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Population structure and growth of the squid Illex illecebrosus (Cephalopoda: Ommastrephidae) off Nova Scotia, north-west Atlantic

Published online by Cambridge University Press:  01 April 2000

A.I. Arkhipkin  and
A.A. Fetisov
A.I. Arkhipkin
Affiliation:
Falkland Islands Government Fisheries Department, PO Box 598, Stanley, Falkland Islands, Email : fish.fig@horizon.co.fk Atlantic Research Institute of Marine Fisheries and Oceanography (AtlantNIRO), 5 Dm. Donskoy Street, Kaliningrad, 236000, Russia
A.A. Fetisov
Affiliation:
Atlantic Research Institute of Marine Fisheries and Oceanography (AtlantNIRO), 5 Dm. Donskoy Street, Kaliningrad, 236000, Russia
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Abstract

Population structure of the short-finned squid Illex illecebrosus (Ommastrephidae) was studied on the Nova Scotian shelf between July–September 1984. It was characterized by a prevalence of winter-hatched squid in summer–early autumn, their short (three months of the summer) occurrence on the shelf, and a predominance of females in sex ratios during the feeding period. Ages of squid were estimated by statolith increment counts and ranged from 128 to 201 d. Growth in length was described by linear model with daily growth rates of 0.99 mm/d−1. Adding the length-at-age data from juveniles caught in 1979 to the 1984 data set enabled to construct an ontogenetic growth curve for the winter-hatched squid which was best approximated by the Gompertz growth function.

Type
Brief Report
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 80 , Issue 2 , April 2000 , pp. 367 - 368
Copyright
© 2000 Marine Biological Association of the United Kingdom

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