Korean Journal of Ecology and Environment (생태와환경)

The Korean Society of Limnology (한국수생태학회)
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Egg Development and Early Life History of the Endangered Species Gobiobotia brevibarba (Pisces: Cyprinidae)

멸종위기 어류 돌상어 Gobiobotia brevibarba의 난발생 및 초기생활사

  • Ko, Myeong-Hun (Department of Marine Biotechnology, Soonchunhyang University) ;
  • Park, Sang-Yong (Department of Marine Biotechnology, Soonchunhyang University) ;
  • Lee, Ill-Ro (Department of Marine Biotechnology, Soonchunhyang University) ;
  • Bang, In-Chul (Department of Marine Biotechnology, Soonchunhyang University)
  • 고명훈 (순천향대학교 자연과학대학 해양생명공학과) ;
  • 박상용 (순천향대학교 자연과학대학 해양생명공학과) ;
  • 이일로 (순천향대학교 자연과학대학 해양생명공학과) ;
  • 방인철 (순천향대학교 자연과학대학 해양생명공학과)
  • Received : 2011.02.15
  • Accepted : 2011.05.23
  • Published : 2011.06.30
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Abstract

Early life history of the endangered species Gobiobotia brevibarba was investigated to provide baseline data for biological characteristics and restoration. Adult fish were sampled by spoon net capture at Hongcheon-gun, Gangwon-do, Korea, in April 2010. Eggs were obtained after injection of Ovarprim and were artificially fertilized by the dry method in the laboratory. The mature eggs were slightly adhesive and transparent with greyish and average $1.24{\pm}0.07$ mm in diameter. The hatching of the embryos took place about 120 h after fertilization at a water temperature of $23^{\circ}C$. The newly-hatched larva averaged $5.5{\pm}0.29$ mm in total length. Four days after hatching, they averaged $7.4{\pm}0.26$ mm in total length and their yolk sacs were completely absorbed. From 15 days after hatching, they entered the juvenile stage and reached $9.9{\pm}0.72$ mm in total length. One hundred days after hatching, their band patterns and external form were similar to those of adults, and they averaged $36.0{\pm}3.11$ mm in total length.

멸종위기종 돌상어 Gobiobotia brevibarba의 초기생활사에 대한 연구는 생물학적 특성 및 복원의 기초자료를 확보하기 위해 2010년 4월부터 6월까지 강원도 홍천군에서 성숙한 개체를 채집하여 난발생 및 초기생활사를 조사하였다. 채집된 성숙한 암컷과 수컷은 Ovaprim을 주사한 후 건식법으로 인공수정시켰다. 성숙란은 약한 접착성을 띤 투명한 회색난이었으며, 난경은 $1.24{\pm}0.07$ mm 였다. 수온 $23^{\circ}C$에서 수정 후 120시간 후에 부화하였으며, 부화 직후 전기자어는 전장 $5.5{\pm}0.29$ mm였다. 부화후 4일만에 난황을 모두 흡수하였으며 전장 $7.4{\pm}0.26$ mm로 성장하였고, 부화 후 15 일에는 전장 $9.9{\pm}0.72$ mm로 모든 지느러미 기조가 정수가 되어 치어기로 이행하였다. 부화 후 100 일 후에는 전장 $36.0{\pm}3.11$ mm로 체측반문과 외부형태가 성어와 유사한 모습을 보였다.

Keywords

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