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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Selecting for changes in average “parity curve” pattern of litter size in Large White pigs
Sell-Kubiak, Ewa ; Knol, Egbert Frank ; Mulder, Herman Arend - \ 2019
Journal of Animal Breeding and Genetics 136 (2019)2. - ISSN 0931-2668 - p. 134 - 148.
random regression - reproduction traits - sows - total number born - within-sow variation

This study aimed to analyse genetic background of variation in reproductive performance between parities of a sow and to investigate selection strategies to change the “parity curve”. Total number born (TNB) recorded in Large White sows was provided by Topigs Norsvin. Analysis with basic (BM) and random regression (RRM) models was done in ASReml 4.1. The BM included only a fixed “parity curve”, while RRM included 3rd order polynomials for additive genetic and permanent sow effects. Parameters from RRM were used in simulations in SelAction 2.1. Based on Akaike information criterion, RRM was a better model for TNB data. Genetic variance and heritability estimates of TNB from BM and RRM were increasing with parity from parity 2. Genetically, parity 1 is the most different from parities 7 to 10, whereas most similar to parities 2 and 3. This indicates presence of genetic variation to change the “parity curve”. Based on simulations, the selection to increase litter size in parity 1 only increases TNB in all parities, but does not change the observed shape of “parity curve”, whereas selection for increased TNB in parity 1 and reduced TNB in parity 5 decreases differences between parities, but also reduces overall TNB in all parities. Changing the “parity curve” will be difficult as the genetic and phenotypic relationships between the parities are hard to overcome even when selecting for one parity.

Follicular development of sows at weaning in relation to estimated breeding value for within-litter variation in piglet birth weight
Costermans, N.G.J. ; Teerds, K.J. ; Keijer, J. ; Knol, E.F. ; Koopmanschap, R.E. ; Kemp, B. ; Soede, N.M. - \ 2019
Animal 13 (2019)3. - ISSN 1751-7311 - p. 554 - 563.
lactation - litter uniformity - metabolism - reproduction - sows

In this study we aimed to identify possible causes of within-litter variation in piglet birth weight (birth weight variation) by studying follicular development of sows at weaning in relation to their estimated breeding value (EBV) for birth weight variation. In total, 29 multiparous sows (parity 3 to 5) were selected on their EBV for birth weight variation (SD in grams; High-EBV: 15.8±1.6, N=14 and Low-EBV: −24.7±1.5, N=15). The two groups of sows had similar litter sizes (15.7 v. 16.9). Within 24 h after parturition, piglets were cross-fostered to ensure 13 suckling piglets per sow. Sows weaned 12.8±1.0 and 12.7±1.0 piglets, respectively, at days 26.1±0.2 of lactation. Blood and ovaries were collected within 2 h after weaning. The right ovary was immediately frozen to assess average follicle size and percentage healthy follicles of the 15 largest follicles. The left ovary was used to assess the percentage morphologically healthy cumulus-oocyte complexes (COCs) of the 15 largest follicles. To assess the metabolic state of the sows, body condition and the circulating metabolic markers insulin, IGF1, non-esterified fatty acid, creatinine, leptin, urea and fibroblast growth factor 21 were analysed at weaning. No significant differences were found in any of the measured follicular or metabolic parameters between High-EBV and Low-EBV. A higher weight loss during lactation was related to a lower percentage healthy COCs (β= −0.65, P=0.02). Serum creatinine, a marker for protein breakdown, was negatively related to average follicle size (β= −0.60, P=0.05). Backfat loss during lactation was related to a higher backfat thickness at parturition and to a higher average follicle size (β=0.36, P<0.001) at weaning. In conclusion, we hypothesise that modern hybrid sows with more backfat at the start of lactation are able to mobilise more energy from backfat during lactation and could thereby spare protein reserves to support follicular development.

