Journal of Aquaculture (한국양식학회지)

The Korean Society of Fisheries and Aquatic Science (한국양식학회)
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Early Growth and Gonadal Development of Triploid Rainbow Trout, Salmo gairdneri

3배체 무지개송어의 초기성장과 생식소 발달에 관하여

  • KIM Dong Soo (Department of Biological Science and Technology, National Fisheries University of Pusan) ;
  • KIM In-Bae (Department of Aquaculture, National Fisheries University of Pusan) ;
  • BAIK Yun Gul (Aquaculture Research Station, Horim Fisheries Company)
  • 김동수 (부산수산대학 생물공학과) ;
  • 김인배 (부산수산대학 양식학과) ;
  • 백윤걸 (호림수산 양식개발연구소)
  • Published : 1988.11.01
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Abstract

Experiments were carried out to examine early life history, growth and gonadal development of triploid rainbow trout to evaluate their suitability for commercial aquaculture. A high degree ($96.5\%$) of triploid fish was induced when the fertilized eggs were treated with heat shock. Mean embryonic development time of triploids was slightly shorter than diploids and survival rate of triploid at swim-up was $80.2\%$ relative to control. Erythrocytes and their nuclei of triploid were larger in both axes than those of diploid. Triploid rainbow trout showed improved growth relative of diploid after 1 year of age. Histological analysis of the gonads revealed sterility in triploid fish.

3배체 무지개 송어의 산업적 유용성을 검토하기 위하여 3배체 유도율, 부화 소요시간, 생존율, 세포의 크기, 성장 및 생식소 형성 등을 조사하였다. 그 결과 $96.5\%$의 3배체가 유도되었으며 부화까지 소요시간은 3배체가 2배체에 비해 약간 빨랐고 생존율은 대조군의 $80.2\%$에 달하였다. 세포의 크기는 장, 단축 모두 대체로 1.2$\~$1.3배정도 3배체가 컸으며 성장은 초기에는 2배체가 약간 빨랐으나 부화후 1년이 지나면 3배체가 대조군보다 성장율이 증가되었다. 조직학적 분석결과 3배체의 경우 성숙기에 도달하여도 생식소가 성숙되지 않았다.

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