Publication :
Benefits of a ball and chain : simple environmental enrichments improve welfare and reproductive success in farmed american mink (neovison vison)

En cours de chargement...
Vignette d'image
Date
2014-11-11
Auteurs
Meagher, Rebecca K.
Campbell, Dana L. M.
Ross, Misha
Møller, Steen Henrik
Hansen, Steffen W.
Díez-León, María
Palme, Rupert
Mason, Georgia
Direction de publication
Direction de recherche
Titre de la revue
ISSN de la revue
Titre du volume
Éditeur
Public Library of Science
Projets de recherche
Structures organisationnelles
Numéro de revue
Résumé
Can simple enrichments enhance caged mink welfare? Pilot data from 756 sub-adults spanning three colour-types (strains)identified potentially practical enrichments, and suggested beneficial effects on temperament and fur-chewing. Our mainexperiment started with 2032 Black mink on three farms: from each of 508 families, one juvenile male-female pair wasenriched (E) with two balls and a hanging plastic chain or length of hose, while a second pair was left as a non-enriched (NE)control. At 8 months, more than half the subjects were killed for pelts, and 302 new females were recruited (half enriched:‘late E’). Several signs of improved welfare or productivity emerged. Access to enrichment increased play in juveniles. E minkwere calmer (less aggressive in temperament tests; quieter when handled; less fearful, if male), and less likely to fur-chew,although other stereotypic behaviours were not reduced. On one farm, E females had lower cortisol (inferred from faecalmetabolites). E males tended to copulate for longer. E females also weaned more offspring: about 10% more juveniles per Efemale, primarily caused by reduced rates of barrenness (‘late E’ females also giving birth to bigger litters on one farm),effects that our data cautiously suggest were partly mediated by reduced inactivity and changes in temperament. Peltquality seemed unaffected, but E animals had cleaner cages. In a subsidiary side-study using 368 mink of a second colour-type (‘Demis’), similar temperament effects emerged, and while E did not reduce fur-chewing or improve reproductivesuccess in this colour-type, E animals were judged to have better pelts. Overall, simple enrichments were thus beneficial.These findings should encourage welfare improvements on fur farms (which house 60-70 million minkp.a.) and in breedingcentres where endangered mustelids (e.g. black-footed ferrets) often reproduce poorly. They should also stimulate futureresearch into more effective practical enrichments.
Description
Revue
PLoS One, Vol. 11 (4), (Nov. 2014)
DOI
10.1371/journal.pone.0110589
URL vers la version publiée
Mots-clés
Citation
Type de document
article de recherche