Staff Publications

Staff Publications

  • external user (warningwarning)
  • Log in as
  • language uk
  • About

    '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.

    We have a manual that explains all the features 

    Current refinement(s):

    Records 1 - 20 / 2041

    • help
    • print

      Print search results

    • export
      A maximum of 250 titles can be exported. Please, refine your queryYou can also select and export up to 30 titles via your marked list.
    • alert
      We will mail you new results for this query: keywords==pigs
    Check title to add to marked list
    Variance estimates are similar using pedigree or genomic relationships with or without the use of metafounders or the algorithm for proven and young animals1
    Aldridge, Michael N. ; Vandenplas, Jérémie ; Bergsma, Rob ; Calus, Mario P.L. - \ 2020
    Journal of Animal Science 98 (2020)3. - ISSN 0021-8812
    pigs - restricted maximum likelihood - single step - variance components

    With an increase in the number of animals genotyped there has been a shift from using pedigree relationship matrices (A) to genomic ones. As the use of genomic relationship matrices (G) has increased, new methods to build or approximate G have developed. We investigated whether the way variance components are estimated should reflect these changes. We estimated variance components for maternal sow traits by solving with restricted maximum likelihood, with four methods of calculating the inverse of the relationship matrix. These methods included using just the inverse of A (A-1), combining A-1 and the direct inverse of G (HDIRECT-1), including metafounders (HMETA-1), or combining A-1 with an approximated inverse of G using the algorithm for proven and young animals (HAPY-1). There was a tendency for higher additive genetic variances and lower permanent environmental variances estimated with A-1 compared with the three H-1 methods, which supports that G-1 is better than A-1 at separating genetic and permanent environmental components, due to a better definition of the actual relationships between animals. There were limited or no differences in variance estimates between HDIRECT-1, HMETA-1, and HAPY-1. Importantly, there was limited differences in variance components, repeatability or heritability estimates between methods. Heritabilities ranged between <0.01 to 0.04 for stayability after second cycle, and farrowing rate, between 0.08 and 0.15 for litter weight variation, maximum cycle number, total number born, total number still born, and prolonged interval between weaning and first insemination, and between 0.39 and 0.44 for litter birth weight and gestation length. The limited differences in heritabilities suggest that there would be very limited changes to estimated breeding values or ranking of animals across models using the different sets of variance components. It is suggested that variance estimates continue to be made using A-1, however including G-1 is possibly more appropriate if refining the model, for traits that fit a permanent environmental effect.

