Personality traits in captive Antillean manatees (Trichechus manatus manatus) in Brazil and perspectives for the release of individuals
Personality refers to an individual feature which is consistent over time and contexts and modulates how animals perceive and interact with the surrounding environment, influencing life history traits such as foraging, dispersion and reproduction. So far, very little is known about the Antillean manatee’s personality. Here we aimed to investigate personality traits of nine captive […]
Is individual temperament related to behaviors in a social context for a Neotropical parakeet species?
The relations of temperament dimensions obtained in tests traditionally used to assess interindividual differences with long-term behaviors and social rank of animals are poorly understood. Here, our aims were: (a) to investigate the relationships between temperament dimensions obtained through behavioral tests and the social rank of white-eyed parakeets (Psittacara leucophthalmus), and (b) to evaluate the […]
Consistency of temperament in bighorn ewes and correlates with behaviour and life history
Individual differences in temperament may affect how animals react to novel situations, avoid predation, invest in reproduction and behave in a variety of social contexts. Little information is available, however, about individual differences in temperament for wild animals. For bighorn sheep, Ovis canadensis, ewes captured as part of a long-term study, we compared behaviour during […]
Growth-mortality tradeoffs and ‘personality traits’ in animals
Consistent individual differences in boldness, reactivity, aggressiveness, and other ‘personality traits’ in animals are stable within individuals but vary across individuals, for reasons which are currently obscure. Here, I suggest that consistent individual differences in growth rates encourage consistent individual differences in behavior patterns that contribute to growth-mortality tradeoffs. This hypothesis predicts that behavior patterns […]
A Genetic Analysis of Avian Personality Traits: Correlated, Response to Artificial Selection
Individuals in a range of species consistently differ in their behavior towards mild challenges, over age and time. Differences have been found for several personality traits in a range of species. In great tits these traits have a genetic basis and are phenotypically correlated. Estimates of genetic correlations are, however, fundamental to understanding the evolution […]
Shyness and boldness in pumpkinseed sunfish: individual differences are context-specific
Natural selection often promotes a mix of behavioural phenotypes in a population. Adaptive variation in the propensity to take risks might explain individual differences in shyness and boldness in humans and other species. It is often implicitly assumed that shyness and boldness are general personality traits expressed across many situations. From the evolutionary standpoint, however, […]
Personality and foraging decisions in fallow deer, Dama dama
Recent studies have examined the ecological and evolutionary bases for variation in animal personality. However, only a few such studies have examined how foraging parameters are influenced by different personality domains. In wild ungulates, the trade-off between the time spent on food intake and antipredator behaviour differs between individuals, but the underlying reason for this […]
Rehabilitation of research chimpanzees: Stress and coping after long-term isolation
We report on the permanent retirement of chimpanzees from biomedical research and on resocialization after long-term social isolation. Our aim was to investigate to what extent behavioral and endocrine measures of stress in deprived laboratory chimpanzees can be improved by a more species-typical social life style. Personality in terms of novelty responses, social dominance after […]
Do rapid assays predict repeatability in labile (behavioural) traits?
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Environmental Enrichment Reduces Maladaptive Risk-Taking Behavior in Salmon Reared for Conservation
Hatcheries often produce bold fish that are maladapted to survive in the wild, as absence of predators and selection for fast growth tend to favour risk-taking behaviors. Not surprisingly, losses of hatchery fish through predation can be high immediately after release and this may account for the failure of many ex-situ fish conservation programmes. For […]