The Korean Journal of Malacology (한국패류학회지)
- Volume 20 Issue 1
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- Pages.75-84
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- 2004
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- 1225-3480(pISSN)
Reproductive Cycle and Induced Sexual Maturation of the Pacific Oyster, Crassostrea gigas
참굴, Crassostrea gigas의 생식주기와 성 성숙 유도
- Min, Kwang-Sik (Shellfish Research Center, National Fisheries Research and Development Institute) ;
- Kim, Bong-Seok (Biotechnology Research Center, National Fisheries Research and Development Institute) ;
- Kim, Tae-Ik (Shellfish Research Center, National Fisheries Research and Development Institute) ;
- Hur, Young-Baek (Shellfish Research Center, National Fisheries Research and Development Institute) ;
- Chung, Ee-Yung (School of Marine Life Science, Kunsan National University)
- 민광식 (국립수산과학원 패류연구센터) ;
- 김봉석 (생명공학연구단) ;
- 김태익 (국립수산과학원 패류연구센터) ;
- 허영백 (국립수산과학원 패류연구센터) ;
- 정의영 (군산대학교 해양생명과학부)
- Published : 2004.06.01
Abstract
Reproductive cycle, the condition index, sex ratio of the Pacific oysters, Crassostrea gigas were investigated by histological and morphometric data. The specimens were collected in the two oyster farms of Geoje and Namhae, Gyeongsangnam-do, Korea, from November 1995 to October 1996. Growth of shell length in two regions was similar, but growth of total weight of the oyster in Namhae was faster than that in Geoje oyster farm. The spawning periods in female and male clams were from July to October in Geoje and from June to October in Namhae oyster farm. Ripe oocytes were approximately 50 m in diameter. The reproductive cycle of in females and males in Geoje and Namhae oyster farms can be divided into five successive stages: early developing, late developing, ripe, partially spawned and spent/inactive. Monthly changes in gonad developmental phases showed somewhat different patterns between female and male clams except for the spawning period. On the whole, however, monthly changes in the gonad developmental phases showed a similar pattern in the same sex. The sex ratios of females to males in Geoje and Namhae oyster farms were not significantly different from a 1:1 sex ratio (