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The multivariate approach identifies relationships between pre-slaughter factors, body lesions, ham defects and carcass traits in pigs

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  • Marika Vitali
  • Paolo Bosi
  • Elena Santacroce
  • Paolo Trevisi

Abstract

Abattoir meat inspection has been proposed for the collection of welfare outcomes. The identification of suitable animal-based measures (ABM) is still a critical point that needs to be implemented to avoid collinearity among measures. The present study aims to benchmark the presence of ABM such as skin and tail lesions and ham defects in carcasses from 79 batches of Italian Heavy pigs and to identify possible relationships between the assessed ABM and pre-slaughter factors such as the season and the overnight lairage. Furthermore, the study also considers the effect of pre-slaughter conditions and ABM on carcass traits parameters (cold carcass weight and lean meat percentage). Skin and tail lesions were recorded at the slaughter line. The presence of abscesses, muscle tears and veining defects were assessed in the hams at trimming, according to the Parma Ham Consortium. A multivariate analysis was performed to identify relationships between ABM and pre-slaughter factor; therefore, a linear model was built to assess the effect on carcass weight and lean meat percentage. Main welfare issues were represented by skin and tail lesions and muscle tears (prevalence above 10%). Multivariate analysis evidenced that skin lesions and veining defects were mostly associated with the warm season. Abscesses and muscle tears in the hams were more likely related to overnight lairage, while tail lesions contributed equally to both season and lairage. Moreover, lairage related factors showed to affect lean meat percentage. The findings of the present study suggest that ham defects might be useful indicators of pre-slaughter stress. The validation of these findings with physiological parameters could be of interest for further studies.

Suggested Citation

  • Marika Vitali & Paolo Bosi & Elena Santacroce & Paolo Trevisi, 2021. "The multivariate approach identifies relationships between pre-slaughter factors, body lesions, ham defects and carcass traits in pigs," PLOS ONE, Public Library of Science, vol. 16(5), pages 1-14, May.
  • Handle: RePEc:plo:pone00:0251855
    DOI: 10.1371/journal.pone.0251855
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    References listed on IDEAS

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    2. Lê, Sébastien & Josse, Julie & Husson, François, 2008. "FactoMineR: An R Package for Multivariate Analysis," Journal of Statistical Software, Foundation for Open Access Statistics, vol. 25(i01).
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