M. van - \ 2014
    De Pluimveehouderij 44 (2014)2. - ISSN 0166-8250 - p. 31 - 31.
    pluimveehouderij - fosfor - hennen - pluimveevoeding - huisvesting van kippen - voedingsbehoeften - poultry farming - phosphorus - hens - poultry feeding - chicken housing - feed requirements
    Er loopt onderzoek naar de behoefte aan fosfor (P) van de huidige leghennen. Een dierexperiment loopt nog, op deze pagina de literatuurstudie.
    P-Requirement in modern laying hens - a literature review
    Lambert, W. ; Lange, L. de; Krimpen, M.M. van; Klis, J.D. van der; Star, L. - \ 2014
    Lelystad : Schothorst Feed Research (Report / Schothorst Feed Research 1326) - 89
    pluimveehouderij - hennen - eierproductie - pluimveevoeding - voersamenstelling - fosfor - voedingsbehoeften - poultry farming - hens - egg production - poultry feeding - feed formulation - phosphorus - feed requirements
    Fosfor is een belangrijke voedingsstof voor leghennen, onder andere voor botontwikkeling en eivorming, maar speelt ook een grote rol bij milieubelasting. Onderzoek naar de fosforbehoefte van leghennen is gedateerd. Daarom is een onderzoek gestart naar de fosforbehoefte van de huidige leghennen. De moderne leghen met een hoge productie en goede legpersistentie heeft waarschijnlijk een andere fosforbehoefte dan de hennen van 20 à 30 jaar geleden. Daarnaast hebben leghennen in alternatieve huisvestingssystemen een betere botontwikkeling, waardoor ze mogelijk toe kunnen met een lagere fosforvoorziening via het voer. Vaststellen van de fosforbehoefte, -benutting en -uitscheiding is noodzakelijk ter onderbouwing van de forfaitaire fosfaatuitscheiding en om de fosforvoorziening verantwoord te kunnen verlagen. De uitkomst van een literatuurstudie wordt hier toegelicht. De resultaten van het bijbehorende dierexperiment zullen later volgen.
    Ingrepenverbod pluimvee vraagt maximale inspanning
    Jong, I.C. de - \ 2014
    V-focus 2014 (2014)1. - ISSN 1574-1575 - p. 14 - 15.
    pluimveehouderij - dierenwelzijn - pluimvee - snavelkappen - verenpikken - landbouwbeleid - hennen - vleeskuikens - amputatie - diergedrag - dierlijke productie - poultry farming - animal welfare - poultry - debeaking - feather pecking - agricultural policy - hens - broilers - amputation - animal behaviour - animal production
    Aanvankelijk was 2021 het jaar waarin ingrepen als snavelbehandeling en het verwijderen van een deel van de achterste teen bij hanen uit de vermeerderingssector verboden zouden worden. Een motie van de Tweede Kamer zorgde echter voor het vervroegd ingaan van het verbod. De nieuwe afspraken vragen om maximale inspanning van alle betrokkenen.
    Database in de maak
    Niekerk, T.G.C.M. ; Reuvekamp, B.F.J. ; Bestman, M.W.P. - \ 2013
    De Pluimveehouderij 43 (2013)2. - ISSN 0166-8250 - p. 27 - 27.
    pluimveehouderij - databanken - uitloop - hennen - dierenwelzijn - huisvesting van kippen - verenpikken - poultry farming - databases - outdoor run - hens - animal welfare - chicken housing - feather pecking
    Het project Low Input Breeds zoekt de ideale uitloopkip. Na een eerste inventarisatie wordt nu in detail een groot aantal koppels gevolgd. Alvast wat eerste resultaten.
    Laag pathogene aviaire influenza virus infecties op pluimveebedrijven in Nederland
    Goot, J.A. van der; Verhagen, J. ; Gonzales, J. ; Backer, J.A. ; Bongers, J.H. ; Boender, G.J. ; Fouchier, R.A.M. ; Koch, G. - \ 2013
    Tijdschrift voor Diergeneeskunde 138 (2013)6. - ISSN 0040-7453 - p. 24 - 29.
    pluimveehouderij - pluimveeziekten - aviaire influenza - hennen - kippen - ziekte-incidentie - huisvesting, dieren - agrarische productiesystemen - uitloop - risicofactoren - poultry farming - poultry diseases - avian influenza - hens - fowls - disease incidence - animal housing - agricultural production systems - outdoor run - risk factors
    Dit artikel is een samenvatting van het rapport "Laag pathogene aviaire influenza virus iInfecties op pluimveebedrijven in Nederland" (CVI 2012). Dit rapport is geschreven naar aanleiding van vragen van het toenmalige Ministerie van Economische zaken, Landbouw en Innovatie. De vragen die werden gesteld zijn: - hebben pluimveebedrijven met vrije uitloop een grotere kans op introductie van LPAI virus infecties?; - is de kans op introductie gerelateerd aan wilde vogels?; - is er een periode in het jaar waarin het risico op infectie groter is? - kunnen er factoren geidentificeerd worden die de kans op introductie verminderen?
    Monitoring koppels met onbehandelde snavels
    Niekerk, Thea van - \ 2013
    poultry - poultry farming - beak - animal welfare - debeaking - hens - broilers - cocks - monitoring - animal health
    Rasing cockerels from free range egg production
    Leenstra, F.R. - \ 2013
    pluimvee - dierlijke productie - hennen - huisvesting, dieren - onderzoek - pluimveehouderij - dubbel-doel rassen - hanen - productiekosten - poultry - animal production - hens - animal housing - research - poultry farming - dual purpose breeds - cocks - production costs
    Wereldwijd worden de meeste haankuikens van leghennen bij de geboorte gedood. In het LowInputBreeds project hebben pluimveehouders laten weten dat zij op zoek zijn naar alternatieve maatregelen, waaronder de "dubbeldoel kip". Dit document licht de beste optie met betrekking tot productiekosten, efficiëntie en de markt voor speciaal gefokte merken leghennen toe.
    Noodmaatregelen tegen pikkerij
    Niekerk, T.G.C.M. van; Jong, I.C. de; Krimpen, M.M. van; Reuvekamp, B.F.J. ; Tuijl, O. van; Bestman, M. - \ 2013
    [Lelystad] : Livestock Research Wageningen UR - 32
    pluimveehouderij - verenpikken - hennen - vleeskuikens - vleeskuikenouderdieren - dierenwelzijn - diergedrag - diergezondheid - maatregelen - uitloop - huisvesting van kippen - dierlijke productie - pluimvee - poultry farming - feather pecking - hens - broilers - broiler breeders - animal welfare - animal behaviour - animal health - measures - outdoor run - chicken housing - animal production - poultry
    Deze uitgave geeft een kort overzicht van maatregelen die pluimveehouders kunnen treffen tegen beschadigend pikgedrag. De uitgave is bedoeld voor pluimveehouders met leghennen of vleeskuikenouderdieren.
