Size-selective mortality fosters ontogenetic changes in collective risk-taking behaviour in zebrafish, Danio rerio.

ABSTRACT: Size-selective mortality is common in fish populations and can operate either in a positive size-selective fashion by harvesting larger-than-average fish or be negatively size-selective by harvesting smaller-than-average fish. Through various mechanisms (like genetic correlations among behaviour and life-history traits or direct selection on behaviour co-varying with growth rate or size-at-maturation), size-selection can result in evolutionary changes in behavioural traits. Theory suggests that both positive and negative size-selection without additional selection on behaviour favours boldness, while evolution of shyness is possible if the largest fish are harvested. Here we examined the impact of size-selective mortality on collective boldness across ontogeny using three experimental line

SUBMITTER: Roy T 

PROVIDER: S-EPMC9547785 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature