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    Heritability and fitness-related consequences of squid personality traits

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    Author
    Sinn, D.L.
    Apiolaza, L.A.
    Moltschaniwskyj, N.A.
    Date
    2006
    Permanent Link
    http://hdl.handle.net/10092/355

    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.

    Subjects
    additive genetic variation
     
    animal personality
     
    antipredator
     
    fitness
     
    foraging
     
    shy–bold variation
     
    Fields of Research::270000 Biological Sciences::270500 Zoology::270599 Zoology not elsewhere classified
     
    Fields of Research::270000 Biological Sciences::270200 Genetics::270299 Genetics not elsewhere classified
     
    Fields of Research::300000 Agricultural, Veterinary and Environmental Sciences::300700 Fisheries Science::300799 Fisheries science not elsewhere classified
     
    Fields of Research::380000 Behavioural and Cognitive Sciences::380100 Psychology::380199 Psychology not elsewhere classified
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    • Engineering: Journal Articles [1026]
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