Work Programme for EURCAW-Pigs : European Reference Centre for Animal Welfare – Pigs: 2019-2020
Spoolder, H.A.M. - \ 2018
WUR Livestock Research - 21 p.
pigs - animal welfare - animal husbandry - transport of animals - slaughter - docking - tail biting - group housing - mixing - farrowing houses - farrowing - killing of animals - climate - space - fitness - handling - stunning - sows - boars - piglets - meat animals - finishing
Validation of transrectal ultrasonography for assessment of corpora lutea characteristics in pregnant sows and its relationship with litter characteristics at birth
Lima Alvares da Silva, Carolina ; Laurenssen, B.F.A. ; Knol, E.F. ; Kemp, B. ; Soede, N.M. - \ 2017
Translational Animal Science 1 (2017)4. - ISSN 2573-2102 - p. 507 - 517.
corpora lutea - piglet birth weight - pregnancy - sows - transrectal ultrasonography
In experiment 1 we investigated the accuracy of transrectal ultrasonography (TUS) to assess the number (OR) and diameter of corpora lutea (CL) in 45 and 25 sows, respectively, at 23.4 ± 2.9 d of pregnancy. The diameter was calculated as the average diameter of 10 biggest CL. Sows were subsequently slaughtered and OR was assessed by dissection of CL from both ovaries (n = 45) and average diameter of the 10 biggest CL was also calculated after measurement of CL with the caliper rule (n = 25). There was a weak relationship between OR counted after dissection of the ovaries and OR counted with TUS (β = 0.28 ± 0.01 CL/CL, P = 0.01), but there was a strong relationship between the average CL diameter measured with the caliper rule after dissection and the average CL diameter based on TUS (β = 1.0 ± 0.1 mm/mm, P < 0.0001). This shows that TUS is not a valid method to assess OR in pregnant sows but it is a valid method to assess average CL diameter. In experiment 2, we investigated the relationship between the average CL diameter assessed by TUS (n = 100) at 23.8 ± 2.4 d of pregnancy and average piglet birth weight (BW) and observed an increase of 37.6 ± 17.8 g in piglet BW per mm increase in average CL diameter measured by TUS (P = 0.04). This relationship is probably because larger CL develop from bigger follicles at ovulation, which might have ovulated oocytes of higher quality that developed into embryos with higher growth potential and thus higher birth weight.
Development of pigs raised in a group housing system for lactating sows and their litters
Nieuwamerongen, S.E. van - \ 2017
Wageningen University. Promotor(en): B. Kemp, co-promotor(en): J.E. Bolhuis; N.M. Soede. - Wageningen : Wageningen University - ISBN 9789463431392 - 270
pigs - piglets - sows - biological development - group housing - lactation - weaning - environmental enrichment - animal behaviour - performance - varkens - biggen - zeugen - biologische ontwikkeling - groepshuisvesting - lactatie - spenen - omgevingsverrijking - diergedrag - prestatieniveau

The aim of this thesis was to investigate the development of pigs that were raised in a newly developed group housing system for lactating sows and their litters, with a focus on the transition around weaning and performance later in life. The starting point of our multi-suckling (MS) system was the natural behaviour of pigs, and the system consisted of 5 farrowing pens connected to a communal area, which included a communal feeding area. Litters were grouped at 1 week of age. Compared with a conventional farrowing system (in which a sow and her piglets are housed in a pen in which the sow is confined individually in a crate), the MS system provided a more spacious and complex environment, with more social and physical enrichment. Before weaning, we found that MS piglets showed more feed-directed behaviour and less damaging behaviours, such as tail biting, than conventionally housed piglets. After weaning at 4 weeks of age, when housed in a more physically and socially enriched pen, MS-raised piglets showed a higher feed intake, a higher weight gain, more play behaviour, and less maladaptive behaviour than the conventionally raised piglets that were housed in a standard nursery pen. In a follow-up study, in which all pigs were housed under equal and enriched conditions after weaning, we found that piglets raised in the MS system had a higher feed utilisation and a lower carbohydrate absorption in an oral sugar absorption test in the early post-weaning phase. In a subsequent study, the same animals were used to investigate their social and cognitive development, using behaviour tests during which pigs competed for access to feed. We found few differences, but there were indications that the pigs raised pre-weaning in the MS system made more use of social information than the conventionally raised pigs. Lastly, we studied effects of different weaning procedures in the MS system (gradual weaning during 9 weeks of lactation vs. abrupt weaning at 4 weeks of age). Weaning seemed to have less impact for the pigs subjected to the gradual weaning treatment (reflected in weight gain and maladaptive behaviour). Also on the long term during the finishing phase (during which both groups were housed equally from 9 weeks of age), the pigs subjected to the gradual weaning treatment showed less maladaptive behaviour and had fewer body lesions than abruptly weaned pigs. To conclude, the multi-suckling system seems promising for improving pig performance, behaviour, and welfare, especially in combination with a more gradual weaning procedure during an extended lactation.

Groepskraamsysteem: ontwikkeling van zeugen, biggen en vleesvarkens bij spenen op 4 of 9 weken leeftijd
Peet-Schwering, C.M.C. van der; Nieuwamerongen, S.E. van; Bolhuis, J.E. ; Binnendijk, G.P. ; Soede, N.M. - \ 2017
Wageningen : Wageningen Livestock Research (Livestock Research rapport 1012) - 38
zeugen - zogende vrouwtjes - biggen - speenleeftijd - groepshuisvesting - kraamhokken - zogen - varkenshouderij - dierlijke productie - prestatieniveau - sows - lactating females - piglets - age at weaning - group housing - farrowing pens - suckling - pig farming - animal production - performance
Op Varkens Innovatie Centrum Sterksel is het effect onderzocht van twee speenstrategieën op de ontwikkeling (groei, voeropname, gezondheid, spelgedrag en beschadigend gedrag) van biggen uit een groepskraamsysteem met vijf zeugen en haar biggen. In de ene groep werden de biggen abrupt gespeend op 4 weken leeftijd (A4). In de andere groep werden de biggen geleidelijk gespeend op 9 weken leeftijd door toepassing van intermittent suckling (IS9). De A4 biggen bleven na spenen in een groep van 35 bij elkaar in een verrijkt biggenhok. Op een leeftijd van 9 weken zijn zowel de A4 als de IS9 biggen opgelegd in verrijkte vleesvarkenshokken voor 35 dieren. De bevindingen van het onderzoek bij de zeugen, biggen en vleesvarkens zijn beschreven in dit rapport.
Emissies bij gedeeltelijke onderafzuiging in stallen voor vleesvarkens en zeugen
Aarnink, A.J.A. ; Hol, J.M.G. ; Troquet, L.M.P. ; Ogink, N.W.M. - \ 2015
Wageningen : Wageningen UR Livestock Research (Livestock Research rapport 916) - 35
varkenshouderij - zeugen - varkens - emissie - varkensstallen - stalklimaat - pig farming - sows - pigs - emission - pig housing - stall climate
Varkensstallen worden tegenwoordig veelal voorzien van luchtwassers om de uitgaande lucht te reinigen van ammoniak, geur en fijnstof. Het nadeel van de huidige wijze waarop luchtwassers worden ingezet is dat het niets doet aan de luchtkwaliteit in de stal. In Denemarken wordt al een aantal jaren onderzoek gedaan naar lokale afzuiging en reiniging van de lucht. Hierbij wordt een deel van de lucht (ca. 10 à 20% van de maximum capaciteit) onder de roosters afgezogen en gereinigd, terwijl de rest van de lucht via het plafond wordt afgezogen. Volgens Deens onderzoek kan de ammoniakemissie hiermee met 50 à 70% worden gereduceerd. De doelstelling van dit onderzoek was te bepalen hoe het Deense partiële onderafzuigsysteem vertaald kon worden naar de Nederlandse situatie. Hiervoor zijn modelberekeningen gedaan aan luchtstromingen in de stal en is een proof of principle onderzoek uitgevoerd op VIC Sterksel bij vleesvarkens en drachtige zeugen.
Effect of maternal antibiotic intervention in sows on gut development and microbiota in offspring : report of Feed4Foodure, VDI-2: 2013/2014
Greeff, A. de; Schokker, D. ; Roubos, P. ; Ramaekers, P. ; Peet-Schwering, C.M.C. van der; Bikker, P. ; Vastenhouw, S.A. ; Bree, F.M. de; Bossers, A. ; Harders, F.L. ; Smits, M.A. ; Rebel, J.M.J. - \ 2015
Wageningen : Wageningen UR Livestock Research (Livestock Research report 892) - 48
zeugen - antibiotica - microbiële besmetting - biggen - maatregel op voedingsgebied - varkenshouderij - diergezondheid - dierenwelzijn - veehouderij - sows - antibiotics - microbial contamination - piglets - nutritional intervention - pig farming - animal health - animal welfare - livestock farming
A significant contribution to microbial colonization of piglets comes from the sow: via vertical transmission of vaginal flora during birth and transmission of mucosal immune memory and flora by feaces, colostrum and milk. In this study we determine the effect of an maternal nutritional intervention with an antibiotic on early microbial colonization of piglets. We used antibiotic treatment as a harsh intervention to investigate the hypothesis that the microbial composition in sows, may have an effect on the early microbial colonization of piglets.