    Onderbouwing BLk: van beloftes naar prestaties
    Hopster, Hans - \ 2013
    animal welfare - animal health - certification - animal housing - poultry - hens - pigs - poultry farming - pig farming
    Grond met gerelateerde voedselincidenten met dioxines en PCB's
    Hoogenboom, L.A.P. ; Traag, W.A. - \ 2013
    Wageningen : Rikilt - Institute of Food Safety (Rapport / RIKILT, Institute of Food Safety 2013.012) - 33
    bodemverontreiniging - ecotoxicologie - dioxinen - polychloorbifenylen - veevoeder - voederveiligheid - verontreinigde grond - voedselveiligheid - inventarisaties - schapenhouderij - pluimveehouderij - hennen - soil pollution - ecotoxicology - dioxins - polychlorinated biphenyls - fodder - feed safety - contaminated soil - food safety - inventories - sheep farming - poultry farming - hens
    Dioxines en PCB's blijven de agenda van de contaminanten beheersen. Waar het in eerste instantie een probleem van vuilverbranding was, later traden voergerelateerde incidenten met andere bronnen op de voorgrond. Nu deze (voergerelateerde) bronnen onder controle zijn, lijkt het milieu een grotere rol te spelen als bron voor dioxines en PCB's. Anders dan bij voeders zijn er voor grond op agrarische bedrijven geen duidelijke normen, die moeten voorkómen dat dierlijke producten besmet raken. Het is duidelijk dat dieren, die grazen of scharrelen, een bepaalde hoeveelheid grond kunnen opnemen. Bij koeien wordt uitgegaan van 4% van de droge stof. Bij schapen, die het gehele jaar buiten zijn, zou dat nog wel hoger kunnen uitvallen. Dit rapport geeft een literatuuroverzicht van bekende onderzoeksresultaten.
    Immunogenetic analysis of natural antibody isotypes in laying hens
    Sun, Y. - \ 2013
    Wageningen University. Promotor(en): Johan van Arendonk, co-promotor(en): Jan van der Poel; Henk Parmentier. - S.l. : s.n. - ISBN 9789461736796 - 192
    hennen - pluimvee - immunogenetica - genetische analyse - antilichamen - isotopen - overleving - genetische parameters - verenpikken - dierveredeling - hens - poultry - immunogenetics - genetic analysis - antibodies - isotopes - survival - genetic parameters - feather pecking - animal breeding

    Worldwide, especially in Europe, poultry industry is undergoing important changes including ban of the battery housing system and prohibition of beak trimming. The former can facilitate more spread of infectious diseases, and the latter will contribute to higher mortality because of severe feather pecking. Furthermore, given the growing social concern about food safety and human health, abundant use of antibiotics will either be prohibited or restricted. These changes further emphasize the importance of implementing general disease resistance in layers breeding goals next to maintaining high production. The aim of this thesis was to find proper traits which are associated with laying hens survival, and reveal genetic architecture and background underlying the traits. Natural antibody (NAb), which are the antibodies present in normal healthy animals in the absence of a deliberate antigen exposure are an important humoral part of innate immunity. The relationships between survival and NAb isotype titers were firstly investigated by the logistic regression analysis in a population of laying hens from 12 purebred lines. The results indicated that NAb, especially the IgM isotype titers at young age was predictive for survival of a laying period. Genetic parameters of NAb isotypes IgM and IgG titers were estimated in the same population. The estimation showed that both NAb isotypes are moderate to high heritable traits which were possible to breed for. An association study revealed different QTL or SNP markers for NAb isotypes titers. The majority of the commercial laying hens are crossbred. Therefore, the relationships between NAb isotype titers and survival were further investigated in crossbred laying hens. However, a consistent relationship as in the purebred was not found. This confirmed the speculation that non-health-related causes of mortality (severe feather pecking) overruled the anticipated relationships between NAb isotype titers and survival in birds with intact beaks. Overall, the present studies indicate that it is possible to implement NAb especially the IgM isotype titers into the breeding goals of laying hens to improve the health-related survival.

    Quality handling : a multimedia-based cognitive-behavioural intervention program, improving attitudes and handling behaviours of stockpeople in livestock farming
    Ruis, Markus - \ 2013
    animal production - dairy cattle - beef cattle - hens - animal behaviour - animal health - training - education - human-animal relationships - animal welfare
    Meer zicht op stallicht
    Niekerk, T.G.C.M. van; Reuvekamp, B.F.J. - \ 2013
    De Pluimveehouderij 43 (2013)6. - ISSN 0166-8250 - p. 29 - 29.
    pluimveehouderij - verlichting - huisvesting van kippen - dierenwelzijn - hennen - daglicht - pluimvee - dierlijke productie - poultry farming - lighting - chicken housing - animal welfare - hens - daylight - poultry - animal production
    In een klein onderzoek is bekeken aan welk lichtspectrum leghennen in praktijkstallen worden blootgesteld. Enkele resultaten.
    Maatregelen ter vermindering van fijnstofemissie uit de pluimveehouderij: validatie van een oliefilmrobot op een leghennenbedrijf = Measures to reduce fine dust emission from poultry houses: validation of an oil spraying robot on a layer farm
    Winkel, A. ; Nijeboer, G.M. ; Huis in 'T Veld, J.W.H. ; Blanken, K. ; Schilder, H. ; Hattum, T.G. van; Ogink, N.W.M. - \ 2013
    Lelystad : Wageningen UR Livestock Research (Rapport / Wageningen UR Livestock Research 686) - 26
    hennen - huisvesting van kippen - pluimveehouderij - fijn stof - emissie - hens - chicken housing - poultry farming - particulate matter - emission
    In this study, the emission reduction of an oil film robot was determined through validation measurements on a layer farm with houses with floor housing.
    Maatregelen ter vermindering van fijnstofemissie uit de pluimveehouderij: validatie van een ionisatiesysteem op leghennenbedrijven = Measures to reduce fine dust emission from poultry houses: validation of an ionisation system on layer farms
    Winkel, A. ; Nijeboer, G.M. ; Huis in 'T Veld, J.W.H. ; Ogink, N.W.M. - \ 2013
    Lelystad : Wageningen UR Livestock Research (Rapport / Wageningen UR Livestock Research 685) - 25
    hennen - pluimveehouderij - fijn stof - emissie - luchtionisatie - mitigatie - hens - poultry farming - particulate matter - emission - air ionization - mitigation
    In this study, the fine dust emission reduction of an ionization system was determined through validation measurements on layer farms.
