한국양식학회지 (Journal of Aquaculture)

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

농어, Lateolabrax japonicus 유어의 성장에 있어 사육 수온의 영향

Influence of Water Temperature on Growth of Yearling Sea Bass, Lateolabrax japonicus in Indoor Tank

  • 강덕영 (국립수산과학원 서해수산연구소) ;
  • 한형균 (국립수산과학원 어류양식연구센터) ;
  • 전창영 (국립수산과학원 연구기획실)
  • 발행 : 2004.11.01
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초록

본 연구에서는 우리나라 남동해 연안에서 4계절 동안 나타나는 전형적 수온 범위(3~33$^{\circ}C$)에서 양성용 농어의 사료 섭식량 및 효율,성장,생존 등에 있어 수온의 영향을 파악해 보고, 양성시 농어의 최적 사육수온 조건을 구명하고자 실시하였다. 실험 결과,농어는 수온 범위 6-3$0^{\circ}C$적정한 어종으로 판단되지만, 사료섭식량, 사료효율, 성장, 생존을 동시에 고려했을 때, 정상적인 양성을 위해서는 동절기 수온을 17$^{\circ}C$이상 유지하는 것이 정상적인 성장을 유지해 줄 수 있으며, 하절기의 경우 수온 21-27$^{\circ}C$가 적정 한 것으로 판단된다.

Two experiments were conducted to study the effect of temperature on growth and survival of yearling sea bass, Lateolabrax japonicus reared from 3$^{\circ}C$ to 33$^{\circ}C$. In the I st experiment, we used yearlings fish averaging 19.2$\pm$0.2 cm/fish (Mean$\pm$S.E.M.) of total length (TL) and 67.0$\pm$1.8 g/fish (Mean$\pm$S.E.M.) of body weight (BW), and we cultured the fish at 3, 6, 9, 12 and 17$^{\circ}C$ for 90 days. In the 2nd experiment, the experimental fish averaging 24.9$\pm$0.1 cm/fish (Mean$\pm$S.E.M) of TL and I 46.4$\pm$3.0 g/fish (Mean$\pm$S.E.M) of BW were reared at 21,24,27,30 and 33$^{\circ}C$ for 90 days. During these experiments, we measured food intake, feed efficiency, survival and growth (TL and BW) in the both experiments. Although food intake of the yearling increased with the temperature, the feed efficiency was only enhanced within the temperature range, from 21 to 27$^{\circ}C$. Growth of yearling was normal within the temperature range from 17 to 3$0^{\circ}C$, but it was stoped or reduced in other temperatures. Survival rate was significantly reduced in 3$^{\circ}C$ from the 1st experiment and in 30 and 33$^{\circ}C$ from the 2nd experiment, but there was no significant difference among other groups.

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