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The survival probability of an individual may be limited by density-dependent mechanisms and by environmental stochasticity, but can also be modified by individual characteristics. In our study, we investigated over-winter survival of subadults of an enclosed European rabbit Oryctolagus cuniculus population in a temperate zone habitat over the period(More)
Wild European rabbits of both sexes have separate linear rank orders, which are established and maintained by intensive fights. This paper presents data from a 14-year study (1987–2000) on the population physiology and behavioural ecology of wild rabbits living in a 22,000 m2 enclosure and focuses on the relationship between social rank and reproduction in(More)
 Wild rabbits of the two sexes have separate linear rank orders, which are established and maintained by intensive fights. The social rank of individuals strongly influence their fitness: males and females that gain a high social rank, at least at the outset of their second breeding season, have a much higher lifetime fitness than subordinate individuals.(More)
The physiological response of nonrestrained rats to the presence of immobilized conspecifics during the beginning of the active period and the inactive period was studied. In immobilized animals concentrations of serum corticosterone (SCS), serum glucose, and liver glycogen, and the activity of liver tyrosine aminotransferase (TAT) during both the active(More)
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