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Sexual maturation and the duration of repeated maturation of genital products in the female sterlet acipenser ruthenus of the volgograd reservoir ussr






Zoologicheskii Zhurnal 56(6): 894-900

Sexual maturation and the duration of repeated maturation of genital products in the female sterlet acipenser ruthenus of the volgograd reservoir ussr

The pectoral fin 1st rays were collected from 519 females during 1960-1973, including 349 females at stage IV of maturity and 170 females over 50 cm in length at stages VI-III. It was established, by the method of Roussow, that the genital products matured once in 369 females, twice in 125, thrice in 18 and 4 times in 7. Sexual maturation of females is attained at age 7-20 yr (10.4 average) and length of 35-85 cm; in the majority it is attained at 8-12 yr and 42-70 cm. The duration of repeated maturation varies from 3-11 yr (5-5.9 yr average). The age of sexual maturation is not related to the mean indices of duration of repeated maturation and the growth before and after maturation.


Accession: 006408749



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