Journal of Aquaculture (한국양식학회지)

The Korean Society of Fisheries and Aquatic Science (한국양식학회)
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Biological Studies on Aquaculture for Resources Enhancement of Protothaca jedoensis I. Egg Development and Larva Reared

살조개, Protothaca jedoensis 자원조성을 위한 양식생물학적 연구 I. 난발생과 유생사육

  • Yoon, Ho-Seop (Division of Aqua life Science, Yosu National University) ;
  • Kim, Jung (Aquaculture Research Center, Yosu National University) ;
  • Choi, Sang-Duk (Division of Aqua life Science, Yosu National University)
  • 윤호섭 (여수대학교 수산생명과학부) ;
  • 김정 (여수대학교 수산증양식연구센터) ;
  • 최상덕 (여수대학교 수산생명과학부)
  • Published : 2005.11.01
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Abstract

In order to obtain the aquaculture fundamental data far resources enhancelnent of the Protothaca jedoensis, the egg development and larva growth were investigated at different conditions such as water temperature, phytoplankton and density. Water temperature, at which P. jedoensis egg successfully completed development, ranged from $15{\~}30^{\circ}C$. The required time from fertilization to D-shaped larva was 39.7 hours at $15^{\circ}C$, 31.2 hours at $20^{\circ}C$, 26.8 hours at $25^{\circ}C$ and 26.2 hours at $30^{\circ}C$ P. jedoensis. In regard to water temporature, growth and survival rates of larvae were high at $30^{\circ}C$. In growth and survival rates of larvae with various rearing densities, the highest aver-age growth and survival rates were 4${\~}$6 ind./ml When larvae were fed mixed phytoplankton, such as Isochrysis galbana, Pavlova lutheri and Chaetoceros calcitrans, their growth and survival rates were the high among the groups. In growth and survival rates of larvae with various rearing food concentrations, the highest average growth and survival rates were $218{\mu}m$, and $45\%$ at the food concentration of $1{\times}10^4$ cells/ml, respectively.

살조개의 안정적인 인공종묘생산을 위한 기초 연구로서 수온별 난발생, 먹이생물, 밀도에 따른 유생의 성장과 생존율을 조사하였다. 살조개의 발생가능 수은은 $15{\~}30^{\circ}C$인 것으로 나타났으며 초기 D형 유생에 이른시간은 $15^{\circ}C$에서 $30^{\circ}C$까지 각각 39.7, 31.2, 26.8, 26.2시간이 소요되었다 수온별 유생사육에서는 $30^{\circ}C$에서 성장과 생존율이 가장 양호하였다. 사육밀도에 따른 성장과 생존율은 4${\~}$6 ind./ml의 밀도에서 가장 적합한 것으로 나타났다. 식물먹이생물에 따른 성장과 생존율은 Isochrysis galbana, Pavlova lutheri, Chaetoceros calcitrans를 혼합 공급하는 것이 가장 효과적이었다. 먹이생물농도에 따른 성장과 생존율은 $1{\times}10^4$ cells/ml에서 $218{\mu}m$와 $45\%$로 가장 높았다.

Keywords

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