한국 남해 서부 연안 출현하는 참조기(Larimichthys polyactis)의 산란생태

초록

The reproductive ecology of the yellow croaker Larimichthys polyactis, was investigated using 380 specimens collected monthly from January to December 2020 (excluding July), from the Western South Sea of Korea. The total length (TL) of L. polyactis ranged from 12.3 to 27.5 cm. We analyzed the monthly changes in sex ratio, gonadosomatic index (GSI), maturity stage and fecundity. The sex ratio differed significantly from what was expected, at 1:0.37 (P<0.05). The spawning period lasted from March to May, as determined by histological observations of female gonadal development and variations in the GSI. Fecundity varied between 8,272 and 70,877 eggs. The relationship between fecundity and TL was expressed as F=88.372TL1.8395. Based on histological analysis, gonadal development was classified into five maturity stages, revealing peak female maturity in March, with spent stages the most frequent in June; males exhibited a comparable seasonal pattern.

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