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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Opportunities for short rotation coppice production on free-range chicken farms in Flanders : Farmers' perceptions and cost-benefit analysis
Stadig, Lisanne M. ; Tuyttens, Frank A.M. ; Rodenburg, T.B. ; Verdonckt, Pieter ; Wauters, Erwin ; Borremans, Lieve ; Reubens, Bert - \ 2018
Renewable Agriculture and Food Systems (2018). - ISSN 1742-1705 - 10 p.
Economic analysis - farmer opinion - net present value - poultry - willow - wood chips

This paper focuses on systems producing short rotation coppice willows (SRCW) in chickens' free-range areas. We aim to map chicken farmers' motivation to implement SRCW, and to assess the economic viability of these systems. Semi-structured interviews were conducted with 18 free-range chicken farmers. Farmers agreed that chickens would prefer SRCW over grassland, which could benefit chicken welfare. They expected establishing an SRCW system would be labor intensive, and doubted if it would be a profitable investment. Some concerns of farmers might be taken away by exchanging information with farmers with SRCW experience. A partial budget analysis was performed to calculate the net present value (NPV) of six different scenarios, differing in the type of chickens, in whether the produced biomass was sold or valorized on-farm and in harvest pattern, all over a 23-yr period. The NPV was positive but low for all scenarios. A sensitivity analysis showed that changes in biomass yield, wood chip price, a price premium for poultry products and current fuel price were most likely to influence the NPV. A risk analysis revealed that NPVs were positive in the majority of the modeled cases. Scenarios in which biomass was used for on-farm heat production showed the highest risk of a negative NPV. A price premium for poultry products may be most effective at increasing profitability, but may only be feasible for farms selling directly to consumers. Establishing a solid market for biomass energy, including guaranteed demand and availability of appropriate machinery for cultivation, may mitigate farmers' concerns.

Weather correlates of Campylobacter prevalence in broilers at slaughter under tropical conditions in Sri Lanka
Kalupahana, R.S. ; Mughini-Gras, L. ; Kottawatta, S.A. ; Somarathne, S. ; Gamage, C. ; Wagenaar, J.A. - \ 2018
Epidemiology and Infection 146 (2018)8. - ISSN 0950-2688 - p. 972 - 979.
Campylobacter - poultry - seasonality - tropical weather
Campylobacter is the primary agent of human bacterial gastroenteritis worldwide. In contrast to temperate zones, weather effects on Campylobacter prevalence in broilers under tropical conditions are under-researched. We examined the association between weather and Campylobacter prevalence in slaughtered broilers in Sri Lanka, a tropical country with weather variations led by monsoons. Each month (October 2009–July 2011), 20–30 broiler batches referring to two semi-automated slaughterhouses from five Sri Lankan provinces were tested for Campylobacter contamination and analysed in relation to temperature, humidity and rainfall. Overall prevalence was 63.8% (95% CI 59.6–67.9%, n = 542), peaking in September–November. Each 1 °C increase in monthly mean temperature up to 26 °C increased Campylobacter-positive batches by 16.4% (95% CI 0.4–35.1%). For each 10 mm increase in monthly total rainfall up to 300 mm, Campylobacter-positive batches increased significantly by 0.8% (0.1–1.5%) at 1-month lag. For each 1% increase in relative humidity up to 80% at 1- and 2-month lags, Campylobacter-positive batches increased of respectively 4.2% (1.9–6.7%) and 4.0% (1.5–6.5), and decreased by 3.6% (2.6–4.6%) and 4.0% (2.6–5.4%) for unit increases above 80%. These results suggest that even in tropical countries without marked seasons, there are weather effects possibly reflecting Campylobacter potential to colonise its preferred host and/or survive in the environment.
Kuiken kan maximaal 36 uur zonder eten
Jong, Ingrid de - \ 2018
animal welfare - animal production - poultry - animal nutrition - animal health
Geen goed alternatief voor doden haantjes
Gremmen, Bart - \ 2018
animal welfare - animal production - poultry - hens - animal ethics - animal health
Identification of a practical and reliable method for the evaluation of litter moisture in turkey production
Vinco, L.J. ; Giacomelli, S. ; Campana, L. ; Chiari, M. ; Vitale, N. ; Lombardi, G. ; Veldkamp, T. ; Hocking, P.M. - \ 2018
British Poultry Science 59 (2018)1. - ISSN 0007-1668 - p. 7 - 12.
