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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    Dierenwelzijn in de kringlooplandbouw startdocument
    Boer, I.J.M. de; Backus, G.B.C. ; Bergh, W.T.A.A.G.M. van den; Erisman, Jan Willem ; Huijbers, J.A.M. ; Kemp, B. - \ 2020
    Den Haag : RDA - 8 p.
    Dierenwelzijn in de kringlooplandbouw samenvatting
    Boer, I.J.M. de; Backus, G.B.C. ; Bergh, W.T.A.A.G.M. van den; Erisman, Jan Willem ; Huijbers, J.A.M. ; Kemp, B. - \ 2020
    Den Haag : RDA - 16 p.
    Dierenwelzijn in de kringlooplandbouw
    Boer, I.J.M. de; Backus, G.B.C. ; Bergh, W.T.A.A.G.M. van den; Erisman, Jan Willem ; Huijbers, J.A.M. ; Kemp, B. - \ 2020
    Den Haag : RDA - 39 p.
    Boars with balls
    Backus, G.B.C. - \ 2018
    animal welfare - animal production - pigs - animal behaviour - animal ethics - animal health - castration
    Consumer acceptance of minced meat patties from boars in four European countries
    Aluwé, M. ; Aaslyng, M. ; Backus, G. ; Bonneau, M. ; Chevillon, P. ; Haugen, J.E. ; Meier-Dinkel, L. ; Mörlein, D. ; Oliver, M.A. ; Snoek, H.M. ; Tuyttens, F.A.M. ; Font-i-Furnols, M. - \ 2018
    Meat Science 137 (2018). - ISSN 0309-1740 - p. 235 - 243.
    Androstenone - Boar taint - Castration - European consumers - Skatole - Thresholds
    A consumer study was performed in four EU countries to further clarify the acceptability of meat with boar taint. In Denmark, France, Italy and Poland, a total of 476 female consumers evaluated 8 meat patties from boars with varying levels of skatole (0.10–0.40 μg/g fat tissue) and androstenone (0.47–2.00 μg/g fat tissue), in a pair-wise comparison with patties from castrates. Boar meat patties were always less preferred than the castrate meat patties, regardless of the level of androstenone and skatole. Acceptability of the boar meat patties decreased with increasing skatole level. In samples with low skatole levels, higher levels of androstenone also reduced acceptability among androstenone sensitive consumers. No clear threshold levels for androstenone and skatole could be identified. Maps presenting the reduction in preference due to increasing levels of skatole and androstenone, and corrected for the general acceptance of the meat product were developed, taking into account androstenone sensitivity. Further work is needed, covering the whole range of androstenone and skatole levels found in entire male pigs and for a wider set of meat products.
    Draft Genome Sequence of Lactobacillus plantarum SF2A35B
    Bron, Peter A. ; Lee, I.C. ; Backus, Lennart ; Hijum, Sacha A.F.T. Van; Wels, Michiel ; Kleerebezem, Michiel - \ 2016
    Genome Announcements 4 (2016)1. - ISSN 2169-8287
    The lactic acid bacterium Lactobacillus plantarum is intensively studied as a model probiotic species. Here, we present the draft genome sequence of the exopolysaccharide-producing strain SF2A35B.
    Evaluation of producing and marketing entire male pigs
    Backus, G.B.C. ; Broek, E.M.F. van den; Fels, J.B. van der; Heres, L. ; Immink, V.M. ; Kornelis, M. ; Mather, P.K. ; Peet-Schwering, Carola van der; Riel, Johannes van; Snoek, H.M. ; Smet, A. de; Tacken, G.M.L. ; Valeeva, N.I. ; Wagenberg, C.P.A. van - \ 2016
    NJAS Wageningen Journal of Life Sciences 76 (2016). - ISSN 1573-5214 - p. 29 - 41.
    Boars; - Castration; - Detection; - Behaviour; - Consumer acceptance; - Breeding

