한국 진해만 해역에 분포하는 개조개, Saxidomus purpuratus의 재생산 연구: 산란 및 군성숙각장
Reproduction study of purplish Washington clam, Saxidomus purpuratus in Jinhae bay, Korea: Spawning and shell length at 50% sexual maturity
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참고문헌
초록
개조개의 생식소발달, 주 산란시기, 50% 군성숙각장 등을 관찰하기 위해 진해만 해역에서 2011년 1월부터 12월까지 잠수기어업을 통해 매월 100개체씩 채집하였다. 조직학적 관찰에 의한 생식소 발달은 초기활성기 (2월-3월), 후기활성기 (1월-3월, 10월-12월), 성숙기 (1월-5월), 산란기 (6월-12월), 그리고 퇴화 및 비활성기 (1월-2월, 11월-12월) 등 5단계로 구분되었다. 산란기는 6월-12월이었고, 주 산란기는 7월-10월이었다. 암컷의 50% 성숙각장은 63.3mm이었고, 성성숙 연령은 2.2세로 추정되었다.
Abstract
This study investigated purplish Washington clam, Saxidomus purpuratus on its gonadal development, reproductive cycle and shell length (age) at 50% female group maturity from January to December 2011 in Jinhae Bay, Korea. This species is dioecious. The gonad index (GI) began to increase in January, reached the maximum value in May and to decrease in June, reached the minimum value in September then to increase slowly in October again. The reproductive cycle of the clams can be divided into five successive stages: the early active stage (Ea, from February to March), the late active stage (La, from January to March and October to December), the ripe stage (R, from January to May), the spawning stage (S, from June to December) and the degenerative and inactive stage (Ia, from January to February and November to December). The spawning periods were from June to December and the main spawning periods were from July to October. The shell length at 50% female group maturity (SL50) was estimated to be 63.6 mm, which can be converted as sexual maturity age of 2.2 year.
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