Fecundity of the chokka squid Loligo vulgaris reynaudii on the southeastern coast of South Africa |
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| Authors: | W H H Sauer Y C Melo W de Wet |
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| Institution: | (1) Department of Ichthyology and Fisheries Science, P.O. Box 94, Rhodes University, Grahamstown, 6140, Republic of South Africa, ZA;(2) Sea Fisheries Research Institute, Private Bag X2, Roggebaai, 8012, Cape Town, Republic of South Africa, ZA;(3) Port Elizabeth Museum, P.O. Box 13147, Humewood, 6013, Port Elizabeth, Republic of South Africa, ZA |
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| Abstract: | Potential fecundity in Loligo vulgaris reynaudii was estimated to be about 17 000 eggs, calculated as the total number of discernible oocytes in the ovary and oviduct. Squid
were observed to spawn up to 8140 eggs over a 36 h period in captivity. First estimations of actual fecundity are therefore
between 8000 and 17 000 eggs. Factors complicating a more accurate estimation of actual fecundity in this species include
difficulties with aquarium maintenance, their behaviour of spawning over a protracted period and in multiple sites, and atretic
oocytes observed in both developing and mature ovaries. Detailed morphological and histological analysis of gonads collected
at regular intervals over a complete spawning season will allow a more precise calculation of actual fecundity.
Received: 9 October 1998 / Accepted: 22 April 1999 |
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