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Heritability and fitness-related consequences of squid personality traits


Sinn, DL and Apiolaza, LA and Moltschaniwskyj, NA, Heritability and fitness-related consequences of squid personality traits, Journal of Evolutionary Biology, 19, (5) pp. 1437-1447. ISSN 1010-061X (2006) [Refereed Article]

DOI: doi:10.1111/j.1420-9101.2006.01136.x


Dumpling squid, Euprymna tasmanica, show consistent individual differences in behaviour that can be classified according to indices reflecting shy-bold, activity and reactivity responses. Using crosses of wild-caught single males to multiple females with known behavioural phenotypes, this study estimated patterns of additive genetic and residual variance in these behavioural traits from offspring of squid in two contexts, a threat (antipredator) and feeding (foraging) test. Genetic contributions to behavioural expression were dependent on test context. Behaviours in antipredator contexts had significant heritabilities (h2 = 0.2-0.8) while behaviours from foraging contexts had lesser additive genetic and greater residual components (h2 = 0.05-0.08). Personality trait variation in females was not related to her fecundity. Female boldness in foraging situations, which co-varied with body size, explained small but significant variation (∼21%) in brood hatching success, while successful fertilization was determined by positive assortion of mate pairs according to their shy-bold phenotype. These results are discussed in terms of the ecological and evolutionary significance of animal 'personality' traits in wild populations of animals. © 2006 The Authors.

Item Details

Item Type:Refereed Article
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Fisheries sciences
Research Field:Aquaculture
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - aquaculture
Objective Field:Fisheries - aquaculture not elsewhere classified
UTAS Author:Sinn, DL (Dr David Sinn)
UTAS Author:Apiolaza, LA (Dr Luis Apiolaza)
UTAS Author:Moltschaniwskyj, NA (Associate Professor Natalie Moltschaniwskyj)
ID Code:42119
Year Published:2006
Web of Science® Times Cited:129
Deposited By:TAFI - Aquaculture
Deposited On:2006-08-01
Last Modified:2011-11-04

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