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The Cephalopod by-Catch of Deep-Water Trawling on the Hebrides Slope

Published online by Cambridge University Press:  11 May 2009

P.R. Boyle ,
M.A. Collins  and
G.R. Williamson
P.R. Boyle
Affiliation:
Department of Zoology, University of Aberdeen, Tillydrone Avenue, Aberdeen, Scotland AB9 2TN.
M.A. Collins
Affiliation:
Department of Zoology, University of Aberdeen, Tillydrone Avenue, Aberdeen, Scotland AB9 2TN.
G.R. Williamson
Affiliation:
Heather Cottage, Kessock, Inverness, Scotland, IV1 1XP
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Extract

Deep-water trawling for fish species on the shelf slope off Scotland results in a by-catch of rare cephalopod species. The cirrate octopus Opisthoteuthis grimaldii is normally present below 800 m; at least one other species of cirrate and five species of incirrate octopus are found; significant extensions of range and depth are recorded. An incidental catch of the ommastrephid squid, Todarodes sagittatus, included a fully mature specimen and is indicative of its probable breeding locations. The results highlight the many taxonomic and systematic uncertainties surrounding the rarer cephalopod forms, and emphasize the utility of the fishing by-catch.

Type
Short Communications
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 78 , Issue 3 , August 1998 , pp. 1023 - 1026
Copyright
Copyright © Marine Biological Association of the United Kingdom 1998

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