Population differences in the effect of context on personality in an invasive lizard

Author:

Brand Jack A1ORCID,Naimo Annalise C1,Michelangeli Marcus12ORCID,Martin Jake M1ORCID,Sih Andrew2ORCID,Wong Bob B M1ORCID,Chapple David G1ORCID

Affiliation:

1. School of Biological Sciences, Monash University, Melbourne, Victoria, Australia

2. Department of Environmental Science and Policy, University of California, Davis, CA, USA

Abstract

Abstract Within populations, individuals often differ consistently in their average level of behavior (i.e., animal personality), as well as their response to environmental change (i.e., behavioral plasticity). Thus, changes in environmental conditions might be expected to mediate the structure of animal personality traits. However, it is currently not well understood how personality traits change in response to environmental conditions, and whether this effect is consistent across multiple populations within the same species. Accordingly, we investigated variation in personality traits across two ecological contexts in the invasive delicate skink (Lampropholis delicata). Specifically, lizards from three different populations were repeatedly measured for individual activity in group behavioral assays under differing levels of food availability. We found that environmental context had a clear effect on the structure of lizard personality, where activity rates were not repeatable in the absence of food, but were repeatable in the presence of food resources. The difference in repeatability of activity rates across contexts appeared to be largely driven by an increase in among-individual variance when tested in the presence of food resources. However, this was only true for one of the populations tested, with food context having no effect on the expression of personality traits in the other two populations. Our results highlight the important role of environmental context in mediating the structure of animal personality traits and suggest that this effect may vary among populations.

Funder

The Australian Research Council

Australasian Society for the Study of Animal Behaviour

Holsworth Wildlife Research Endowment

Ecological Society of Australia

Australian Government Research Training

Publisher

Oxford University Press (OUP)

Subject

Animal Science and Zoology,Ecology, Evolution, Behavior and Systematics

Reference65 articles.

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