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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Within-population differences in personality and plasticity in the trade-off between vigilance and foraging in kangaroos
Animal Behaviour, Volume 92, Year 2014
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Description
Behavioural traits can vary between individuals from the same population. These differences can involve consistent variation in the level of a particular behaviour (personality) or differences in the way individuals adjust their behaviour to environmental gradients (plasticity). In prey species, feeding rates and vigilance vary with environmental, social and individual factors and the feeding rate/vigilance relationship reflects the trade-off between food acquisition and safety. While feeding rates and vigilance have been shown to vary between individuals in relation to group size and predation risk, how they relate to other factors has not yet been investigated, nor has between-individual variation in this trade-off. We studied between-individual variation in vigilance, feeding rates and their trade-off in female eastern grey kangaroos, Macropus giganteus, to see whether females showed consistent behavioural differences and different plasticity in relation to ecological (food patch richness), social (group sizes) and physiological (reproductive states) conditions. We addressed two contrasting hypotheses: an 'ecological' hypothesis under which individuals facing the same conditions should behave similarly, and a 'behavioural' hypothesis under which they should behave differently because of their own personality or plasticity. Female kangaroos tended to adjust their behaviours similarly in relation to ecological and social conditions, supporting the ecological hypothesis. However, they also showed differences in personality and plasticity in relation to their reproductive states that could not be explained by energetic demand alone this was suggestive of different maternal strategies, thus supporting the behavioural hypothesis. Altogether these results suggest that consistent differences in animals' personality and behavioural plasticity can be promoted by physiological conditions and are not necessarily repeatable across different ecological contexts. © 2014 The Association for the Study of Animal Behaviour.
Authors & Co-Authors
Favreau, François René
Australia, Brisbane
The University of Queensland
France, Villeurbanne
Laboratoire de Biométrie et Biologie Évolutive
France, Angers
Université D’angers
Goldizen, Anne Wilson
Australia, Brisbane
The University of Queensland
Fritz, Hervé
France, Villeurbanne
Laboratoire de Biométrie et Biologie Évolutive
Blomberg, Simone P.
Australia, Brisbane
The University of Queensland
Pays, Olivier
France, Angers
Université D’angers
Statistics
Citations: 25
Authors: 5
Affiliations: 3
Identifiers
Doi:
10.1016/j.anbehav.2014.04.003
ISSN:
00033472
Research Areas
Food Security
Maternal And Child Health
Sexual And Reproductive Health
Study Design
Cross Sectional Study
Participants Gender
Female