    Maatregelen ter vermindering van de fijnstofemissie uit pluimveestallen: effecten van het aanbrengen van een aangezuurde waterfilm op het strooisel bij leghennen in volièresystemen = Measures to reduce fine dust emission from poultry houses: effects of application of an acidified water film on the litter floor of laying hen houses with aviary housing systems
    Harn, J. van; Ellen, H.H. ; Emous, R.A. van; Ogink, N.W.M. - \ 2013
    Lelystad : Wageningen UR Livestock Research (Rapport / Wageningen UR Livestock Research 573) - 22
    hennen - pluimveehouderij - strooisel - huisvesting van kippen - fijn stof - ammoniakemissie - stankemissie - emissie - hens - poultry farming - litter (plant) - chicken housing - particulate matter - ammonia emission - odour emission - emission
    This report describes the effects of application of an acidified water film onto the litter floor of aviary housing for laying hens on fine dust, ammonia and odour emissions.
    Op zoek naar de ideale hen
    Leenstra, F.R. ; Bestman, M.W.P. - \ 2013
    In: Biologisch ondernemen : legpluimvee / Janmaat, L., Driebergen : Louis Bolk Instituut - p. 12 - 13.
    dierveredeling - biologische landbouw - pluimveehouderij - hennen - selectief fokken - selectie - eigenschappen - animal breeding - organic farming - poultry farming - hens - selective breeding - selection - properties
    Heeft de biologische pluimveehouderij een ander type hen nodig dan de reguliere houderijsystemen? Is zo’n hen beschikbaar of moet die nog worden gefokt? Wat wordt verstaan onder ‘de’ biologische pluimveehouderij? Zijn dat bedrijven met 18.000 hennen die alleen mengvoer voeren of zijn dat bedrijven met eigen voer verbouw of met een koppeltje van 100-200 dieren die de restjes op het gemengd bedrijf moeten opeten?
    Invloed van UV-licht, vezelrijk voer of strooisel in de vroege opfok op verenpikken in opfok en legperiode = Effect of UV-light, high fiber feed or litter provision in early rearing on feather pecking in rearing and laying period
    Niekerk, T.G.C.M. van; Jong, I.C. de; Krimpen, M.M. van; Reuvekamp, B.F.J. ; Haas, E.N. de - \ 2013
    Lelystad : Wageningen UR Livestock Research (Rapport / Wageningen UR Livestock Research 671) - 37
    pluimveehouderij - pluimvee - dierlijke productie - dierenwelzijn - hennen - huisvesting, dieren - diergedrag - diervoeding - licht - verenpikken - voersamenstelling - vezelrijke diëten - pluimveevoeding - poultry farming - poultry - animal production - animal welfare - hens - animal housing - animal behaviour - animal nutrition - light - feather pecking - feed formulation - high fiber diets - poultry feeding
    Research to reduce featherpecking through UV-light, high fiber feed or litter provision in early rearing. Apart from the effects of these three factors, also the interactions are investigated.
    Overzicht van maatregelen om de ammoniakemissie uit de veehouderij te beperken
    Smits, M.C.J. ; Aarnink, A.J.A. ; Ellen, H.H. ; Groenestein, C.M. - \ 2013
    Lelystad : Wageningen UR Livestock Research (Rapport / Wageningen UR Livestock Research 645) - 35
    melkveehouderij - varkenshouderij - intensieve veehouderij - hennen - eierproductie - ammoniakemissie - luchtverontreiniging - ondersteunende maatregelen - stalinrichting - natura 2000 - dairy farming - pig farming - intensive livestock farming - hens - egg production - ammonia emission - air pollution - support measures - animal housing design - natura 2000
    Present and future possibilities are described to reduce ammonia emissions from livestock production in or near Natura 2000 areas.
    Quickscan van de gegevensverzameling voor duurzaamheid in de veehouderij
    Napel, J. ten; Engelsma, K.A. - \ 2012
    Lelystad : Wageningen UR Livestock Research (Rapport / Wageningen UR Livestock Research 715) - 35
    dierveredeling - duurzaamheid (sustainability) - veehouderij - fokdoelen - dierenwelzijn - diergezondheid - rundvee - varkens - hennen - gegevens verzamelen - animal breeding - sustainability - livestock farming - breeding aims - animal welfare - animal health - cattle - pigs - hens - data collection
    Utilising monitoring for sustainability in breeding of farm animals.
    Biologisch ondernemen : legpluimvee
    Janmaat, L. ; Asseldonk, T. van; Bestman, M.W.P. ; Bruggen, M. van; Daniels, L. ; Groot, M. ; Krimpen, M. van; Leenstra, F.R. ; Paardekooper, R. ; Verwer, C.M. ; Wagenaar, J.P. - \ 2012
    Driebergen : Louis Bolk Instituut - 27
    pluimvee - pluimveehouderij - biologische landbouw - ondernemerschap - duurzame veehouderij - hennen - kennisoverdracht - agrarische bedrijfsvoering - poultry - poultry farming - organic farming - entrepreneurship - sustainable animal husbandry - hens - knowledge transfer - farm management
    Biologisch Ondernemen is een speciale uitgave van het bedrijfsnetwerk biologische pluimveehouderij.
    Well-Fair Eggs - Op expeditie naar duurzame eierproductie
    Groot Koerkamp, Peter - \ 2012
    egg production - sustainability - poultry farming - animal welfare - animal health - chicken housing - hens - poultry - animal production
    Opfok, een zaak van opfokker én leghennenhouder
    Wagenaar, J.P. ; Kempen, I. - \ 2012
    BioKennis bericht Pluimveevlees & eieren (2012)12.
    hennen - diergezondheid - dierenwelzijn - huisvesting van kippen - biologische landbouw - pluimveehouderij - pluimvee - dierlijke productie - hens - animal health - animal welfare - chicken housing - organic farming - poultry farming - poultry - animal production
    Leghennenhouder willen dat de overgang van de opfokstal naar de legstal zo vlot mogelijk verloopt. Een bezoek aan de opfokker kan zeker bij helpen bij een goede voorbereiding. Dit BioKennisbericht gaat in op de volgende vragen: wat kun je vragen aan de opfokker? Wat kun je met deze infomatie op je eigen bedrijf doen? Hoe begeleid je optimaal een opfokhen naar leghen?
