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

The Korean Society of Fisheries and Ocean Technology (한국수산해양기술학회)
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Reproductive ecology of the sharp toothed eel in the southern Korean waters

한국 남해에 서식하는 갯장어, Muraenesox cinereus (Forsskal)의 생식생태

  • Cha, Hyung Kee (Subtropical Fisheries Research Center, Southwest sea Fisheries Research Institute, NFRDI) ;
  • Seo, Young Il (Fisheries Resources Management Division, NFRDI) ;
  • Oh, Taeg Yun (Fisheries Resources Management Division, NFRDI) ;
  • Kim, Heeyong (Fisheries Resources and Environment Division, Southwest sea Fisheries Research Institute, NFRDI) ;
  • Lee, Sun Gil (Fisheries Resources and Environment Division, Southwest sea Fisheries Research Institute, NFRDI) ;
  • Choi, Mun Sung (Fisheries Resources and Environment Division, Southwest sea Fisheries Research Institute, NFRDI)
  • 차형기 (국립수산과학원 남서해수산연구소 아열대수산연구센터) ;
  • 서영일 (국립수산과학원 자원관리과) ;
  • 오택윤 (국립수산과학원 자원관리과) ;
  • 김희용 (국립수산과학원 남서해수산연구소) ;
  • 이선길 (국립수산과학원 남서해수산연구소) ;
  • 최문성 (국립수산과학원 남서해수산연구소)
  • Received : 2012.07.13
  • Accepted : 2012.08.07
  • Published : 2012.08.31
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Abstract

Reproductive ecology of the sharp toothed eel, Muraenesox cinereus was investigated based on the samples captured in southern Korean waters from January 2010 to December 2011. Gonadosomatic index began to increase in April, and reached maximum between July to August. After spawning it began to decrease from October. Reproductive season was estimated to April-September, with peak in July. Fecundity was proportional to the size of the female, with the clutch size varying from 56,000 eggs in the smallest female (anal length, 27.0cm) to 1,400,000 eggs in the largest (anal length, 49.5cm). Size at 50% sexual maturity ($AL_{50}$), determined from mature females, were 21.9cm. Annual reproductive cycles of this species could be divided into four successive stages; immature stage (October-February), maturing stage (March-May), mature stage (June-August) and spent stage (August-October).

Keywords

Acknowledgement

Grant : 남해연안어업 및 환경생태연구

Supported by : 국립수산과학원

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