Analyse des facteurs de variation de la longévité des truies en élevage à partir de quatre nouveaux critères

51es Journées de la Recherche Porcine, 5 et 6 février 2019, Paris, p. 47-48, par Brigitte Badaourd et al., poster

Poster. 

La longévité des truies en élevage dépend à la fois de leurs performances, principalement en début de carrière, des risques d’accidents et des choix de conduite de l’éleveur. Les réformes prématurées ont un impact économique important (Morin et Thériault, 2005 ; Boulot et al, 2012), mais les enjeux sanitaires, et sociétaux sont également à prendre en compte. L’objectif de cette étude est de proposer différents critères de mesure de la longévité des truies et d’identifier leurs facteurs de variation en conditions d’élevage.

Analysis of factors associated with sow longevity on farms using four new criteria

The aim of this study was to analyse the longevity of sows in French herds to identify animal and farm factors associated with productive life performance. Information about individual careers was extracted from the French National Pig Management database (GTTT) for sows and gilts culled in 2015. Data were subjected to quality tests (age at culling, at first farrowing, etc.) after exclusion of certain herds: <50 sows or non-steady herds, located overseas, selection and multiplication herds, organic farms, or with specific signs of quality. Final analysis included 155 633 sows housed in 1 720 conventional farms. Longevity criteria were calculated per sow during its entire productive life: cumulative numbers of weaned litters and piglets (total born, born alive and weaned) and a score indicating whether 3 litters were reached or not (0/1). The number of litters weaned at culling varied from 0-20 (mean = 4.84 ± 2.96), with 8% and 26% culled before the 1rst and 3rd litter, respectively. The cumulative number of total born (70), born alive (60) and weaned piglets (55) varied greatly within parity ranks at culling. Univariate analysis showed several individual sow traits were significantly associated with all longevity criteria: genetics, origin, and age at 1st farrowing. Some farm factors also had significant effects: feed consumption/sow/year, group housing management, and flooring.