    Resultaten van het toepassen van het Welfare Quality®-meetprotocol
    Jong, I.C. de; Niekerk, T.G.C.M. van - \ 2012
    Tijdschrift voor Diergeneeskunde 137 (2012)11. - ISSN 0040-7453 - p. 748 - 751.
    dierenwelzijn - pluimveehouderij - vleeskuikens - hennen - meting - protocollen - monitoring - dierlijke productie - agrarische bedrijfsvoering - pluimvee - animal welfare - poultry farming - broilers - hens - measurement - protocols - monitoring - animal production - farm management - poultry
    In het TvD van september 2012 is geschetst wat de Welfare-Quality®-protocollen voor het meten van het welzijn van leghennen en vleeskuikens inhouden en hoe men van individuele welzijnsmetingen kan komen tot een eindbeoordeling van een koppel. Dit artikel gaat in op de resultaten van metingen bij koppels vleeskuikens en leghennen en hoe een pluimveehouder of bedrijfsbegeleider de metingen kan gebruiken als managementsturingsinstrument.
    NH3 onder de duim : 2. Voeding
    Veldkamp, T. ; Harn, J. van; Klis, J.D. van der; Star, L. - \ 2012
    De Pluimveehouderij 42 (2012)11. - ISSN 0166-8250 - p. 14 - 15.
    pluimveehouderij - pluimveevoeding - vleeskuikens - kalkoenen - hennen - eenden - ammoniakemissie - maatregelen - poultry farming - poultry feeding - broilers - turkeys - hens - ducks - ammonia emission - measures
    Het effect van voeding op de reductie van ammoniakemissie op pluimveebedrijven is door Wageningen UR Livestock Research en Schothorst Feed Research onderzocht.
    NH3 onder de duim : 1. Management- en huisvestingsmaatregelen
    Veldkamp, T. ; Aarnink, A.J.A. ; Ellen, H.H. ; Harn, J. van - \ 2012
    De Pluimveehouderij 42 (2012)11. - ISSN 0166-8250 - p. 12 - 14.
    pluimveehouderij - hennen - vleeskuikens - kalkoenen - eenden - huisvesting van kippen - ammoniakemissie - maatregelen - dierenwelzijn - dierlijke productie - pluimvee - poultry farming - hens - broilers - turkeys - ducks - chicken housing - ammonia emission - measures - animal welfare - animal production - poultry
    Het effect van huisvestings- en managementmaatregelen op de ammoniakemissie bij leghennen, vleeskuikens, kalkoenen en eenden is door Wageningen UR Livestock Research onderzocht.
    Competitiveness of the EU egg industry
    Horne, P.L.M. van - \ 2012
    The Hague : LEI, part of Wageningen UR (LEI-report : Markets & chains ) - ISBN 9789086155989 - 51
    eieren - eipoeder - import - heffingen - invoerrechten - landbouwprijzen - prijzen - europese unie - pluimvee - dierlijke productie - hennen - dierenwelzijn - handel - markten - eggs - dried egg - imports - levies - import levies - agricultural prices - prices - european union - poultry - animal production - hens - animal welfare - trade - markets
    Egg producers in the EU have to comply with legislation dealing with environmental protection, animal welfare and food safety. From 1 January 2012 keeping hens in conventional cages was prohibited and egg producers had to change to either enriched cages or alternative housing systems. The result of all this legislation is an increase in the cost of producing eggs. At the same time the EU is negotiating with other countries or groups of countries to liberalise trade in agricultural products. These multi- or bilateral negotiations are designed to further liberalise trade by either further reducing import tariffs or removing them altogether. In this report the impact of lowering import tariffs on the competitiveness of the EU egg industry is studied. The results show that the offer price of whole egg powder in 2012 of some third countries is close to the average EU price. Despite the current import tariffs on whole egg powder, the third countries can be competitive on the EU market. In a scenario with a 50% lower import tariff, all third countries have a lower offer price of whole egg powder compared to the EU egg industry.
    Emissies uit een opfokleghennenstal met chemische wasser en bypass. : Meetprogramma Integraal Duurzame Stallen
    Mosquera Losada, J. ; Hol, J.M.G. ; Huis in 'T Veld, J.W.H. ; Ploegaert, J.P.M. ; Lovink, E. ; Ogink, N.W.M. - \ 2012
    Lelystad : Wageningen UR Livestock Research (Rapport / Wageningen UR Livestock Research 609) - 39
    hennen - pluimveehouderij - huisvesting van kippen - reinigers - ammoniak - ammoniakemissie - stankemissie - fijn stof - methaan - distikstofmonoxide - emissie - hens - poultry farming - chicken housing - scrubbers - ammonia - ammonia emission - odour emission - particulate matter - methane - nitrous oxide - emission
    This study reports the emissions of ammonia, odour, fine dust (PM10 and PM2.5), methane and nitrous oxide from a pullet rearing housing system with a chemical air scrubber and bypass.
    Maatregelen t.b.v. een betere groei van opfokhennen
    Wagenaar, J.P. ; Verwer, C. - \ 2012
    Wageningen : Wageningen UR - 31 p.
    hennen - kippen - pluimveehouderij - biologische landbouw - stress - vaccinatie - dierenwelzijn - pluimvee - dierlijke productie - hens - fowls - poultry farming - organic farming - stress - vaccination - animal welfare - poultry - animal production
    In dit project is gekeken welke maatregelen genomen kunnen worden om de groei van biologische opfokhennen te verbeteren, gegeven een huidig toegepast vaccinatieschema. Het gaat hierbij om maatregelen die al toegepast worden en om nieuwe maatregelen die in potentie een positief effect op de groei en ontwikkeling van opfokhennen hebben. Naast een literatuurstudie is ook samen met de praktijk gekeken naar geschikte maatregelen.
    Minder stof uit volière
    Harn, J. van; Ellen, H.H. ; Ogink, N.W.M. - \ 2012
    De Pluimveehouderij 42 (2012). - ISSN 0166-8250 - p. 32 - 33.
    pluimveehouderij - hennen - fijn stof - stofbestrijding - ammoniakemissie - stalklimaat - strooisel - luchtverontreiniging - verneveling - poultry farming - hens - particulate matter - dust control - ammonia emission - stall climate - litter (plant) - air pollution - nebulization
    Een waterfilm op het strooisel is effectief tegen fijnstofemissie uit volièrestallen. De ammoniakemissie stijgt echter wel. Dat blijkt uit oriënterend Wagenings onderzoek.
