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Biological Studies of the Exploited Stock ofLoligo Forbesi (Mollusca: Cephalopoda) in the Azores

Published online by Cambridge University Press:  11 May 2009

Helen Rost Martins
Helen Rost Martins
Affiliation:
Department of Oceanography and Fisheries, University of the Azores, P-9900 Horta, Azores, Portugal
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Extract

Five hundred and twenty-eight specimens of Loligo forbesi Steenstrup, from landings in Horta, Faial, Azores, during the year 1 March 1980 to 28 February 1981, were tudied; 59·3 % were males, 40·7 % females. Of the males 80·2 % were sexually mature, of the females 91·6 %, both sexes showing the highest degree of maturity in spring and he lowest in autumn. The mean dorsal mantle length of the mature males was 56·5 cm, or females 33·5 cm. A weight-length relationship was calculated. he stomachs of 622 specimens were sampled, of which 306 contained food.

The prey omponents were studied qualitatively. The main prey was fish (82·0%), of which 0·5 % were horse mackerel, Trachurus picturatus, this being the most important food rganism. Preliminary results of statolith readings are given.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 62 , Issue 4 , November 1982 , pp. 799 - 808
Copyright
Copyright © Marine Biological Association of the United Kingdom 1982

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References

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