A1 Journal article – refereed

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

List of Authors: Crespel Amélie, Miller Toby, Rácz Anita, Parsons Kevin, Lindström Jan, Killen Shaun

Publisher: WILEY

Publication year: 2021

Journal: Evolutionary Applications


Journal acronym: EVOL APPL

Number of pages: 14

ISSN: 1752-4571

eISSN: 1752-4571

DOI: http://dx.doi.org/10.1111/eva.13279

URL: https://doi.org/10.1111/eva.13279

Fishing-associated selection is one of the most important human-induced evolutionary pressures for natural populations. However, it is unclear whether 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 selection 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.

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Last updated on 2021-17-09 at 13:29