    Verlagen van uitval bij leghennen
    Niekerk, T.G.C.M. van; Bestman, M.W.P. ; Wagenaar, J.P. ; Reuvekamp, B.F.J. ; Bronneberg, R. ; Vriens, R. ; Westerbeek, F. ; Westendorp, S. - \ 2012
    Lelystad : Wageningen UR Livestock Research - 48
    pluimveehouderij - pluimvee - hennen - dierenwelzijn - diergezondheid - dierziektepreventie - pluimveeziekten - kippenziekten - biologische landbouw - poultry farming - poultry - hens - animal welfare - animal health - animal disease prevention - poultry diseases - fowl diseases - organic farming
    Dit boekje geeft informatie waarmee uitval bij leghennen voorkomen kan worden. Het boekje is opgedeeld in twee delen: 1. Preventie en herkenning van uitval; 2. Belangrijke uitvalsoorzaken. Uitval is het resultaat van iets dat in het voorliggende traject fout gegaan is. Om uitval zoveel mogelijk te verminderen, is het dan ook van belang om dit voortraject zo goed mogelijk te laten verlopen. Dit kan gerealiseerd worden via houderij en management, en daarmee optimalisatie van dierenwelzijn en diergezondheid. Het eerste deel van dit boekje richt zich op een aantal specifieke aandachtspunten ter preventie van gezondheidsproblemen. Ook wordt aandacht besteed aan vroege herkenning van problemen. Het tweede deel van het boekje gaat over de meest voorkomende uitvalsoorzaken. Het blijkt in de praktijk niet altijd even makkelijk voor pluimveehouders om een goede oorzaak en gevolg vast te stellen bij uitval van dieren. Hoewel het te allen tijde belangrijk is om bij problemen een dierenarts in te schakelen, is het goed dat u als pluimveehouder zelf ook enige anatomische en ziektekundige basiskennis heeft. Het voorkomen of terugdringen van uitval is immers lang niet altijd een kwestie van medicatie, maar vaak en vooral een kwestie van het nemen van de juiste management-maatregelen. Het juist inschatten van de oorzaak van uitval of van de mogelijke ernst van een bepaalde situatie is belangrijk, omdat dit doorgaans al een indicatie geeft van waar het management bijgestuurd of aangescherpt moet worden.
    Robuuste dames
    Krimpen, M.M. van; Binnendijk, G.P. ; Anker, I. van den; Heetkamp, M.J.W. ; Kwakkel, R.P. ; Brand, H. van den - \ 2012
    De Pluimveehouderij 42 (2012)9. - ISSN 0166-8250 - p. 28 - 29.
    pluimveehouderij - hennen - eierproductie - huisvesting van kippen - stalklimaat - verenkleed - voeropname - dierlijke productie - dierenwelzijn - poultry farming - hens - egg production - chicken housing - stall climate - plumage - feed intake - animal production - animal welfare
    Het aanpassingsvermogen van leghennen is indrukwekkend. Andere temperatuur, andere huisvesting? De eierproductie blijft gewoon op peil! Onderzoek van WUR Livestock Research laat dat zien.
    Welfare Quality assessment protocol for laying hens = Welfare Quality assessment protocol voor leghennen
    Niekerk, T.G.C.M. van; Gunnink, H. ; Reenen, C.G. van - \ 2012
    Lelystad : Wageningen UR Livestock Research (Report / Wageningen UR Livestock Research 589) - 63
    dierenwelzijn - dierlijke productie - hennen - pluimvee - huisvesting, dieren - diergedrag - diergezondheid - diervoeding - meting - animal welfare - animal production - hens - poultry - animal housing - animal behaviour - animal health - animal nutrition - measurement
    Results of a study on the Welfare Quality® assessment protocol for laying hens. It reports the development of the integration of welfare assessment as scores per criteria as well as simplification of the Welfare Quality® assessment protocol. Results are given from assessment of 122 farms.
    Héél anders kippen houden
    Weeghel, Ellen van - \ 2012
    poultry farming - chicken housing - stalls - animal welfare - egg production - sustainability - hens
    Well-Fair Eggs : Samenwerken voor duurzame eieren biedt kansen!
    Weeghel, H.J.E. van; Groot Koerkamp, P.W.G. ; Cornelissen, J.M.R. - \ 2012
    Wageningen UR Livestock Research
    dierenwelzijn - pluimveehouderij - eierproductie - duurzaamheid (sustainability) - diergezondheid - dierlijke productie - hennen - pluimvee - animal welfare - poultry farming - egg production - sustainability - animal health - animal production - hens - poultry
    In deze brochure willen de auteurs laten zien waarover duurzame productie van eieren en eiproducten gaat. Zij laten ontwerpen van integraal duurzame productie van eieren zien en wat hiervoor nodig is om dit te bereiken. In deze brochure gaat het over nieuwe oplossingen in de keten van dieren, nutriënten en verwerking.
    Alternatief voor doden eendagskuikens
    Woelders, H. - \ 2012
    V-focus 9 (2012)5a. - ISSN 1574-1575 - p. 46 - 47.
    pluimveehouderij - kuikens - dierenwelzijn - doden van dieren - dierlijke productie - pluimvee - hennen - diergezondheid - poultry farming - chicks - animal welfare - killing of animals - animal production - poultry - hens - animal health
    Zo’n 45 miljoen eendagskuikens worden jaarlijks gedood in Nederland, omdat ze ongeschikt zijn voor de eierproductie of voor kippenvlees. Al tientallen jaren is er maatschappelijk verzet tegen. Wageningen UR zoekt sinds 2005 naar alternatieven. Een andere mogelijkheid dan het doden lijkt dichterbij te komen.
    Protocol voor het meten van dierenwelzijn bij vleeskuikens en leghennen.
    Niekerk, T.G.C.M. van; Jong, I.C. de - \ 2012
    Tijdschrift voor Diergeneeskunde 137 (2012)9. - ISSN 0040-7453 - p. 608 - 611.
    pluimveehouderij - dierenwelzijn - protocollen - meting - vleeskuikens - hennen - pluimvee - poultry farming - animal welfare - protocols - measurement - broilers - hens - poultry
    Dierenwelzijn is een veelomvattend begrip. Voor leghennen en vleeskuikens zijn protocollen beschikbaar om het welzijn op het bedrijf vast te stellen. Deze zijn beschreven door Welfare Quality en in 2011 op grote schaal getoetst door WUR Livestock Research. Deze protocollen kunnen worden gebruikt als managementsturingsinstrument voor de veehouder.
    Description of the calculations to transform measures into criterion for the Welfare Quality assessment protocol for laying hens = Beschrijving van de berekeningen om metingen om te zetten naar criteria scores voor het Welfare Quality protocol voor leghennen
    Niekerk, T.G.C.M. van; Thissen, J.T.N.M. ; Reenen, C.G. van - \ 2012
    Lelystad : Wageningen UR Livestock Research (Report / Wageningen UR Livestock Research 590) - 50
    pluimveehouderij - hennen - eierproductie - dierenwelzijn - diergedrag - diergezondheid - huisvesting, dieren - diervoeding - methodologie - meting - evaluatie - poultry farming - hens - egg production - animal welfare - animal behaviour - animal health - animal housing - animal nutrition - methodology - measurement - evaluation
    Results of a study on the Welfare Quality assessment protocol for laying hens. It reports the calculations for transformation of welfare measures into scores per criteria of the Welfare Quality assessment protocol.