    This paper presents the results of a research program that was aimed at evaluating: (1) sensory evaluation of meat from entire male pigs, (2) preventive measures to reduce boar taint prevalence, (3) accuracy of detection for boar taint, and (4) the relationship between farm management characteristics and levels of mounting and aggressive behaviour of boars. Using observational and experimental studies data were collected in various segments of the pork supply chain. Consumer acceptance of meat from entire male pigs was evaluated. The effectiveness of preventive measures to reduce boar taint prevalence was determined. The relationship of farm (management) characteristics with boar taint prevalence, animal behaviour, skin lesions and lameness respectively was analysed. The similarity of the rank order between consumer perception of odour and human nose scores, skatole and androstenone levels respectively was determined. Consumers evaluate meat that passed the boar taint detection test comparable to meat from gilts. Meat samples that did not pass this test were evaluated less favourable. Ranking AI boars on their genomic breeding values for low boar taint resulted in a reduction in boar taint prevalence of 40%. The skatole level is lower in boars fed via a long trough than in boars fed by a single space feeder. Few eating places, restricted feeding, a low level of amino acids in the diet, insufficient water supply of the drinking system, illness of the pigs, a suboptimal climate and fear for humans were associated with a higher level of sexual and aggressive behaviour and more skin lesions. A partly open pen wall, clean pens and pigs, wider gaps of the slats, feeding by a long trough, and feeding wet by-products were associated with less sexual and aggressive behaviour and less skin lesions. Having more than 30 animals per pen was associated with a higher probability of high boar taint prevalence levels. Hygienic conditions were associated with lower boar taint prevalence levels. Assessing similarity of the rank order comparison between consumer perception and three selected boar taint detection parameters for the consumer perception attribute odour of meat resulted in the highest Kendall's W values for the human nose scores. In conclusion, boar tainted meat was rated as less pleasant by consumers compared to meat of gilts and non-tainted boar meat, indicating the need of detection as a safety net at the slaughter line. Breeding was an effective preventive measure to reduce boar taint. Farms with appropriate management, feeding and housing conditions have reduced levels of mounting and aggressive behaviour. Human nose scores were a better predictor of the rank order of consumer perception, compared to skatole levels and to androstenone levels.
    Organizing Open Innovation for Sustainability
    Ingenbleek, P.T.M. ; Backus, G.B.C. - \ 2015
    In: Adoption of Innovation. Balancing Internal and External Stakeholders in the Marketing of Innovation / Brem, A., Viardot, E., Switzerland : Springer - ISBN 9783319145228 - p. 109 - 131.
    Literature on open innovation has thus far predominantly focused on high technology contexts. Once an industry reaches the limits of a closed innovation model, open innovation may, however, also promise opportunities for sustainable development in a low-tech environment. Because in low-tech environments open innovation is unlikely to emerge spontaneously from the spillovers of R&D, it requires institutions that actively initiate and coordinate open innovation processes. This has subsequently important consequences for marketing, because buyers and sellers may jointly embark on innovation processes that are guided by a third-party organization. Based on a case study on an organization for open innovation in the agro-food industry, this chapter identifies potential contributions and pitfalls of these organizations. Results imply an optimal level between market—and organization-based forms of governing open innovation that depends on industry characteristics such as the stage of industry lifecycle. Implications for policy, business and future research of these findings are discussed.
    Varkenshouderij 2.0
    Backus, Ge - \ 2014
    pig farming - agricultural engineering - animal production - animal health - sensors
    EU-beleid voor genetisch gemodificeerde organismen
    Backus, G.B.C. ; Wagenberg, C.P.A. van - \ 2013
    In: EU-beleid voor landbouw, voedsel en groen: van politiek naar praktijk / Meester, G., Berkhout, P., Dries, L.K.E., Wageningen : Wageningen Academic Publishers - ISBN 9789086862306 - p. 301 - 310.
    Boars on the way : results of the 5 year Dutch research programme 'Boars heading for 2018'
    Backus, G.B.C. ; Smet, A. de; Wagenberg, C.P.A. van; Valeeva, N.I. ; Tacken, G.M.L. ; Kornelis, M. ; Snoek, H.M. ; Broek, E.M.F. van den; Immink, V.M. ; Haaster-de Winter, M.A. van; Peet-Schwering, C.M.C. van der; Fels, J.B. van der; Riel, J.W. van - \ 2013
    Wageningen : Wageningen UR - 60
    varkenshouderij - vleesproductie - beren (varkens) - ketenmanagement - varkensvlees - berengeur - organoleptische kenmerken - castratie - consumentenvoorkeuren - detectie - diergedrag - dierenwelzijn - varkens - dierlijke productie - diergezondheid - pig farming - meat production - boars - supply chain management - pigmeat - boar taint - organoleptic traits - castration - consumer preferences - detection - animal behaviour - animal welfare - pigs - animal production - animal health
    The programme 'Boars Heading for 2018’ is an initiative by the Dutch pork production chain represented in the Stop Castration steering committee. The report compiles 50 individual studies from a research programme that was carried out over a five-year period (2009-2013) in the Netherlands. The main results of the research program are presented in this report. The report contains 6 chapters, each of them including several project results: 1. Setting the stage, 2. Consumer, 3. Detection, 4 Preventive measures, 5. Behaviour of boars, 6. Boar taint economics and international developments.
    Impact of test sensitivity and specificity on pig producer incentives to control Mycobacterium avium infections in finishing pigs
    Wagenberg, C.P.A. van; Backus, G.B.C. ; Wisselink, H.J. ; Vorst, J.G.A.J. van der; Urlings, H.A.P. - \ 2013
    Preventive Veterinary Medicine 111 (2013)3-4. - ISSN 0167-5877 - p. 286 - 296.
    lymph-nodes - tuberculous lesions - slaughter pigs - food safety - environment - supplement - disease - quality
    In this paper we analyze the impact of the sensitivity and specificity of a Mycobacterium avium (Ma) test on pig producer incentives to control Ma in finishing pigs. A possible Ma control system which includes a serodiagnostic test and a penalty on finishing pigs in herds detected with Ma infection was modelled. Using a dynamic optimization model and a grid search of deliveries of herds from pig producers to slaughterhouse, optimal control measures for pig producers and optimal penalty values for deliveries with increased Ma risk were identified for different sensitivity and specificity values. Results showed that higher sensitivity and lower specificity induced use of more intense control measures and resulted in higher pig producer costs and lower Ma seroprevalence. The minimal penalty value needed to comply with a threshold for Ma seroprevalence in finishing pigs at slaughter was lower at higher sensitivity and lower specificity. With imperfect specificity a larger sample size decreased pig producer incentives to control Ma seroprevalence, because the higher number of false positives resulted in an increased probability of rejecting a batch of finishing pigs irrespective of whether the pig producer applied control measures. We conclude that test sensitivity and specificity must be considered in incentive system design to induce pig producers to control Ma in finishing pigs with minimum negative effects
    Duurzaam Vlees 2020
    Backus, Ge - \ 2013
    Evaluating the likelihood of the adoption of an animal welfare assessment system in European agri-food supply chains
    Aramyan, L.H. ; Ingenbleek, P.T.M. ; Backus, G.B.C. ; Roest, K. de; Tranter, R. - \ 2013
    International Journal of Quality & Reliability Management 30 (2013)1. - ISSN 0265-671X - p. 59 - 79.

