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Sexual maturity and spawning season of Japanese flounder in Suo-Nada
Nippon Suisan Gakkaishi
Since 1972, the catch of flatfish in Suo-Nada decreased dramatically, and the catch in 1984 was only 52% of that in 1972. This paper presents the biological parameters for stock assessment for Japanese flounder in Suo-Nada, that is, age and body length at sexual maturity, main spawning season, maturity rate by age, and evaluation of the degree of sexual maturity which were mainly based on the data from 1980 to 1985. The combination of maturity factor [103×gonad weight(g)/body weight withoutdoi:10.2331/suisan.53.1181 fatcat:x7dj44iwzvcjxmd4icya5247t4