Groepskraamsysteem: analyse van de ontwikkeling van zeugen, biggen en vleesvarkens
Peet-Schwering, C.M.C. van der; Nieuwamerongen, S.E. van; Bolhuis, J.E. ; Troquet, L.M.P. ; Hoofs, A.I.J. ; Soede, N.M. - \ 2015
Wageningen : Wageningen UR Livestock Research (Livestock Research rapport 880)
zeugen - biggen - varkenshouderij - varkensfokkerij - varkens - spenen - kraamhokken - varkensstallen - diergedrag - prestatieniveau - biggen werpen - vee - dierenwelzijn - groepshuisvesting - sows - piglets - pig farming - pig breeding - pigs - weaning - farrowing pens - pig housing - animal behaviour - performance - farrowing - livestock - animal welfare - group housing
Op VIC Sterksel is de ontwikkeling (groei, voeropname, gezondheid, sociaal gedrag, spelgedrag en beschadigend gedrag) van biggen die opgegroeid zijn in een groepskraamsysteem en na spenen gehuisvest zijn in een verrijkt hok in een groep van 40 biggen vergeleken met de ontwikkeling van biggen die opgegroeid zijn in een traditioneel kraamhok en na spenen als toom bij elkaar zijn gehouden in een gangbaar hok met 10 biggen. Bij opleg in de vleesvarkensstal zijn alle biggen opgelegd in traditionele vleesvarkenshokken met 12 dieren per hok. De bevindingen van het onderzoek bij de zeugen, biggen en vleesvarkens zijn beschreven in dit rapport.
Effect van voerniveau bij drachtige lacterende zeugen op reproductie en conditie = Effect of feeding level in gestating lactating sows on reproduction and condition
Peet-Schwering, C.M.C. van der; Rommers, J.M. ; Troquet, L.M.P. ; Soede, N.M. - \ 2015
Wageningen : Wageningen UR Livestock Research (Livestock Research report 861) - 39
zeugen - voeropname - varkensvoeding - varkenshouderij - lichamelijke fitheid - zogen - voortplantingsvermogen - biggen - lactatie - sows - feed intake - pig feeding - pig farming - physical fitness - suckling - reproductive performance - piglets - lactation
Op VIC Sterksel is onderzocht wat het effect is van het voerniveau van zeugen tijdens de laatste 8 dagen van een zes weekse lactatie waarin ze ook drachtig zijn op de gewichts- en spekdikte ontwikkeling van de zeugen, de resultaten van de biggen en het aantal levend en dood geboren biggen in de volgende worp. De resultaten van het onderzoek zijn in dit rapport beschreven.
Associations of conformation and locomotive characteristics in growing gilts with osteochondrosis at slaughter
Koning, D.B. de; Grevenhof, E.M. van; Laurenssen, B.F.A. ; Hazeleger, W. ; Kemp, B. - \ 2015
Journal of Animal Science 93 (2015)1. - ISSN 0021-8812 - p. 93 - 106.
linear type traits - leg weakness - exterior traits - genetic correlations - epiphyseal growth - pigs - cartilage - sows - lesions - pathogenesis
Osteochondrosis (OC) and abnormalities in conformation and locomotive characteristics (CLC) have been associated with premature culling in sows. Several CLC have been suggested to be associated with OC and might help as an in vivo indicator for and increased risk of having OC. The aim of this study was to investigate associations of OC with CLC assessed at several ages in growing gilts from 2 separate experiments over the effects of dietary restriction (Exp. 1) and floor type (Exp. 2) on OC prevalence. In Exp. 1, gilts (n = 211) were subjectively assessed for CLC at, on average, 4, 9, 11, 16, and 24 wk of age. In Exp. 2, gilts (n = 212) were subjectively assessed for CLC at, on average, 4, 9, 11, 16, and 22 wk of age. Assessment was done on 10 conformation and 2 locomotive characteristics using a 9-point grading scale by 2 observers. At, on average, 27 wk of age in Exp. 1 and 24 wk of age in Exp. 2, gilts were slaughtered and the knee, elbow, and hock joints were macroscopically assessed for OC. The CLC most frequently associated with OC were O shape or X shape of the hind legs, straight or bowed hind legs, and straight or sickled hock. X-shaped hind legs were associated with OC at slaughter in the knee joint at 4, 9, and 24 wk of age and at the animal level (all joints taken together) at 4, 9, and 16 wk of age. Straight or bowed hind legs were associated with OC at slaughter in the knee joint at 4 and 11 wk of age; in the hock joint at 11 wk of age; and at the animal level at 4, 9, 11, and 22 wk of age. Straight or sickled hock was associated with OC at slaughter in the knee joint at 4 wk of age, in the hock joint at 9 and 22 wk of age, and at the animal level at 9 and 22 wk of age. Results show that several CLC assessed at several ages were associated with OC, but consistent associations of a type of CLC in every assessment could not be found. The associations of CLC with OC are, therefore, difficult to be used as an in vivo indicator of increased risk for OC.
A cohort study on Actinobacillus pleuropneumoniae colonisation in suckling piglets
Tobias, T.J. ; Klinkenberg, D. ; Bouma, A. ; Broek, J. van den; Daemen, A.J.J.M. ; Wagenaar, J.A. ; Stegeman, J.A. - \ 2014
Preventive Veterinary Medicine 114 (2014)3-4. - ISSN 0167-5877 - p. 223 - 230.
infection patterns - pigs - antibodies - transmission - efficacy - herds - sows - serotype-2 - hemolysin - vaccine
Actinobacillus pleuropneumoniae causes respiratory disease in pigs and despite the use of preventive measures such as vaccination and antimicrobials clinical outbreaks still occur. At weaning often many piglets are not colonised. If differences in prevalence between litters are large and if factors were known that could explain these differences, this may provide an opportunity to raise groups of A. pleuropneumoniae free piglets. To this end, a cohort study was performed on two endemically infected farrow-to-finish farms. Seventy-six of 133 sows were selected using stratified random selection by parity. Farmers complied with a strict hygiene and animal management protocol to prevent transmission between litters. Tonsil brush and serum samples taken three weeks before parturition were tested for antigen with an apxIVA qPCR and antibodies with Apx and Omp ELISAs, respectively. Three days before weaning tonsil brush samples from all piglets (n = 871) were collected and tested for antigen. Whereas all sows tested positive both in serology tests as well as qPCR, 0.41 of the litters tested fully negative and 0.73 of all piglets tested negative. The proportion of positively tested piglets in positive litters ranged from 0.08-1.0 (median= 0.36). A grouped logistic regression model with a beta binomial distribution of the probability for piglets to become infected was fitted to the data and associations with explanatory variables were explored. To test the possibility that alternatively the clustering was caused by onwards transmission among the piglets, a transmission model was fitted to the data incorporating sow-piglet and piglet-piglet transmission, but this model did not fit better. The results of this study showed that the number of colonised suckling piglets was highly clustered and mainly attributable to the variability of infectiousness of the dam, but no dam related risk factor for colonisation status of litter or piglets within litters could be identified. (C) 2014 Elsevier B.V. All rights reserved.
Tips en aanbevelingen voor het succesvol houden van opfokzeugen
Peet-Schwering, C.M.C. van der; Soede, N.M. ; Hoofs, A.I.J. ; Opschoor, C. - \ 2014
Wageningen UR Livestock Research
varkenshouderij - opfoktechnieken - zeugen - varkensstallen - diergezondheid - dierenwelzijn - groepshuisvesting - pig farming - rearing techniques - sows - pig housing - animal health - animal welfare - group housing
Vanaf 2013 is groepshuisvesting van zeugen tijdens de dracht verplicht. Eén van de succesfactoren is een goede opfok van de opfokzeugen. Maar wat is een goede opfok? Welke factoren zijn belangrijk? Dat is beschreven in het Handboek Opfokzeugen. Het handboek bevat praktische en vaktechnische kennis en tips en aanbevelingen voor het succesvol houden van opfokzeugen. In deze flyer worden de tips en aanbevelingen uit het handboek kort beschreven.