    Review on farrowing housing and management
    Pedersen, L.J. ; Patt, A. ; Ruis, M.A.W. ; Hoofs, A.I.J. ; Vermeer, H.M. ; Kongsted, A. - \ 2020
    EURCAW-Pigs - 19 p.
    pigs - animal welfare - animal husbandry - farrowing houses - farrowing - sows - piglets - animal production - animal health - animal behaviour - animal housing
    Teat lesions: indicator of lack of space and large litter sizes in pigs
    Ruis, M.A.W. - \ 2020
    EURCAW-Pigs - 2 p.
    pigs - animal welfare - animal husbandry - farrowing houses - farrowing - sows - piglets - indicators - space
    Facial and carpal joint lesions: indicators of lack of space and large litter sizes in pigs
    Ruis, M.A.W. - \ 2020
    EURCAW-Pigs - 2 p.
    pigs - animal welfare - animal husbandry - farrowing houses - farrowing - sows - piglets - indicators - space
    Review of climate control and space allowance during transport of pigs (version 1.0)
    Bracke, M.B.M. ; Herskin, M.S. ; Marahrens, M.A. ; Gerritzen, M.A. ; Spoolder, H.A.M. - \ 2020
    EURCAW-Pigs - 34 p.
    pigs - animal welfare - transport of animals - climate - space - meat animals - finishing - animal production - animal health - transport - animal behaviour - occupation
    Question to EURCAW-Pigs: To what extent can jute sacks as enrichment for pigs be scored as ‘edible’? : EURCAW’s response
    Bracke, M.B.M. - \ 2020
    EURCAW-Pigs - 4 p.
    pigs - animal welfare - animal husbandry - docking - tail biting - meat animals - finishing - piglets - animal production - animal behaviour - animal housing
    Skin lesions: indicator to assess the risks for tail biting in pig
    Patt, A.G. ; Ruis, M.A.W. ; Schubbert, A. - \ 2020
    Wageningen : EURCAW-Pigs - 2 p.
    pigs - animal welfare - animal husbandry - docking - tail biting - piglets - meat animals - finishing - indicators - space
    Suitability of enrichment materials: indicator to assess the risks for tail biting in pigs, indicator factsheet
    Ruis, M.A.W. ; Patt, A.G. - \ 2020
    Wageningen : EURCAW-Pigs - 2 p.
    pigs - animal welfare - animal husbandry - docking - tail biting - piglets - meat animals - finishing - indicators
    Fouling: indicator to assess the risks for tail biting in pigs, indicator factsheet
    Patt, A.G. ; Ruis, M.A.W. ; Schubbert, A. - \ 2020
    Wageningen : EURCAW-Pigs - 2 p.
    pigs - animal welfare - animal husbandry - docking - tail biting - piglets - meat animals - finishing - indicators - climate - space
    Tail injuries: indicator for tail biting in pigs, indicator factsheet
    Ruis, M.A.W. ; Patt, A.G. - \ 2020
    Wageningen : EURCAW-Pigs - 2 p.
    pigs - animal welfare - animal husbandry - docking - tail biting - piglets - meat animals - finishing - indicators
    Tail docking: how to recognize docked tails in pigs?: indicator factsheet
    Ruis, M.A.W. ; Patt, A.G. - \ 2020
    Wageningen : EURCAW-Pigs - 2 p.
    pigs - animal welfare - animal husbandry - docking - tail biting - piglets - meat animals - finishing - indicators
    Lameness: indicator to assess the risks for tail biting in pigs, indicator factsheet
    Patt, A.G. ; Ruis, M.A.W. ; Schubbert, A. - \ 2020
    Wageningen : EURCAW-Pigs - 2 p.
    pigs - animal welfare - animal husbandry - docking - tail biting - piglets - meat animals - finishing - indicators - lameness - health
    Estimation of litter size variability phenotypes in Large White sows
    Dobrzański, Jan ; Mulder, Han A. ; Knol, Egbert F. ; Szwaczkowski, Tomasz ; Sell-Kubiak, Ewa - \ 2020
    Journal of Animal Breeding and Genetics (2020). - ISSN 0931-2668
    pigs - reproductive traits - total number born - trait's variation

    The objective of this study was to obtain new phenotypes of phenotypic variability for the total number born (TNB) in pigs using the residual variance of TNB. The analysis was based on 246,799 Large White litter observations provided by Topigs Norsvin. Three animal models were used to obtain estimates of residual variance for TNB: the basic model (BM) containing fixed effects of farm–year and season and random effects of animal and permanent environmental sow, the basic model with an additional fixed effect of parity (BMP) and a random regression model (RRM). The within-individual variance of the residuals was calculated and log-transformed to obtain three new variability traits: LnVarBM, LnVarBMP and LnVarRRM. Then, (co)variance components, heritability, the genetic coefficient of variation at the standard deviation level (GCVSDe) and genetic correlations between the three LnVar's and between the LnVar's and mean total number born (mTNB) were estimated with uni-, bi- and trivariate models. Results indicated that genetically LnVar's are the same trait and are positively correlated with the mTNB (~0.60). Thus, both traits should be included in breeding programmes to avoid an increase in TNB variability while selecting for increased TNB. Heritability of the LnVar's was estimated at 0.021. The GCVSDe for LnVar's showed that a change of 8% in residual standard deviation of TNB could be obtained per generation. Those results indicate that phenotypic variability of litter size is under genetic control, thus it may be improved by selection.

    MRSA in Pigs and the Environment as a Risk for Employees in Pig-Dense Areas of Sri Lanka
    Kalupahana, Ruwani S. ; Duim, Birgitta ; Verstappen, Koen M. ; Gamage, Chandika D. ; Dissanayake, Nilanthi ; Ranatunga, Lakmali ; Graveland, Haitske ; Wagenaar, Jaap A. - \ 2019
    Frontiers in Sustainable Food Systems 3 (2019). - ISSN 2571-581X
    food chain - livestock - MRSA - pigs - pork - small-scale farming - Sri Lanka

    Livestock-associated methicillin-resistant Staphylococcus aureus (LA-MRSA) is widely spread in intensive farming systems and considered an occupational risk for humans. MRSA is a common nosocomial pathogen in Sri Lanka, but information about prevalence of MRSA in pig farming in Sri Lanka is scarce. Farming is largely a small-scale confined system, and antimicrobial use in these systems is poorly regulated with no veterinary oversight for use. This study identified on 100 pig farms a MRSA prevalence of 10%, with MRSA-positive samples in pigs, farm workers, and dust of 1.2% (6/493), 2.2% (5/228), and 0.8% (1/119), respectively. The genotypes of these strains were compared with 22 human MRSA strains from a hospital; identified in pig farms were CC1/ST1/t127, CC5/ST5/t002, CC6/ST6/t304, or t4403, singleton ST3841/t10744, of which CC1/ST1/t127 and CC/ST5/t002 were present both in isolates from pigs and humans, suggesting a human origin. LA-MRSA types associated with intensive farming (ST398, ST9) were not detected. The low MRSA prevalence at farm level (10% vs. up to 70% in intensive farming systems) might be due to the management of these farms—open air and low dust. We conclude that in Sri Lanka the occupational risk for MRSA acquisition of people working with pigs in the described management systems is negligible.

    Climate in Pig Houses – Air Quality
    Vermeer, H.M. - \ 2019
    pigs - animal welfare - animal husbandry - piglets - meat animals - finishing
    Wat kost ons eten echt?
    Baltussen, W.H.M. ; Scholte, M. ; Idsert, B. van den; Osinga, K.J. - \ 2019
    animal welfare - animal production - dairy cattle - pigs - animal housing
    Changes: Risk assessment, presentation Anita Hoofs, EURCAW-Pigs Regional meeting West, 2019
    Hoofs, A.I.J. ; Kluivers-Poodt, M. ; Peet-Schwering, C.M.C. van der; Vermeer, H.M. ; Peet, G.F.V. van der; Tobias, T. - \ 2019
    pigs - animal welfare - animal husbandry - docking - tail biting - piglets - meat animals - finishing
    Action plans
    Spoolder, H.A.M. - \ 2019
    pigs - animal welfare
    Kruiden voor landbouwhuisdieren
    Groot, M.J. - \ 2019
    Wageningen : Groen Kennisnet
    animal welfare - animal production - goats - turkeys - rabbits - dairy cattle - poultry - sheep - pigs - veal calves - animal nutrition - animal health
    Keuzedeel Landbouwhuisdieren (MBO)
    Ruis, M.A.W. ; Vorderman, Evert ; Dijk, Nienke van; Fokkema, R. ; Visser, Annewies ; Hessel, Huub ; Hoorweg, Fleur ; Groffen, H. ; Korsten, C. ; Goot, L. van der; Hoop, O. de - \ 2019
    Wageningen : Groen Kennisnet
    animal welfare - animal production - dairy cattle - pigs - poultry - animal health - animal behaviour - animal nutrition - education
    Check title to add to marked list
    << previous | next >>

    Show 20 50 100 records per page

     
    Please log in to use this service. Login as Wageningen University & Research user or guest user in upper right hand corner of this page.