Bedding quality - environment - foot pad dermatitis - litter moisture - poultry - welfare
1. An experiment was conducted to compare 5 different methods for the evaluation of litter moisture. 2. For litter collection and assessment, 55 farms were selected, one shed from each farm was inspected and 9 points were identified within each shed. 3. For each device, used for the evaluation of litter moisture, mean and standard deviation of wetness measures per collection point were assessed. 4. The reliability and overall consistency between the 5 instruments used to measure wetness were high (α = 0.72). 5. Measurement of three out of the 9 collection points were sufficient to provide a reliable assessment of litter moisture throughout the shed. 6. Based on the direct correlation between litter moisture and footpad lesions, litter moisture measurement can be used as a resource based on-farm animal welfare indicator. 7. Among the 5 methods analysed, visual scoring is the most simple and practical, and therefore the best candidate to be used on-farm for animal welfare assessment.
Three stars for animal welfare
Bos, Bram - \ 2017
animal welfare - animal production - poultry - fowls - animal housing - animal behaviour - animal health
8 gamechangers voor een duurzame productie van gezond en veilig voedsel
Vogelezang, J.V.M. ; Angelino, Steven ; Dubbeldam, Ria - \ 2017
Topsector Agri & Food - 13 p.
animal welfare - animal production - cattle - pigs - poultry - animal ethics - animal housing
Alternatieven voor doden eendagshaantjes
Leenstra, Ferry - \ 2017
poultry farming - killing of animals - chicks - poultry - young animals - animal welfare - animal production - animal health
Losse bijlage bij rapport 'Onderzoek naar kritische succesfactoren voor een laag antibioticumgebruik bij vleeskuikens'
Wiegel, J. ; Holstege, M.M.C. ; Bouwstra, R.J. ; Lauwere, C.C. de; Kluivers-Poodt, M. ; Bokma-Bakker, M.H. - \ 2017
Wageningen : Wageningen UR Livestock Research (Livestock Research rapport 1065B) - 115
dierenwelzijn - dierlijke productie - vleeskuikens - pluimvee - diergezondheid - animal welfare - animal production - broilers - poultry - animal health
Onderzoek naar kritische succesfactoren voor een laag antibioticumgebruik bij vleeskuikens: rapport van het project Kritische Succesfactoren Pluimvee (KSF Pluimvee)
Bokma-Bakker, M.H. ; Wiegel, J. ; Holstege, M.M.C. ; Lauwere, C.C. de; Kluivers-Poodt, M. ; Bouwstra, R.J. - \ 2017
Wageningen : Wageningen UR Livestock Research (Livestock Research rapport 1065A) - 78
dierenwelzijn - dierlijke productie - diergezondheid - pluimvee - vleeskuikens - animal welfare - animal production - animal health - poultry - broilers
Commissioned by AVINED and the Ministry of Agriculture, Nature and Food Quality, research is carried out to identify critical success factors for low antibiotic use in broilers. By analysis of sectoral databases, associations between farm and flock characteristics and antibiotics use are determined. With the results of an additional survey, differences in technical and social factors between structural low and high users of antibiotics are examined.
Aanpak van fijnstof in stallen
Winkel, A. - \ 2017
Wageningen : Kennisonline
dierenwelzijn - diergezondheid - pluimvee - dierlijke productie - animal welfare - animal health - poultry - animal production
Sinds 2008 werken alle sectoren in Nederland aan het verlagen van hun uitstoot van fijnstof. In de veehouderij wordt gebruik gemaakt van speciale technieken zoals een strooiselschuif. Wageningen University & Research heeft deze technieken ontwikkeld.
Validation of Meyn Footpad Inspection System
Harn, J. van; Jong, I.C. de - \ 2017
Wageningen : Wageningen Livestock Research (Wageningen Livestock Research report 1044B) - 42
animal welfare - animal production - poultry - animal health - dierenwelzijn - dierlijke productie - pluimvee - diergezondheid
The current report describes the results of a validation of the Meyn Footpad Inspection System, a video imaging system to score footpad lesions in broiler chickens at the slaughter plant. It was suggested that the system might assign a different score to footpad lesions compared to a trained manual scorer. Therefore, on the request of the Ministry of Economic Affairs, Wageningen Livestock Research performed a limited validation of the system during two days at a commercial plant in The Netherlands. During the validation, the footpad lesion score was determined in a sample of each flock slaughtered on that particular day, manually by a trained observer as well as by the camera system, and the results were compared. This reports describes the results of this validation.
Project Insecten in pluimvee
Ruis, Markus - \ 2017
animal welfare - poultry - animal nutrition - animal behaviour - animal production
A meta-analysis of effects of post-hatch food and water deprivation on development, performance and welfare of chickens
Jong, I.C. de; Riel, J.W. van; Bracke, M.B.M. ; Brand, H. van den - \ 2017
PLoS One 12 (2017)12. - ISSN 1932-6203 - 20 p.
Chicken - Body weight - Yolk Sac - Gastrointestinal tract - animal performance - poultry - jejunum - meta-analysis
A ‘meta-analysis’ was performed to determine effects of post-hatch food and water deprivation (PHFWD) on chicken development, performance and welfare (including health). Two types of meta-analysis were performed on peer-reviewed scientific publications: a quantitative ‘meta-analysis’ (MA) and a qualitative analysis (QA). Previously reported effects of PHFWD were quantified in the MA, for variables related to performance, mortality and relative yolk sac weight. The QA counted the number of studies reporting (non-)significant effects when five or more records were available in the data set (i.e. relative heart, liver and pancreas weight; plasma T3, T4 and glucose concentrations; relative duodenum, jejunum and ileum weight; duodenum, jejunum and ileum length; and villus height and crypt depth in duodenum, jejunum and ileum). MA results indicated that 24 hours of PHFWD (i.e. ≥12–36 hours) or more resulted in significantly lower body weights compared to early-fed chickens up to six weeks of age. Body weights and food intake were more reduced as durations of PHFWD (24, 48, 72, ≥84 hours) increased. Feed conversion rate increased in chickens up to 21 and 42 days of age after ≥84 hours PHFWD in comparison with chickens fed earlier. Total mortality at day 42 was higher in chickens after 48 hours PHFWD compared to early fed chickens or chickens after 24 hours PHFWD. First week mortality was higher in chickens after ≥84 hours PHFWD than in early fed chickens. The MA for relative yolk sac weight was inconclusive for PHFWD. The QA for plasma T3, T4 and glucose concentrations indicated mainly short-term decreases in T3 and glucose in PHFWD chickens compared to early fed chickens, and no effects of PHFWD on T4 concentrations. Relative weights of liver, pancreas and heart were lower after PHFWD, but only in the first week of life. A retarded development of gut segments (duodenum, jejunum and ileum) was found in the first week of life, measured as shorter, lower relative weight, and lower villus height and crypt depth. It is concluded that 48 hours (≥36–60 hours) PHFWD leads to lower body weights and higher total mortality in chickens up to six weeks of age, the latter suggesting compromised chicken welfare, but effects of PHFWD on organ development and physiological status appear to be mainly short-term.
Stalboekje Pluimvee 2017 : Handboek voor natuurlijke pluimveegezondheidzorg met kruiden en andere natuurproducten
Groot, Maria ; Puls-van der Kamp, Ineke ; Asseldonk, Tedje van - \ 2017
Wageningen : RIKILT Wageningen University & Research (RIKILT uitgave 2017.701) - 107
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
De stalboekjes zijn oorspronkelijk gemaakt voor de biologische veehouderij (versies 2009 en 2011) in het kader van onderzoek voor Biokennis. Deze uitgave is in 2014 en 2015 aangevuld met nieuwe middelen en inzichten en aangepast voor toepassing in de gangbare pluimveehouderij. Dit betekent o.a. dat een hoofdstuk over vleeskuikens is toegevoegd en het leghennen stuk is uitgebreid. Het streven om het gebruik van antibiotica terug te dringen vraagt om een ander management. Goede voeding, huisvesting en hygiëne zijn hierbij belangrijk. 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.