Invloed van mengmoment, leefoppervlak en hokverrijking op gedrag, beenwerk en productie van opfokzeugen tot en met de eerste worp = Influence of mixing moment, space allowance and enrichment on behaviour, leg soundness and production of gilts till first weaning
Peet-Schwering, C.M.C. van der; Soede, N.M. ; Hoofs, A.I.J. ; Verheijen, R.G.J.A. ; Binnendijk, G.P. ; Opschoor, C. - \ 2014
Wageningen : Wageningen UR Livestock Research (Rapport / Wageningen UR Livestock Research 784) - 64
varkenshouderij - biggen - vrouwelijke dieren - zeugen - opfoktechnieken - diergedrag - invloeden - lichaamsconditie - dierenwelzijn - pig farming - piglets - female animals - sows - rearing techniques - animal behaviour - influences - body condition - animal welfare
At Swine Innovation Centre Sterksel the effects of mixing moment, space allowance (from day 14 after birth till day 232) and enrichment on behaviour, leg soundness and production of gilts from day 14 after birth till first weaning were investigated. The results are described in this report.
Handboek opfokzeugen
Peet-Schwering, C.M.C. van der; Hoofs, A.I.J. ; Soede, N.M. ; Opschoor, C.T. - \ 2014
Wageningen : Wageningen UR Livestock Research (Report / Livestock Research 783) - 39
zeugen - varkensfokkerij - varkenshouderij - handboeken - technische informatie - dierenwelzijn - diergezondheid - huisvesting, dieren - sows - pig breeding - pig farming - handbooks - technical information - animal welfare - animal health - animal housing
Het handboek opfokzeugen bevat vaktechnische kennis die van belang is voor de varkenshouder op zijn bedrijf. De nadruk ligt op de praktische toepassing, hier en daar aangevuld met achtergrondinformatie. het handboek is bedoeld als naslagwerk en als bron van technische informatie.
Pig husbandry in a changing social and economic environment : societal attitudes, farm economics and animal welfare
Bergstra, T.J. - \ 2014
Wageningen University. Promotor(en): Elsbeth Stassen; Alfons Oude Lansink, co-promotor(en): Henk Hogeveen. - Wageningen : Wageningen University - ISBN 9789462572058 - 237
varkens - dierhouderij - dierenwelzijn - agrarische economie - attitudes - inkomsten uit het landbouwbedrijf - zeugen - dierlijke productie - pigs - animal husbandry - animal welfare - agricultural economics - attitudes - farm income - sows - animal production


The Dutch pig sector is attempting to address citizens’ concerns about animal welfare practices. Measures to improve animal welfare that were introduced by the pig sector did, however, not have the desired effect on citizens’ attitudes toward pig husbandry. This indicates that an improvement of animal welfare does not necessarily result in an improvement of citizens’ attitudes. This thesis aimed to estimate the effects of measures to improve animal welfare in sow husbandry in the Netherlands on animal welfare, farm income and citizens’ attitudes. First, the attitudes of citizens and other stakeholders of sow husbandry, i.e., pig farmers (conventional and organic), pig husbandry advisors and pig veterinarians, were investigated using a survey. It was shown that the large majority of respondents of citizens have negative attitudes toward sow husbandry with respect to aspects related to animals, humans and the environment. Citizens differed in these attitudes from the other stakeholders, except organic pig farmers. Based on their attitudes, citizens could be divided into four separate clusters. These clusters differed in terms of their attitudes toward sow husbandry and in their socio-demographic features.

Basic values underlie attitudes, but this thesis showed that basic values related to sow husbandry are not one-on-one related to attitudes toward sow husbandry of citizens and conventional pig farmers. Between conventional pig farmers and clusters of citizens there were differences in basic values related to sow husbandry. The two clusters with the most negative attitudes toward sow husbandry did not agree on the valuation of basic values with conventional pig farmers, while the other two clusters did on most of the basic values. The biggest cluster of the latter two clusters did agree on the valuation of several basic values with the former two clusters. This cluster can be useful for pig farmers to learn to understand the interpretation and weighing of basic values by citizens. An understanding that can be used in the development of new systems and measures to improve animal welfare within sow husbandry and in the communication between the pig sector and citizens.

