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Development of shy/bold behaviour in squid: contaxt-specific phenotypes associated with development plasticity

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Sinn, DL and Gosling, SD and Moltschaniwskyj, NA (2008) Development of shy/bold behaviour in squid: contaxt-specific phenotypes associated with development plasticity. Animal Behaviour, 75 (2). pp. 433-442. ISSN 003-3472

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Abstract

Animals often differ from one another in their willingness to take risks in a number of functional contexts related to fitness (e.g. mating, dispersal, and foraging behaviour). Although several studies have reported life history correlates and selective consequences of this variation in shy/bold behaviour, little attention has been paid to developmental processes resulting in shy/bold phenotypes. Here, we present a lifetime developmental study of shy/bold behaviour in dumpling squid, Euprymna tasmanica. Behaviour was measured in two test contexts, a threat and a feeding test, at five times across the entire life span. Across test contexts, shy/bold behaviour was not correlated at any age; while within a test context, individual shy/ bold phenotypes were consistent both before and after sexual maturity. During sexual maturity, different phenotypes displayed different amounts of developmental variation; shyer animals were more plastic in feeding tests, while bolder animals were more plastic in threat ones. Our results suggest that for some animals shy/bold behaviour throughout development is uncorrelated across different contexts related to risk, while within a context, there may still be developmental constraints to changing shy/bold behaviour. This constraint within a functional context, however, may be phenotype-specific, with some phenotypes able to change more than others. These results indicate that a greater understanding of developmental pathways is needed to determine whether shy/bold phenotypes per se are the sole focus of selection. Differences in developmental plasticity between shy/bold phenotypes may also confer differential fitness in fluctuating environments.

Item Type: Article
Keywords: animal personality; behavioural syndromes; developmental plasticity; Euprymna tasmanica; shy/bold; southern dumpling squid
Journal or Publication Title: Animal Behaviour
Page Range: pp. 433-442
ISSN: 003-3472
Identification Number - DOI: 10.1016/j.anbehav.2007.05.008
Additional Information: The definitive version is available at http://www.sciencedirect.com
Date Deposited: 13 Jun 2008 00:52
Last Modified: 18 Nov 2014 03:42
URI: http://eprints.utas.edu.au/id/eprint/6666
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