한국양식학회지 (Journal of Aquaculture)

한국양식학회 (The Korean Society of Fisheries and Aquatic Science)
권호 표지

기수재첩, Corbicula Japonica의 인공종묘생산

Production of Artificial Seedling of the Brackish water Clam, Corbicula jeponica

  • 김완기 (국립수산진흥원 강릉수산종묘시험장) ;
  • 이채성 (국립수산진흥원 강릉수산종묘시험장) ;
  • 이정용 (국립수산진흥원 강릉수산종묘시험장) ;
  • 허성범 (부경대학교 양식학과)
  • Kim, Wan-Ki (Gangnung Marine Hatchery, National Fisheries Research and Development Institute) ;
  • Lee, Chae-Sung (Gangnung Marine Hatchery, National Fisheries Research and Development Institute) ;
  • Lee, Jeong-Yong (Gangnung Marine Hatchery, National Fisheries Research and Development Institute) ;
  • Hur, Sung-Bum (Department of Aquaculture, Pukyong National University)
  • 발행 : 2002.02.01
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초록

기수재첩의 인공 종묘생산 기술개발의 일환으로 산란기 조사, 산란유발, 난 발생 및 유생의 발달 과정을 관찰 한 결과를 요약하면 다음과 같다. 기수재첩의 산란기는 7월 하순부터 9월 하순가지이며, 주 산란기는 8월 초순부터 9월 중순으로 나타났다. 산란유발은 자외선 조사 자극과 생식소절개 방법으로는 반응이 전혀 없었다. 3$\textperthousand$ 해수의 온도 자극에서는 8월하순에 90.0%, 9월에 75.0%의 높은 반응률을 보였다. NH$_4$OH용액을 3$\textperthousand$ 해수에 첨가하는 자극은 1/1000∼3/1000 N에서 15∼45%의 반응률을 보였다. 기수재첩의 수정난은 직경 86${\pm}$3 um의 구형이다. 수정난의 발생은 23.0∼24.5$^{\circ}C$에서 2시간 후 4세포기로 되고, 15시간이 지나면 담륜자 유생 (trochophore larvae),수정 후 2일째에는 D상 유생, 9일째에는 각정기로 성장하였다. 수정 16일째에는 성숙 유생으로 성장하여 저서 생활을 시작하였다.

To develop techniques for the production of artificial seedling of Corbicula japonica, protocols for induction of spawning and larval development were developed. During the assumed spawning period of August to mid-September, attempts were first made to induce spawning by gonadal incision and UV-irradiation but all in vain. At the end of August, elevated thermal induction evoked 90 % positive response in animals maintained at $3\textperthousand$ salinity. Immersion in (1/1000~3/1000 N) ammonium hydroxide ($NH_4$OH) also induced spawning in 15~45%) of the treated animals at $3\textperthousand$ salinity. Fertilized eggs measured 86$\mum. At 23.0~24.5$^{\circ}C$, the fertilized egos developed into 4-cell stage embryos within 2 hours, trochophores 15 hours, D-shaped larvae 2 days, umbo 9 days and fully grown veligers, ready to infiltrate into the sediment, within 16 days.

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