Furthermore, in this thesis a simulation model was developed in which the effects of different measures for sow husbandry on animal welfare and farm income can be estimated. For each of the defined issues of sow husbandry, i.e., piglet mortality, tail biting and indoor housing, four measures were defined to improve animal welfare in an existing reference sow farm, representative for the Netherlands. The measures that aimed to reduce piglet mortality were the only measures with a positive effect on farm income. These measures had the best cost-effectiveness ratio compared to the other defined measures. When extending the simulation model with estimating the effects on citizens’ attitudes, the measure that includes straw provision, daylight and increased group sizes of gestating sows was the most efficient compared to the other defined measures. Results show that a positive effect of a measure on animal welfare does not necessarily lead to a similar relative improvement of citizens’ attitudes or a deterioration of farm income.

This thesis has shown that in order to achieve an improvement of citizens’ attitudes, it is essential for the pig sector to evaluate animal welfare measures using an approach that integrates the effects of measures on animal welfare, farm income and citizens’ attitudes.

Reproduction train : hulpmiddel bij inseminatie van zeugen
Ellen, H.H. ; Classens, P.J.A.M. - \ 2014
Lelystad : Wageningen UR Livestock Research
inseminatie - zeugen - inseminatieplaats - dekstallen - medische materialen - gereedschappen - insemination - sows - deposition site - service crates - medical materials - tools
De Reproduction Train is bedacht door een groep zeugenhouders en samen met hen ontwikkeld bij MS Schippers. Het is een ‘trein’ die op de boxen in de dekstal gemonteerd wordt. Op deze trein kunnen alle materialen die nodig zijn voor het insemineren van de zeugen geplaatst worden, zoals pipetten, koelbox, inseminatie gel, papier enzovoorts. Op deze manier zijn de materialen makkelijk te vervoeren door de stal en heeft men ze dicht bij de hand.
Literatuurstudie naar de voeding van lacterende zeugen in groepshuisvesting = Literature study on nutrition of group-housed lactating sows
Rommers, J.M. ; Peet-Schwering, C.M.C. van der; Soede, N.M. ; Gerritsen, R. - \ 2014
Lelystad : Wageningen UR Livestock Research (Rapport / Wageningen UR Livestock Research 759) - 38
varkenshouderij - zeugen - groepshuisvesting - zeugenvoeding - dierenwelzijn - zogen - varkens - dierlijke productie - diervoeding - pig farming - sows - group housing - sow feeding - animal welfare - suckling - pigs - animal production - animal nutrition
In this report a literature study on the nutrition of group-housed lactating sows with a prolonged lactation and intermittent suckling is described.
Literatuuronderzoek naar groepshuisvesting van kraamzeugen en hun biggen
Nieuwamerongen, S.E. van; Peet-Schwering, C.M.C. van der; Hoofs, A.I.J. ; Soede, N. ; Bolhuis, J.E. - \ 2014
Lelystad : Wageningen UR Livestock Research (Rapport / Wageningen UR Livestock Research 757) - 38
varkenshouderij - zeugen - groepshuisvesting - zogen - dierenwelzijn - biggen - varkens - dierlijke productie - diergedrag - kraamstallen - literatuuroverzichten - pig farming - sows - group housing - suckling - animal welfare - piglets - pigs - animal production - animal behaviour - farrowing houses - literature reviews
This report provides insight in the success and risk factors of group housing of lactating sows and their piglets in comparison to individual housing of lactating sows based on a literature review. These factors are discussed in relation to the development of a group farrowing system at Swine Innovation Centre Sterksel.
Innoveren in huisvesting mét en vanuit de praktijk
Hoofs, A.I.J. ; Peet-Schwering, C.M.C. van der - \ 2014
V-focus 2014 (2014)1. - ISSN 1574-1575 - p. 16 - 18.
varkenshouderij - varkens - duurzame ontwikkeling - dierenwelzijn - varkensstallen - zeugen - kraamstallen - biggen werpen - biggen - innovaties - dierlijke productie - pig farming - pigs - sustainable development - animal welfare - pig housing - sows - farrowing houses - farrowing - piglets - innovations - animal production
Innoveren in huisvesting betekent stallen ontwerpen mét en vanuit de praktijk. Varkenshouders willen vooruit. Enerzijds vanwege de ontwikkeling van nieuwe marktconcepten, zoals vlees met ‘welzijnssterren’ van de Dierenbescherming, en anderzijds willen varkenshouders weer echt trots kunnen zijn op hun sector. Dat zijn zij als anderen dat ook zijn.
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