Sexual Maturation and Sex Ratio in Pacific Cod Gadus macrocephalus (Gadidae) in Waters of Primorye (Sea of Japan)


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Abstract

Fifty percent of Pacific cod Gadus macrocephalus males reach sexual maturity in waters of Primorye at the age of 2+, while the age of female sexual maturation is 4+; 100% sexual maturation occurs at the age of 6+ and 7+, respectively. According to the long-term average data, the general number of males is 1.2 times larger than that of females in the population; among mature individuals, the number males is 1.7 times larger than females, which is required for successful spawning.

About the authors

A. N. Vdovin

All-Russia Research Institute of Fisheries and Oceanography, Pacific Branch

Author for correspondence.
Email: vdovinan1955@mail.ru
Russian Federation, Vladivostok

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