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The influence of artificial light on the capture of deep-water demersal fish by bottom trawling

Published online by Cambridge University Press:  30 September 2002

J.D.M. Gordon
Scottish Association for Marine Science, Dunstaffnage Marine Laboratory, Oban, PA37 1QA, E-mail:
O.A. Bergstad
Ministry of Fisheries, Institute of Marine Research, Flødevigen Marine Research Station, N-4817 His, Norway
P.L. Pascoe
Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth, PL1 3DH


Lights were attached to the headline of a bottom trawl during a series of tows at 1000 m depth in the Rockall Trough (north-east Atlantic). There was no significant difference in the overall numerical abundance of demersal fish between the trawl catches with light and the controls with no light. A principal components analysis based on the total fish catch between the experimental and the control stations showed no segregation. At the individual species level significant differences in catch rate were found for eight species. These are discussed in relation to the small amount of available information on the visual systems of deep-sea demersal fish and their diet.

Research Article
2002 Marine Biological Association of the United Kingdom

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