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수온별 조피볼락(Sebastes schlegeli) 치어의 배합사료 적정 공급횟수
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  • 수온별 조피볼락(Sebastes schlegeli) 치어의 배합사료 적정 공급횟수
저자명
이진혁,이봉주,김강웅,한현섭,박건현,이준호,윤현호,배승철,Lee. Jin-Hyeok,Lee. Bong-Joo,Kim. Kang-Woong,Han. Hyon-Sob,Park. Gun-Hyun,Lee. Jun-Ho,Yun. Hyeon
간행물명
한국수산과학회지
권/호정보
2013년|46권 6호|pp.761-768 (8 pages)
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한국수산과학회
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

We conducted two feeding trials to investigate the optimal feeding frequency of juvenile Korean rockfish Sebastes schlegeli fed a commercial diet of expanded pellets containing 47.2% crude protein, 9.2% crude lipid, and 14.5% ash at two different water temperatures. In the first experiment, triplicate groups of 20 fish with an average weight of 2 g were fed an equal amount of diet (5.97% based on body weight) at one of six feeding frequencies (2, 3, 4, 5, 7, or 9 meals/day) for four weeks at $17.5^{circ}C$. After four weeks, we measured weight gain (WG), specific growth rate (SGR), feeding efficiency (FE), and protein efficiency ratio (PER). Fish fed diet five meals/day grew significantly better than those fed nine meals/day. The second experiment used identical experimental conditions and feeding regions, except the food ration was slightly less (5.92% based on body weight) and the water temperature was increased to $20^{circ}C$. After four weeks, we again measured WG, SGR, FE and PER. Fish fed seven meals/day grew significantly faster than those fed 2, 3, 4, or 9 meals/day. Whole-body protein levels in fish fed three meals/day was higher than those fed four meals/day in $17.5^{circ}C$ water, but whole-body lipids in the fish fed four meals/day was higher than those fed two meals/day in $20^{circ}C$ water. A second-order polynomial analysis based on WG suggested the optimal feeding frequency for juvenile Korean rockfish was five meals/day at $17.5^{circ}C$ and six meals/day at $20^{circ}C$, indicating that fish reared in higher water temperature require higher feeding frequencies.