Simple year-round cage enrichments for mink
Notice bibliographique
Résumé
Subjects were 2,400 kits from 600 families, on 3 commercial farms in Ontario, pair-housed from July-December. 75% were Blacks, 25% Demis. Two male-female pairs were used per family: one was provided with stimuli for interaction; the other housed in standard conditions. The supplemented cages received a golf ball, plastic wiffle ball, and hanging device to tug /chew (hose or plastic chain) (costing under $1.50 a cage). Behaviour, temperament, mortality rates and pelt quality were assessed. Supplemented kits were found to play more than their non-enriched siblings. Social play (defined as ‘rough and tumble’ interactions without screaming or hard biting) was unaffected, but enhanced object and locomotor play led to significantly higher overall levels in supplemented juveniles. There was no evidence that the added objects increased aggression. The added objects also had no effects on mortality. In stick tests in December, supplemented mink were significantly less likely to be fearful than their standard-housed siblings. When scored for reactions to the live-grading of their fur in November, supplemented mink were significantly less likely to scream than their standard-housed siblings. Across Blacks, the added objects did not seem to affect fur quality, but in Demis, supplemented mink were significantly likely to receive better live-grades than their standard-housed siblings. For pelted subjects, tails of dead animals were inspected for signs of tail-chewing/clipping. Typically 1 cm or less of the tailtip was affected. However, 20 mink across all three farms showed damage to 2 cm or more the tail, and 14 of these were standard-housed rather than supplemented: a trend to significance. Furthermore, pooling all instances of tail-chewing/-biting together, 7.9% supplemented mink had sucked/bitten tails, compared to 11.5 standard-housed: a significant effect. The pelts of all experimental mink were bar-coded for auction, and prices will be obtained in summer 2012. Data during mating showed that supplemented males were more effective maters than standard mink (e.g. showing longer copulations). Subjects selected for breeding have also been evaluated for stereotypic behaviour and faecal cortisol metabolite output, and for whelping success: data still to be analysed. Overall, these findings to date show that simple, long-term, cheap additions to standard cages can act as effective environmental enrichments for farmed mink.
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Comment cette classification a été obtenuedéplier
Prédiction machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,001 | 0,000 |
| Méta-épidémiologie (sens large) | 0,001 | 0,000 |
| Bibliométrie | 0,001 | 0,000 |
| Études des sciences et des technologies | 0,002 | 0,001 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,001 | 0,001 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,008 | 0,002 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule source (Gemma direct ou Codex distillé), pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».