한국양식학회지 (Journal of Aquaculture)

한국양식학회 (The Korean Society of Fisheries and Aquatic Science)
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치어기 조피볼락의 사료내 에너지와 단백질함량에 따른 성장, 호흡 및 생태효율에 미치는 영향

Effects of Dietary Energy and Protein Levels on Growth, Respiration and Growth Efficiency of Juvenile Rockfish (Sebastes schlegeli)

  • 발행 : 2003.05.01
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초록

본 연구는 조피볼락 치어를 대상으로 성장, 호홉 및 생태효율을 조사하여 에너지 흐름에 대한 생리적 기초자료를 얻고자 수행하였다. 실험사료는 2가지 에너지 수준인 3000 및 4000 kcal에 대한 각각의 단백질 함량인 40%와 50%로 적용하여 설계되었으며, 실험어는 평균 체중 35.6$\pm$0.4g의 조피볼락 치어를 40 L FRP 사각수조에 10마리씩 2가지 사료구(사료구 1과2)로 나누어 각 사료구 당 4반복으로 무작위 배치하였다. 실험 종료후, 증체율과 사료효율에 있어서는 사료구 2가 사료구 1 보다 유의적으로 높게 나타났다. 산소소비(호홉)는 두 사료구에 있어서 어체중이 증가할수록 지수적으로 증가하는 경향을 나타내었으며, 사료구 1과 2는 y=0.3218 $e^{0.0592x}$ ($R^2$=0.8494)와 y=0.3612 $e^{0.0532x}$ ($R^2$=0.8805)로 각각 나타났다. 사료구 1의 동화효율, 총성장효율 및 순성장효율은 각각 67.4%, 14.5% 및 21.4%로 나타났으며, 사료구 2는 각각 73.8%, 16.0% 및 22.6%로 나타났다. 따라서, 상기 결과를 토대로 조피볼락에 있어서 4000 kcal에 대한 단백질 함량 50% 사료구는 성장, 호흡 및 생태효율에 좋은 결과를 도출하였다.

Diets containing 3000 kcal/kg at the crude protein (CP) level of 40% (Diet 1) and 4000 kcal/kg at the CP level of 50% (Diet 2) were fed to the juvenile rockfish, Sebastes schlegeli (35.6 g) at 3-4% body weight for a period of 28 days. Diet 2 promoted significantly higher growth and feed efficiency than Diet 1. Oxygen uptake increased with increasing body weight. The oxygen uptake-body weight relationship of diets 1 and 2 were best expressed by y=0.3218 $e^{0.0592x}$ (R=0.8494) and y=0.3612 $e^{0.0532x}$ ($R^2$=0.8805), respectively. Assimilation efficiency (AE), gross growth efficiency ( $K_1$) and net growth efficiency ( $K_2$) of the fish fed on Diet 2 were 73.8, 16.0 and 22.6%, respec- tively. Fish fed on Diet 2 showed significantly higher AE, $K_1$ and $K_2$ than those fed on Diet 1. Hence Diet 2 con- taining 4000 kcal/ kg with crude protein of 50% is recommended for the Korean rockfish.kfish.

키워드

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