Edwards, HA, Burke, T and Dugdale, HL orcid.org/0000-0001-8769-0099 (2017) Repeatable and heritable behavioural variation in a wild cooperative breeder. Behavioral Ecology, 28 (3). pp. 668-676. ISSN 1045-2249
Abstract
Quantifying consistent differences in behavior among individuals is vital to understanding the ecological and evolutionary significance of animal personality. To quantify personality, the phenotypic variation of a behavioral trait is partitioned to assess how it varies among individuals, which is also known as repeatability. If pedigree data are available, the phenotypic variation can then be further partitioned to estimate the additive genetic variance and heritability. Assessing the repeatability and heritability of personality traits therefore allows for a better understanding of what natural selection can act upon, enabling evolution. In a natural population of facultative cooperatively breeding Seychelles warbler (Acrocephalus sechellensis) on Cousin Island, a lack of breeding vacancies forces individuals into different life-history strategies, and these differences in reproductive state could generate behavioral differences among individuals in the population. We used this population to estimate the repeatability of four behavioral traits: novel environment exploration, novel object exploration, obstinacy/struggle rate, and escape response, and narrow-sense heritability (of: behavior h2B, behaviour minus observer variance, and personality), and evolvability, of the repeatable behavioral traits. We also tested for an among-individual correlation between the repeatable traits. We found that, compared to estimates in other study species, the exploratory behaviors were moderately repeatable (0.23–0.37), there was a positive among-individual correlation (0.51) between novel environment and novel object exploration, and that novel environment exploration was moderately heritable (0.17-0.65); h2B was low as it includes observer variance. This study further clarifies the additive genetic variance available for selection to act upon in this cooperatively breeding bird.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © The Author 2017. Published by Oxford University Press on behalf of the International Society for Behavioral Ecology. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. |
Keywords: | cooperative breeding; exploration; personality; heritability; repeatability; Seychelles warbler |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Biological Sciences (Leeds) > School of Biology (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 06 Feb 2017 12:36 |
Last Modified: | 22 Jan 2018 10:33 |
Status: | Published |
Publisher: | Oxford University Press |
Identification Number: | 10.1093/beheco/arx013 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:111817 |