Domestication causes rapid changes in heart and brain morphology in Atlantic cod (Gadus morhua)

I Mayer; Justin J Meager; J E Skjaeraasen; P Rodewald; G Sverdrup; A Fernö

doi:10.1007/s10641-011-9831-1

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Domestication causes rapid changes in heart and brain morphology in Atlantic cod (Gadus morhua)

Journal article

Peer reviewed

Domestication causes rapid changes in heart and brain morphology in Atlantic cod (Gadus morhua)

I Mayer, Justin J Meager, J E Skjaeraasen, P Rodewald, G Sverdrup and A Fernö

Environmental Biology of Fishes, Vol.92(2), pp.181-186

2011

DOI: https://doi.org/10.1007/s10641-011-9831-1

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Abstract

Atlantic cod

brain morphology

domestication

Gadus morhua

heart morphology

Brain and heart development is very plastic in teleost fishes, and receptive to changes in social and environmental conditions. Domestication in salmonids has been reported to result in pronounced changes in both heart and brain morphology. In particular, a high prevalence of heart deformities has been reported in farmed salmonids, which has been linked to increased stress responsiveness that can impair survival of both farmed and escaped fish. Here we report for the first time that significant changes in heart and brain morphology occur following domestication of Atlantic cod (Gadus morhua), an emerging aquaculture species. Juvenile farmed cod developed significantly larger hearts and smaller brains, by weight, compared to their wild conspecifics. These differences occurred within the first captive generation, suggesting that they were driven largely by the strong contrast in environmental and social conditions experienced within their respective rearing environments. Changes in brain and heart morphology, as a consequence of domestication could affect the well-being and survival of Atlantic cod raised under intensive aquaculture conditions.

Details

Title: Domestication causes rapid changes in heart and brain morphology in Atlantic cod (Gadus morhua)
Authors: I Mayer (Author) - Norwegian School of Veterinary Science, Norway
Justin J Meager (Author) - University of the Sunshine Coast - Faculty of Science, Health and Education
J E Skjaeraasen (Author) - University of Bergen, Norway
P Rodewald (Author) - University of Bergen, Norway
G Sverdrup (Author) - University of Bergen, Norway
A Fernö (Author) - University of Bergen
Publication details: Environmental Biology of Fishes, Vol.92(2), pp.181-186
Publisher: Springer Netherlands
Date published: 2011
DOI: 10.1007/s10641-011-9831-1
ISSN: 0378-1909
Organisation Unit: University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99449989602621
Output Type: Journal article

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Collaboration types: Domestic collaboration
Web Of Science research areas: Ecology; Marine & Freshwater Biology