Journal of the Korean Society of Fisheries and Ocean Technology (수산해양기술연구)

The Korean Society of Fisheries and Ocean Technology (한국수산해양기술학회)
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Reproduction of the Shotted halibut in the southern Korean waters

한국 남해에 서식하는 물가자미, Eopsetta grigorjewi (Herzenstein)의 재생산 연구

  • Cha, Hyung-Kee (Fisheries Resources and Environment Division, Southwest sea Fisheries Research Institute, NFRDI) ;
  • Kang, Su-Kyung (Fisheries Resources Management Division, NFRDI) ;
  • Choi, Jung-Hwa (Fisheries Resources Management Division, NFRDI) ;
  • Oh, Taeg-Yun (Fisheries Resources Management Division, NFRDI) ;
  • Seo, Young-Il (Fisheries Resources and Environment Division, Southwest sea Fisheries Research Institute, NFRDI)
  • 차형기 (국립수산과학원 남서해수산연구소 자원환경과) ;
  • 강수경 (국립수산과학원 자원연구과) ;
  • 최정화 (국립수산과학원 자원연구과) ;
  • 오택윤 (국립수산과학원 자원연구과) ;
  • 서영일 (국립수산과학원 남서해수산연구소 자원환경과)
  • Received : 2011.03.03
  • Accepted : 2011.05.25
  • Published : 2011.08.31
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Abstract

Maturation and spawning of the Shotted halibut, Eopsetta grigorjewi was investigated based on the samples captured in South Korean waters from January 2008 to December 2009. Gonadosomatic index began to increase in December, and reached maximum between January to March. After spawning it began to decrease from May. Reproductive season was estimated to January-April, with peak in February. Fecundity was proportional to the size of the female, with the clutch size varying from 170,000 eggs in the smallest female (total length, 28.9cm) to 1,300,000 eggs in the largest (total length, 41.5cm). Size at 50% sexual maturity (TL50), determined from mature females, was 28.8cm. Annual reproductive cycles of this species could be divided into six successive stages; immature stage (May-October), nucleolus stage (November-January), yolk vesicle stage (January-February), vitellogenic and ripe stage (January-April) and spent stage (April-May).

Keywords

References

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