The aim of the present research was to guage whether or not early postnatal stress resulting from cross-fostering alters the behavioral response to emphasize in weaned pigs. We hypothesized that piglets who have been cross-fostered into one other present litter would exhibit heightened behavioral indicators of stress after weaning in response to a few behavioral stress checks in comparison with their non-biological litter mates, and their non-fostered organic siblings. Three cross-fostered piglets from every non-fostered sibling litter have been randomly chosen and moved to a foster litter 12–24 h post-farrowing, the place they have been nursed alongside non-biological litter mates piglets till weaning (roughly 18 d of age). At 7- and 14-d post-weaning, all piglets underwent a novel object check of their house pens. At 21- and 28-d post-weaning, one male and one feminine piglet from every therapy underwent one among two behavioral checks: social isolation and dyadic contest in an remoted 1.22 × 1.22 m novel pen. All knowledge have been analyzed utilizing the GLIMMIX process in SAS.
Non-biological littermate pigs exhibited a decrease latency to work together with a novel object throughout novel object check spherical 1 in comparison with non-fostered pigs, whereas cross-fostered pigs have been intermediate to however not completely different from both therapy. A therapy by intercourse interplay was detected throughout novel object check spherical 2, the place cross-fostered males exhibited a decrease latency to work together with a novel object in comparison with non-fostered pigs and cross-fostered feminine pigs. Moreover, non-biological litter mates females exhibited a decrease latency to interplay with a novel object throughout novel object check spherical 2 in comparison with non-fostered siblings, cross-fostered feminine, and non-biological litter mate male pigs. No therapy variations have been detected in the course of the social isolation check. Remedy by intercourse interactions have been detected in the course of the dyadic contest for variety of aggressive interactions and variety of aggressive interactions initiated by an opponent. Particularly, non-fostered organic siblings females and cross-fostered males obtained a higher variety of aggressive interactions and a higher variety of aggressive interactions initiated by an opponent in comparison with non-fostered organic siblings males, cross-fostered females, and non-biological litter mate pigs.
Taken collectively, these outcomes point out that the early postnatal stress related to cross-fostering impacts cross-fostered piglets in a sex-specific method. Additional, non-biological litter mates pigs stands out as the most able to dealing with novel stressors post-weaning, as they exhibited fewer behavioral indicators of stress in the course of the novel object check and dyadic contests.
Byrd CJ, Younger JM, Sommer DM.
Cross-fostering alters the post-weaning pig behavioral stress response in a sex-specific method. Utilized Animal Behaviour Science. 2022; 249: