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Beak Length Analysis of Moroteuthis Ingens (Cephalopoda: Onychoteuthidae) from the Falkland Islands Region of the Patagonian Shelf

Published online by Cambridge University Press:  11 May 2009

George D. Jackson ,
Nicole G. Buxton  and
Magnus J.A. George
George D. Jackson
Affiliation:
Department of Zoology, University of Western Australia, Nedlands, Perth, Western Australia, 6019.
Nicole G. Buxton
Affiliation:
Falkland Islands Government Fisheries Department, Stanley, Falkland Islands.
Magnus J.A. George
Affiliation:
Falkland Islands Government Fisheries Department, Stanley, Falkland Islands.
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Extract

A detailed analysis of beak length to body length and weight measurements was carried out for the onychoteuthid squid Moroteuthis ingens, in the Falkland Islands region of the South Atlantic. Lower and upper rostral lengths were both good predictors of mantle length and body weight. In addition, the relationships of freshly dissected beaks to mantle length and body weight were significantly different to those of beaks dried before measuring, with dried beaks being better predictors of both variables.

A considerable amount of information on Southern Ocean squid biology has been obtained from analysis of beaks in the stomach contents of predators (Clarke, 1980,1983). Beak analysis can be particularly useful as it provides information on the species preyed upon as well as estimates of squid size and biomass ingested (Clarke, 1983, 1986).

Type
Short Communications
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 77 , Issue 4 , November 1997 , pp. 1235 - 1238
Copyright
Copyright © Marine Biological Association of the United Kingdom 1997

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