Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
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Sexual Maturity of Raja koreana (Elasmobranchii, Rajoidei) from Korea

한국산 고령홍어의 성성숙

  • Kim, Jin Koo (Fisheries Resources Research Team, National Fisheries Research and Development Institute) ;
  • Sim, Doo Saing (Inland Aquaculture Research Institute, National Fisheries Research and Development Institute) ;
  • Jeong, Soo Dong (Mokpo Maritime University)
  • 김진구 (국립수산과학원 자원연구팀) ;
  • 심두생 (국립수산과학원 내수면양식연구소) ;
  • 정수동 (목포해양대학교)
  • Received : 2005.10.03
  • Accepted : 2005.12.02
  • Published : 2005.12.31
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Abstract

Sexual maturity of Korean skate, Raja koreana, was investigated based on 89 specimens caught between September 2002 and December 2003 in the southwestern sea of Korea. Clasper development was slow between 35 cm and 52.5 cm TL, increased abruptly between 59.5 cm and 71 cm TL, and thereafter decreased, showing an overall sigmoidal growth pattern. Unlike other skates and sharks, Korean skate males were already histologically mature before the claspers lengthened. Although the egg capsules were found in May and November in Korean skate females, histological findings indicated that spawning occurred throughout the year except summer in females but all the time in males.

2002년 9월부터 2003년 12월 동안 한국 남서부해역에서 어획된 고려홍어 (Raja koreana) 89마리를 대상으로 그들의 생식소 발달과정을 조직학적으로 조사하였다. 수컷의 교미기는 전장 35cm에서 52.5 cm 사이에서 느리게 성장하다가 59.5 cm부터 71 cm 사이에서 갑자기 빨라졌고 이후 다시 감소하는 시그모이드 성장패턴을 보여 주었다. 다른 홍어류 및 상어류와 달리 고려홍어 수컷은 교미기가 길어지기 전에 조직학적으로 이미 성숙한 상태였다. 비록 고려홍어 암컷에서 난각이 5월과 11월에만 발견되었지만 조직학적으로 암컷은 여름을 제외한 연중 방란이 가능하고 수컷은 연중 방정이 가능한 것으로 나타났다.

Keywords

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