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ETHOFISH Report Summary

Project ID: QLRS-2002-00799
Funded under: FP5-LIFE QUALITY
Country: Norway

Habitat selection of juvenile Atlantic cod, Gadus morhua and turbidity

Habitat selection of juvenile Atlantic cod, Gadus morhua and turbidity. We examined the effects of turbidity on habitat preference of juvenile Atlantic cod in the laboratory. In the first experiment, we compared three turbidity levels of kaolin (2, 7 and 15 beam attenuation m-1). In the second experiment, we looked at the effect of turbidity media (kaolin vs algae).

Although cod preferred intermediate kaolin turbidity over clear water, most combinations of turbidity did not influence habitat preference. Similarly, algae did not influence habitat preference by cod. We suggest that factors such as food availability and predation risk have more important effects on habitat preference by juvenile cod than differences in turbidity per se.


Justin J. MEAGER, (Researcher)
Tel.: +47-55584404
Fax: +47-55584450
Record Number: 43146 / Last updated on: 2006-11-28
Information source: e-TIP
Collaboration sought: Further research or development support
Stage of development: Scientific and/or technical knowledge (basic research)