Density influences the heritability and genetic correlations of fish behaviour under trawling-associated selection

Crespel, A., Miller, T., Rácz, A., Parsons, K. , Lindström, J. and Killen, S. (2021) Density influences the heritability and genetic correlations of fish behaviour under trawling-associated selection. Evolutionary Applications, 14(10), pp. 2527-2540. (doi: 10.1111/eva.13279) (PMCID:PMC8549612)

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Fishing-associated selection is one of the most important human-induced evolutionary pressures for natural populations. However, it is unclear if fishing leads to heritable phenotypic changes in the targeted populations, as the heritability and genetic correlations of traits potentially under selection have received little attention. In addition, phenotypic changes could arise from fishing-associated environmental effects, such as reductions in population density. Using fish reared at baseline and reduced group density and repeatedly harvested by simulated trawling, we show that trawling can induce direct selection on fish social behaviour. As sociability has significant heritability, and is also genetically correlated with activity and exploration, trawling has the potential to induce both direct and indirect selection on a variety of fish behaviours, potentially leading to evolution over time. However, while trawling selection was consistent between density conditions, the heritability and genetic correlations of behaviours changed according to the population density. Fishing-associated environmental effects can thus modify the evolutionary potential of fish behaviour, revealing the need to use a more integrative approach to address the evolutionary consequences of fishing.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Lindstrom, Dr Jan and Killen, Professor Shaun and Crespel, Dr Amelie and Miller, Mr Toby and Racz, Miss Anita and Parsons, Dr Kevin
Authors: Crespel, A., Miller, T., Rácz, A., Parsons, K., Lindström, J., and Killen, S.
College/School:College of Medical Veterinary and Life Sciences > School of Biodiversity, One Health & Veterinary Medicine
Journal Name:Evolutionary Applications
ISSN (Online):1752-4571
Published Online:19 July 2021
Copyright Holders:Copyright © 2021 The Authors
First Published:First published in Evolutionary Applications 14(10):2527-2540
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
167015The Influence of Individual Physiology on Group Behaviour in Fish SchoolsShaun KillenNatural Environment Research Council (NERC)NE/J019100/1Institute of Biodiversity, Animal Health and Comparative Medicine