Social stress, mortality and aggression in colonies and burrowing habitats - PubMed (original) (raw)
Social stress, mortality and aggression in colonies and burrowing habitats
R J Blanchard et al. Behav Processes. 1985 Aug.
Abstract
High mortality was found within six mixed-sex groups of Long-Evans rats living in burrowing habitats with 58% of subordinate males dying within 4 mo. of group formation. By contrast, no subordinate deaths occured during this time in six identical adult groups(3 males and 3 females) housed in similar (1 m square) colony cages without burrows. Although aggression against intruders was also much greater in habitats than colonies --through 400 days postformation--subordinate deaths did not appear to result from direct physical injury. It seems that mimicing key features of the rat's environment enhances intermale conflict and social stress, even while providing partial protection from biting attack. Behav. Proc.:
Copyright © 1985. Published by Elsevier B.V.
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