plSSN : 0374-8111 | elSSN : 2287-8815
plSSN : 0374-8111 | elSSN : 2287-8815
plSSN : 0374-8111elSSN : 2287-8815
윤병일·고수진·이수정·권대현·최동혁*
국립수산과학원 서해수산연구소 기후환경자원과
The Asian Paddle Crab Charybdis japonica is an economically important species of crustacean inhabiting the waters of the West Sea of Korea. This study investigated the gonadal development of C. japonica and size at group maturity. Between March 2022 and November 2023, a total of 1,310 specimens were collected from the central region of the West Sea. The gonadal somatic index of the specimens was found to peak in June. Analysis of the gonad tissue and the frequency of appearance of ovigerous crabs indicated that the main spawning period occurs from June to August. Additionally, monthly egg diameter measurements revealed that Asian paddle crabs spawn multiple times annually. Given the current decline in the catches of sea crabs in the West Sea of Korea, we recommend continuous monitoring of the maturity and spawning of crabs in this marine environment.
Asian paddle crab, Charybdis japonica, Spawning season, Deokjeok Islands