    – The purpose of this paper is to analyse the likelihood of adoption of a recently designed Welfare Assessment System in agri‐food supply chains and the factors affecting the adoption decision. The application is carried out for pig and poultry chains.


    – This research consisted of two main components: interviews with retailers in pig and poultry supply chains in eight different EU countries to explore their perceptions towards the adoption possibilities of the welfare assessment system; and a conjoint analysis designed to evaluate the perceived adoption likelihood of the assessment system by different Standards Formulating Organisations (SFOs).


    – Stakeholders were found to be especially concerned about the costs of implementation of the system and how it could, or should, be merged with existing assurance schemes. Another conclusion of the study is that the presence of a strong third independent party supporting the implementation of the welfare assessment system would be the most important influence on the decision whether, or not, to adopt it.


    – This research evaluates the adoption possibilities of a novel Welfare Assessment System and presents the views of different supply chain stakeholders on an adoption of such a system. The main factors affecting the adoption decision are identified and analysed. Contrary to expectations, the costs of adoption of a new welfare assessment system were not considered to be the most important factor affecting the decision of supply chain stakeholders about the adoption of this new welfare system.
    Informatie wisselend van belang bij smaakbeleving varkensvlees
    Backus, G.B.C. - \ 2012
    Geen alternatief voor menselijke neus
    Backus, G.B.C. - \ 2012
    Varkens 13-04-2012 (2012). - ISSN 0166-5952
    Berengeur alleen te detecteren met neus
    Backus, G.B.C. - \ 2012
    Plattelandspost 16-04-2012 (2012).
    Non-castratie hoog op agenda in Duitsland
    Backus, G.B.C. - \ 2012
    Boerderij/Varkenshouderij 06-12-2012 (2012).
    La non-castration, réalité aux Pays-Bas. Numéro de l'article 13458
    Backus, G.B.C. - \ 2012
    Ebermast: Muss jetzt jeder mit
    Backus, G.B.C. - \ 2012
    SUS Schweinezucht und Schweinemast 2012 (2012)1. - ISSN 0944-307X - p. 36 - 41.
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