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Environmental variability in the early rearing environment generates behaviourally flexible cod: implications for rehabilitating wild populations

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dc.contributor.author Braithwaite, Victoria A.
dc.contributor.author Salvanes, Anne Gro Vea
dc.date.accessioned 2009-09-02T13:05:39Z
dc.date.available 2009-09-02T13:05:39Z
dc.date.issued 2005-06-02
dc.identifier.citation Proceedings of the Royal Society, London Series B 272(1568): 1107-1113 en
dc.identifier.issn 0962-8452
dc.identifier.issn 1471-2954
dc.identifier.uri http://dx.doi.org/10.1098/rspb.2005.3062
dc.identifier.uri http://hdl.handle.net/1956/3429
dc.description.abstract The release of hatchery-reared fishes for restoring threatened and endangered populations is one of the most controversial issues in applied ecology. A central issue has been to determine whether releases cause extinction of local wild populations. This may arise either through domesticated or non-local fishes hybridizing with wild fishes, or through inappropriate behavioural interactions; for example, many hatchery fishes show exaggerated aggressive and competitive behaviour and out-compete wild counterparts. The impact of the impoverished hatchery environment in shaping behaviour is only now receiving attention. Attempts to counteract hatchery-related behavioural deficiencies have utilized intensive training programmes shortly before the fishes are released. However, we show here that simple exposure to variable spatial and foraging cues in the standard hatchery environment generates fishes with enhanced behavioural traits that are probably associated with improved survival in the wild. It appears that fishes need to experience a varying and changeable environment to learn and develop flexible behaviour. Using variable hatchery rearing environments to generate suitable phenotypes in combination with a knowledge of appropriate local genotypes, rehabilitation of wild fishes is likely to succeed, where to date it has largely failed. en
dc.language.iso eng en
dc.publisher The Royal Society en
dc.rights Copyright 2005 The Royal Society of London. en
dc.subject Cod en
dc.subject Development of behaviour en
dc.subject Restocking en
dc.subject Environmental heterogeneity en
dc.title Environmental variability in the early rearing environment generates behaviourally flexible cod: implications for rehabilitating wild populations en
dc.type Journal article en
dc.type Peer reviewed en
dc.subject.nsi VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 no


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