Behavioural responses of hatchery-reared and wild cod Gadus morhua to mechano-acoustic predator signals

Justin J Meager; P Rodewald; P Domenici; A Fernö; T Jarvi; J E Skjaeraasen; G Sverdrup

doi:10.1111/j.1095-8649.2011.02951.x

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Behavioural responses of hatchery-reared and wild cod Gadus morhua to mechano-acoustic predator signals

Journal article

Peer reviewed

Behavioural responses of hatchery-reared and wild cod Gadus morhua to mechano-acoustic predator signals

Justin J Meager, P Rodewald, P Domenici, A Fernö, T Jarvi, J E Skjaeraasen and G Sverdrup

Journal of Fish Biology, Vol.78(5), pp.1437-1450

2011

DOI: https://doi.org/10.1111/j.1095-8649.2011.02951.x

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Abstract

Fisheries Sciences

Ecology

Zoology

escape responses

farmed

learning

predator defences

restocking

sensory

The behavioural responses of wild (predator-experienced) and hatchery-reared (predator-naive) cod Gadus morhua to standardized mechano-acoustic (MA) stimuli were compared in the laboratory. Wild fish responded mainly with freezing and fast-start escapes away from the stimulus, whereas hatchery-reared fish often ignored or approached the stimulus. Wild fish also had stronger responses, turning faster during escapes and reducing activity immediately after the stimulus. Both fish types were less active on a 'risky' bare substratum after the stimulus. The antipredator responses of wild fish were consistent to repeated stimuli, whereas hatchery-reared fish that had generally only encountered harmless stimuli showed more variable responses with lower repeatability. This suggests that experience plays a role in shaping the behavioural response of fishes to MA stimuli.

Details

Title: Behavioural responses of hatchery-reared and wild cod Gadus morhua to mechano-acoustic predator signals
Authors: Justin J Meager (Author) - University of Bergen, Norway
P Rodewald (Author) - University of Bergen, Norway
P Domenici (Author) - Oristano, Italy
A Fernö (Author) - University of Bergen
T Jarvi (Author) - Stockholm University, Sweden
J E Skjaeraasen (Author) - University of Bergen, Norway
G Sverdrup (Author) - University of Bergen, Norway
Publication details: Journal of Fish Biology, Vol.78(5), pp.1437-1450
Publisher: Wiley-Blackwell Publishing Ltd.
Date published: 2011
DOI: 10.1111/j.1095-8649.2011.02951.x
ISSN: 0022-1112
Organisation Unit: University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99449649102621
Output Type: Journal article

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