Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Sexual Maturity and Reproductive Cycle of the Common Squid Todarodes pacificus in the East Sea of Korea

한국 동해 해역에서 채집된 살오징어 (Todarodes pacificus)의 성성숙과 생식주기

  • Baek, Hea-Ja (Department of Marine Biology, Pukyong National University) ;
  • Kim, Jae-Won (Department of Marine Bio-resources, Kangwon Provincial University) ;
  • Cho, Yun-Jung (Department of Marine Biology, Pukyong National University) ;
  • Kim, Su-Am (Department of Marine Biology, Pukyong National University)
  • 백혜자 (부경대학교 자원생물학과) ;
  • 김재원 (강원도립대학 해양생물자원개발과) ;
  • 조윤정 (부경대학교 자원생물학과) ;
  • 김수암 (부경대학교 자원생물학과)
  • Published : 2006.12.31
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Abstract

The sexual maturity and reproductive cycle of the common squid, Todarodes pacificus captured from the East Sea, Korea, between January 2004 and January 2006, were investigated by documenting changes in the gonadosomatic index (GSI), gonad development, and oocyte size frequency distribution. The GSI of females began to increase in July, reached a maximum in August, and then gradually decreased. The GSI of males increased from July to March. Using gonad histological observations, we identified four oocyte developmental stages. The changes in GSI and gonad tissue resulted in the classification of the annual reproductive cycle into the following four successive stages: immature (April to June), growing (June to July), mature (July to August), and ripe and spawning (August to March). According to the oocyte diameter size frequency distribution in the ovary, this species appeared to have asynchronous oocyte development and one spawning time.

Keywords

References

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