Stand van zaken achterwege laten van ingrepen bij pluimvee : Evaluatie september 2017
Niekerk, T.G.C.M. van; Jong, I.C. de - \ 2017
Wageningen : Wageningen Livestock Research (Wageningen Livestock Research rapport 1051) - 57
dierenwelzijn - pluimvee - dierlijke productie - diergezondheid - animal welfare - poultry - animal production - animal health
Monitoring verduurzaming veehouderij 1.0 : een eerste proeve van een Monitorings-systematiek voor de 15 ambities van de Uitvoeringsagenda Duurzame Veehouderij, met initiële resultaten voor drie diersectoren en een aantal keteninitiatieven
Bos, A.P. ; Puente-Rodríguez, Daniel ; Reijs, Joan W. ; Peet, G.F.V. van der; Groot Koerkamp, Peter W.G. - \ 2017
Wageningen : Wageningen Livestock Research (Wageningen Livestock Research rapport 1045) - 113
dierenwelzijn - dierlijke productie - melkvee - varkens - pluimvee - huisvesting, dieren - diergezondheid - diergedrag - animal welfare - animal production - dairy cattle - pigs - poultry - animal housing - animal health - animal behaviour
In 2013, the governance network UDV formulated fifteen ambitions towards a sustainable livestock production. In this way, the UDV’s stakeholders defined the long-term goals of an integrated and sustainable livestock production. To what extent have these 15 ambitions been achieved? And, how substantial is the contribution of supra-legal initiatives to this process? In this report, we present the first elaboration of a monitoring system that enables the visualization of the progress made. Moreover, it also enables comparing the different livestock production systems and creates the basis for a comparison between conventional animal production and supra-legal initiatives. In this concept-report the system is applied initially to the three larger livestock production sectors in the Netherlands (i.e., dairy, pigs, and poultry) and –as far as enough data is available– to four supra-legal initiatives. The system is currently under construction. Particularly because it involves interpretation and a number of value-laden choices that –notwithstanding their current support by arguments and references to the literature– should become shared and supported by (at least) the UDV stakeholders in the near future.
Het effect van een verhoogde rustplaats op het gebruik en het gedrag bij opfok vleeskuikenouderdieren
Emous, R.A. van; Gunnink, H. ; Binnendijk, G.P. - \ 2017
Wageningen : Wageningen Livestock Research (Wageningen Livestock Research rapport 1047) - 19
dierlijke productie - pluimvee - vleeskuikens - vleeskuikenouderdieren - huisvesting, dieren - diergedrag - animal production - poultry - broilers - broiler breeders - animal housing - animal behaviour
Evaluatie Actieplan Stalbranden 2012-2016
Bokma-Bakker, Martien ; Bokma, Sjoerd ; Ellen, Hilko ; Hagen, René ; Ruijven, Charlotte van - \ 2017
Wageningen : Wageningen Livestock Research (Wageningen Livestock Research rapport 1035) - 80
dierenwelzijn - dierlijke productie - diergezondheid - pluimvee - varkens - melkvee - schapen - geiten - paarden - stallen - brand - voorkomen van branden - veiligheid - animal welfare - animal production - animal health - poultry - pigs - dairy cattle - sheep - goats - horses - stalls - fire - fire prevention - safety
Effecten van strooisellaagdikte op het gedrag van leghennen
Emous, R.A. van; Gunnink, H. ; Ogink, N.W.M. - \ 2017
Wageningen : Wageningen Livestock Research (Wageningen Livestock Research rapport 1036) - 20
dierenwelzijn - huisvesting, dieren - diergedrag - pluimvee - animal welfare - animal housing - animal behaviour - poultry
In dit rapport worden de resultaten gepresenteerd van een experiment naar de effecten van strooisellaagdikte op het gedrag van leghennen. Dit experiment is uitgevoerd in opdracht van het Ministerie van Economische Zaken door Wageningen Livestock Research. Uit dit onderzoek blijkt dat de strooisellaagdikte slechts marginale effecten heeft op het gedrag van leghennen. In zijn totaliteit suggereren de resultaten van dit experiment dat een 2 cm dikke strooisellaag op gemiddelde basis niet tot minder stofbadgedrag leidt, maar dat er wel sprake is van een ander tijdspatroon waarbij sprake lijkt van uitgesteld stofbadgedrag.
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