    Kostprijs opfokleghen fors toegenomen : kostprijsberekening opfok van leghennen aangepast met uitgangspunten 2012
    Vermeij, I. ; Horne, P.L.M. van - \ 2012
    De Pluimveehouderij 42 (2012)7. - ISSN 0166-8250 - p. 34 - 36.
    pluimveehouderij - kostenanalyse - agrarische bedrijfsvoering - hennen - huisvesting van kippen - kuikens - investering - poultry farming - cost analysis - farm management - hens - chicken housing - chicks - investment
    De kostprijzen liggen ruim 40 eurocent per hen hoger dan in de vorige berekening uit 2010. De kostprijs per afgeleverde hen staat in tabel 1. In de 2e tabel staan de investeringskosten per hen en de kuikenprijs. In de 3e tabel staat de gevoeligheidsanalyse kostprijs 17-weekse hen.
    Maatregelen ter vermindering van fijnstofemissie uit de pluimveehouderij: biofiltratie van ventilatielucht uit een mestdroogsysteem bij een leghennenstal = Measures to reduce fine dust emission from poultry houses: biofiltration of exhaust air of a manure drying system at a barn for laying hens
    Melse, R.W. ; Hol, J.M.G. - \ 2012
    Lelystad : Wageningen UR Livestock Research (Rapport / Wageningen UR Livestock Research 498) - 30
    pluimveehouderij - hennen - eierproductie - ammoniakemissie - fijn stof - emissie - biologische filtratie - dierlijke meststoffen - stalklimaat - poultry farming - hens - egg production - ammonia emission - particulate matter - emission - biological filtration - animal manures - stall climate
    In this study the emission reduction of ammonia, odour and fine dust (PM10) was deteremined for a biofilter treating exhaust air from a poultry manure drying installation.
    Maatregelen ter vermindering van fijnstofemissie uit de pluimveehouderij: optimalisatie aanbrengen oliefilm op strooisel bij leghennen in volièrehuisvesting = Measures to reduce fine dust emission from poultry: optimization of oil application on litter of aviary housing for layers
    Winkel, A. ; Emous, R.A. van; Mosquera Losada, J. ; Nijeboer, G.M. ; Hattum, T.G. van; Riel, J.W. van; Aarnink, A.J.A. ; Ogink, N.W.M. - \ 2012
    Lelystad : Wageningen UR Livestock Research (Rapport / Wageningen UR Livestock Research 597) - 36
    pluimveehouderij - hennen - eierproductie - huisvesting van kippen - volières - zaadoliën - vernevelen - strooisel - fijn stof - emissie - luchtverontreiniging - stalklimaat - poultry farming - hens - egg production - chicken housing - aviaries - seed oils - fogging - litter (plant) - particulate matter - emission - air pollution - stall climate
    This report describes research into the application of a film of rapeseed oil on the litter floor of aviary housing for laying hens as a mitigation measure for particulate matter. Distribution of the oil film over the floor and dose-effect relationships were investigated. Emission reductions for PM10 were 31, 64 and 81% at dosages of 15, 30 and 45 ml/m2 respectively.
    Reductie van ammoniakemissie op pluimveebedrijven via voeding = Reduction of ammonia emission from poultry houses by nutrition
    Veldkamp, T. ; Star, L. ; Klis, J.D. van der; Harn, J. van - \ 2012
    Lelystad : Wageningen UR Livestock Research (Rapport / Wageningen UR Livestock Research 490) - 38
    pluimveehouderij - pluimveevoeding - ammoniakemissie - voersamenstelling - diergezondheid - dierenwelzijn - luchtverontreiniging - stalklimaat - dierlijke productie - pluimvee - vleeskuikens - hennen - diervoeding - poultry farming - poultry feeding - ammonia emission - feed formulation - animal health - animal welfare - air pollution - stall climate - animal production - poultry - broilers - hens - animal nutrition
    In this study the possibilities are shown to reduce ammonia emission from poultry houses by nutrition.
    Exploring ecological sustainability in the production chain of organic eggs
    Dekker, S.E.M. - \ 2012
    Wageningen University. Promotor(en): Peter Groot Koerkamp; Imke de Boer, co-promotor(en): Andre Aarnink. - S.l. : s.n. - ISBN 9789461731494 - 175
    pluimveehouderij - hennen - eierproductie - eieren - biologische landbouw - milieueffect - ecologische beoordeling - duurzame veehouderij - ketenmanagement - nederland - poultry farming - hens - egg production - eggs - organic farming - environmental impact - ecological assessment - sustainable animal husbandry - supply chain management - netherlands
    De visie van de biologische landbouw op duurzaamheid is verwoord door IFOAM in hun doelstelling en in de 4 beginselen van de biologische landbouw en is vertaald in diverse praktische regels voor biologische productie. In dit proefschrift noemen we deze visie het biologisch-ethisch kader. De hoofddoelstelling van dit proefschrift was het vaststellen van het effect van dit biologisch-ethisch kader op de integrale milieubelasting van biologische eierproductie in Nederland. Deze doelstelling werd benaderd vanuit 3 invalshoeken: 1) het vaststellen van het verschil in integrale milieubelasting van eierproductie met en zonder het biologisch-ethisch kader, 2) het identificeren van de belangrijkste milieuproblemen in het bestaande biologische eierproductiesysteem in Nederland en 3) het verkennen van mogelijkheden om de integrale milieubelasting van Nederlandse biologische eierproductie te verbeteren binnen de grenzen van het biologisch-ethisch kader.
    Laag pathogene aviaire influenza virus infecties op pluimveebedrijven in Nederland
    Goot, J.A. van der; Verhagen, J. ; Gonzales, J. ; Backer, J.A. ; Bongers, J.H. ; Boender, G.J. ; Koch, G. - \ 2012
    Wageningen [etc.] : Wageningen Universiteit en Researchcentrum, Centraal Veterinair Instituut [etc.] (CVI rapport / Centraal Veterinair Instituut 12/CVI0036) - 31
    pluimveehouderij - aviaire influenza - dierenwelzijn - diergezondheid - huisvesting, dieren - pluimvee - hennen - kippen - dierlijke productie - dierziekten - uitloop - influenzavirussen - poultry farming - avian influenza - animal welfare - animal health - animal housing - poultry - hens - fowls - animal production - animal diseases - outdoor run - influenza viruses
    Laag Pathogene Aviaire Influenza (LPAI) is een aandoening bij pluimvee die wordt veroorzaakt door LPAI virussen. In Nederland worden elk jaar meer infecties met LPAI virussen op pluimveebedrijven gedetecteerd. In dit rapport is gekeken naar een aantal mogelijke oorzaken voor deze toename. Het vermoeden bestaat dat serologisch en/of virologisch positieve bedrijven vaker dan gemiddeld bedrijven zijn met vrije uitloop. De vraag is of dit werkelijk zo is, en zo ja welke maatregelen dan genomen kunnen worden om de kans op een introductie op een bedrijf met vrije uitloop te verminderen.
    Maatregelen ter vermindering van fijnstofemissie uit de pluimveehouderij: effect van een waterfilm op het strooisel op de fijnstofemissie bij leghennen in volièresystemen = Measures to reduce fine dust emission from poultry: effect of water spraying on bedding material on the fine dust emission in aviary housing systems for layers
    Harn, J. van; Ellen, H.H. ; Emous, R.A. van; Mosquera Losada, J. ; Nijeboer, G.M. ; Gerrits, F.A. ; Aarnink, A.J.A. ; Ogink, N.W.M. - \ 2012
    Lelystad : Wageningen UR Livestock Research (Rapport / Wageningen UR Livestock Research 425) - 23
    pluimveehouderij - hennen - eierproductie - stofbestrijding - fijn stof - ammoniakemissie - stankbestrijding - stalklimaat - luchtverontreiniging - verneveling - strooisel - poultry farming - hens - egg production - dust control - particulate matter - ammonia emission - odour abatement - stall climate - air pollution - nebulization - litter (plant)
    This reports describes the results of a research on the effects of spraying water on bedding material on the fine dust, ammonia and odor emissions of laying hens in aviary housing systems.
    Maatregelen ter vermindering van fijnstofemissie uit de pluimveehouderij: effecten van de aanbrengfrequentie van een waterfilm op het strooisel bij leghennen in volièresystemen = Measures to reduce fine dust from poultry housings: effects of the frequency of water sprayin on the litter floor in aviary housing systems for laying hens
    Harn, J. van; Ellen, H.H. ; Huis in 'T Veld, J.W.H. ; Ogink, N.W.M. - \ 2012
    Lelystad : Wageningen UR Livestock Research (Rapport / Wageningen UR Livestock Research 565) - 23
    pluimveehouderij - hennen - eierproductie - stofbestrijding - fijn stof - ammoniakemissie - stankbestrijding - stalklimaat - luchtverontreiniging - verneveling - frequentie - strooisel - poultry farming - hens - egg production - dust control - particulate matter - ammonia emission - odour abatement - stall climate - air pollution - nebulization - frequency - litter (plant)
    This report describes the effect of the frequency of spraying water (300 ml/m2) onto the litter floor of aviary housing for laying hens on PM10 and ammonia emissions.
    "Quality Handling" : a multimedia training program for animal handing
    Boivin, X. ; Ruis, M.A.W. ; Waiblinger, S. ; Mounaix, B. ; Windschnurer, I. ; Coleman, G. - \ 2012
    dierlijke productie - varkens - melkvee - vleesvee - hennen - diergedrag - diergezondheid - opleiding - onderwijs - dierenwelzijn - animal production - pigs - dairy cattle - beef cattle - hens - animal behaviour - animal health - training - education - animal welfare
    Poster van het trainingsprogramma "Quality Handling."
    "Quality Handling" of farm animals
    Boivin, X. ; Ruis, M.A.W. ; Waiblinger, S. ; Mounaix, B. ; Windschnurer, I. ; Coleman, G. - \ 2012
    dierlijke productie - varkens - melkvee - vleesvee - hennen - diergedrag - diergezondheid - opleiding - onderwijs - mens-dier relaties - dierenwelzijn - animal production - pigs - dairy cattle - beef cattle - hens - animal behaviour - animal health - training - education - human-animal relationships - animal welfare
    Poster over de "Quality Handling training" methode.
    Effect van huisvestings- en managementmaatregelen op ammoniakemissie bij leghennen, vleeskuikers, kalkoenen en eenden = Effects of housing and management on ammonia emissions fram laying hen, broiler, turkey and duck houses
    Harn, J. van; Ellen, H.H. ; Veldkamp, T. ; Aarnink, A.J.A. - \ 2012
    Wageningen : Wageningen UR Livestock Research (Rapport / Wageningen UR Livestock Research 560) - 32
    pluimveehouderij - hennen - eierproductie - vleeskuikens - kalkoenen - eenden - ammoniakemissie - huisvesting, dieren - dierenwelzijn - maatregelen - poultry farming - hens - egg production - broilers - turkeys - ducks - ammonia emission - animal housing - animal welfare - measures
    This report describes potential measures on housing and management to reduce ammonia emission from laying hen, broiler, turkey and duck houses.
    Effect van omgevingstemperatuur, kwaliteit verenkleed en huisvestingssysteem op energieverbruik en dierprestaties bij leghennen = Effect of ambient temperature, plumage condition, and housing system on energy partitioning and performance in laying hens
    Krimpen, M.M. van; Binnendijk, G.P. ; Anker, I. van den; Heetkamp, M.J.W. ; Kwakkel, R.P. ; Brand, H. van den - \ 2012
    Lelystad : Wageningen UR Livestock Research (Rapport / Wageningen UR Livestock Research 579) - 18
    pluimveehouderij - hennen - eierproductie - huisvesting van kippen - stalklimaat - lichaamsconditie - voeropname - dierenwelzijn - dierlijke productie - poultry farming - hens - egg production - chicken housing - stall climate - body condition - feed intake - animal welfare - animal production
    Despite rather extreme differences between treatments, rate of lay, egg weight and egg mass were not affected, indicating the adaptive capacity of laying hens to a broad range of environmental conditions.
    Maatregelen ter vermindering van fijnstofemissie uit de pluimveehouderij: validatie van een ionisatiefilter op leghennenbedrijven = Measures to reduce fine dust emission from poultry houses: validation of an ionisation filter on layer farms
    Winkel, A. ; Mosquera Losada, J. ; Hattum, T.G. van; Huis in 'T Veld, J.W.H. ; Nijeboer, G.M. ; Ogink, N.W.M. - \ 2012
    Lelystad : Wageningen UR Livestock Research (Rapport / Wageningen UR Livestock Research 440) - 26
    pluimveehouderij - hennen - eierproductie - filters - ionisatie - pluimveehokken - fijn stof - emissie - luchtverontreiniging - stalklimaat - poultry farming - hens - egg production - filters - ionization - poultry housing - particulate matter - emission - air pollution - stall climate
    In this study, the fine dust emission reduction of an ionization filter (electrostatic precipitator) was determined through validation measurements on layer farms.
    Effect van verdunde praktijkvoeders op de kwaliteit van het verenkleed, gedrag en dierprestaties bij opfok- en leghennen
    Krimpen, M.M. van; Binnendijk, G.P. ; Diepen, J.T.M. van - \ 2012
    Lelystad : Wageningen UR Livestock Research (Rapport / Wageningen UR Livestock Research 534) - 36
    pluimveehouderij - hennen - verenpikken - dierenwelzijn - pluimveevoeding - verenkleed - voersamenstelling - diergedrag - dierlijke productie - poultry farming - hens - feather pecking - animal welfare - poultry feeding - plumage - feed formulation - animal behaviour - animal production
    Feeding diluted rearing and layer diets, by applying common dilution sources, resulted in increased feeding related behaviour of both rearing and laying hens. These changes in time budgets could contribute to reduced levels of feather pecking behaviour and feather damage in rearing and laying hens.
    Kracht van Koeien
    Vrolijk, Maarten - \ 2012
    dairy farming - poultry farming - pig farming - animal welfare - sustainability - sustainable animal husbandry - animal housing - dairy cattle - poultry - hens - pigs - animal production
    Effecten van voeding op darmgezondheid van leghennen = Effects of nutrition on intestinal health of laying hens
    Veldkamp, T. ; Krimpen, M.M. van - \ 2012
    Lelystad : Wageningen UR Livestock Research (Rapport / Wageningen UR Livestock Research 548) - 27
    diergezondheid - pluimveevoeding - pluimveehouderij - hennen - spijsverteringskanaal - darmen - voersamenstelling - voedingsrantsoenen - voedertoevoegingen - biologische landbouw - dierenwelzijn - animal health - poultry feeding - poultry farming - hens - digestive tract - intestines - feed formulation - feed rations - feed additives - organic farming - animal welfare
    Intestinal health is of vital importance for health and welfare of laying hens and nutrition may have a significant contribution. Insoluble non-starch polysaccharides (NSP) and feed additives such as herbs, phytogenic material, probiotics and prebiotics, organic acids and enzymes may have a beneficial effect on intestinal health.
    "Quality Handling" a training program to reduce fear and stress in farm animals
    Boivin, X. ; Ruis, M.A.W. - \ 2011
    In: 4th Boehringer Ingelheim Expert Forum on farm animal well-being : May 27th 2011, Seville (Spain). - Ingelheim am Rhein : Boehringer Ingelheim Animal Health - p. 20 - 27.
    dierlijke productie - varkens - melkvee - vleesvee - hennen - diergedrag - diergezondheid - opleiding - onderwijs - mens-dier relaties - dierenwelzijn - animal production - pigs - dairy cattle - beef cattle - hens - animal behaviour - animal health - training - education - human-animal relationships - animal welfare
    Research programs such as the European Welfare Quality® program, have attempted to improve animal welfare by developing training programs for improving stockperson behaviour towards the animals. The authors will illustrate different approches in this paper, with a special focus on the Quality Handling program, a multi-media training for improving animal handling in pigs, laying hens and cattle farming.
    Auf der Suche nach der besten Freilandhenne : Erste Resultate des EU-Projektes «LowInputBreeds» bei Bio-/Freilandhennen
    Maurer, V. ; Zeltner, E. ; Amsler, Z. ; Niekerk, T.G.C.M. van; Leenstra, F.R. ; Reuvenkamp, B. ; Bestman, M.W.P. - \ 2011
    Schweizerische Geflügelzeitung 2011 (2011)2. - p. 17 - 19.
    hennen - dierveredeling - low input landbouw - eierproductie - pluimveehouderij - biologische landbouw - kippenrassen - hens - animal breeding - low input agriculture - egg production - poultry farming - organic farming - fowl breeds
    Welche Legehenne eignet sich für Freilandbetriebe? Welche Anforderungen stellen wir an eine solche Henne? Im EU-Projekt «LowInputBreeds» wird das untersucht und dieser Artikel stellt erste Resultate vor.
    Ethical Consideration in Livestock Breeding : proceedings of the first lowinputbreeds symposium, Wageningen 15-16 March 2011
    Leenstra, F.R. ; Jensen, K.K. ; Butler, G. ; Baker, B. ; Willer, H. ; Maurer, V. - \ 2011
    Frick, Switzerland : Research Institute of Organic Agriculture (FiBL) - ISBN 9783037362303 - 114
    agrarische productiesystemen - biologische landbouw - scharrelhouderij - rassen (dieren) - melkveehouderij - schapenhouderij - varkenshouderij - pluimveehouderij - hennen - bio-ethiek - biodiversiteit - dierethiek - dierenwelzijn - dierveredeling - conferenties - low input landbouw - agricultural production systems - organic farming - free range husbandry - breeds - dairy farming - sheep farming - pig farming - poultry farming - hens - bioethics - biodiversity - animal ethics - animal welfare - animal breeding - conferences - low input agriculture
    The aim of the symposium was to discuss the plans and progress in LowInputBreeds in an early stage of the EU-project with stakeholders. For the symposium farmers and policy workers from governmental and non-governmental organisations were invited. Special attention was paid to possible ethical issues in organic and free range systems of livestock production as considered by the LowInputBreeds project.
    Positief tot licht kritisch
    Niekerk, T.G.C.M. van - \ 2011
    De Pluimveehouderij 41 (2011)9. - ISSN 0166-8250 - p. 30 - 31.
    pluimveehouderij - snavelkappen - infraroodstraling - robots - dierenwelzijn - pluimvee - hennen - dierlijke productie - diergezondheid - poultry farming - debeaking - infrared radiation - robots - animal welfare - poultry - hens - animal production - animal health
    Infraroodsnavelbehandeling (IR) met een robot in de broederij werkt goed, al zijn er ook kleine kanttekeningen, zo blijkt uit een inventarisatie door Livestock Research in de praktijk.
    Low Input Breeds: search for ideal laying hen for free range and organic systems
    Leenstra, F.R. ; Maurer, V. ; Bestman, M.W.P. ; Zeltner, E. ; Niekerk, T.G.C.M. van; Sambeek, F. ; Reuvekamp, B.F.J. - \ 2011
    In: Proceedings 7th European Symposium on Poultry Genetics, Peebles, Scotland, UK, 5 - 7 October, 2011. - - p. 38 - 40.
    dierveredeling - biologische landbouw - low input landbouw - hennen - eierproductie - fokdoelen - pluimveehouderij - animal breeding - organic farming - low input agriculture - hens - egg production - breeding aims - poultry farming
    Powerpointpresentatie over onderzoek naar de fok van de ideale leghen voor biologische systemen en systemen met vrije uitloop.
    Maatregelen tegen verenpikkerij: wie van de drie?
    Niekerk, Thea van - \ 2011
    animal welfare - poultry farming - feather pecking - poultry feeding - roughage - animal production - hens - animal behaviour - animal health - animal nutrition - poultry
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