[논문]The Effects of Different Feeding Strategies on the Growth of Young Nile tilapia, Oreochromis niloticus L., in a Freshwater Recirculating System during Summer

Cho Sung Hwoan; Jo Jae Yoon

doi:10.5657/fas.2005.8.1.038

The Effects of Different Feeding Strategies on the Growth of Young Nile tilapia, Oreochromis niloticus L., in a Freshwater Recirculating System during Summer 원문보기

Journal of fisheries science and technology, v.8 no.1, 2005년, pp.38 - 42

Cho Sung Hwoan (Division of Marine Environment and Bio Science, College of Ocean Science and Technology, Korea Maritime University) , Jo Jae Yoon (Department of Aquaculture, Pukyong National University)

Abstract ▼ AI-Helper

We evaluated the effects of different feeding strategies on the growth of young Nile tilapia, Oreochromis niloticus L., in a freshwater recirculating system during summer. Each of twenty fish (Mean body weight$\pm$ SD; 37. 7$\pm$0.10 g) were randomly distributed into each of 24 tanks. Eight treatments were prepared in triplicate. Control fish were hand-fed commercial feed twice daily without starvation. The other seven treatments employed different feeding and starvation strategies ranging from I day starved and 1 day fed (1DS+ 1DF) to 7 days starved to 7 days fed (7DS+7DF). All fish survived to the end of the 44-day feeding trial. The amount of food supplied was highest for the control fish in the control. Food supplied to fish in the 3DS+3DF and 4DS+4DF treatments was significantly lower than that of fish in the 1DS+1DF and 2DS+2DF treatments, but significantly higher than that of fish in the 5DS+5DF, 6DS+6DF and 7DS+7DF treatments. The weight gain of control fish was significantly higher than that of fish in other treatments. Feed efficiency ratio (FER) for fish in the 7DS+7DF treatment was significantly higher than that of fish in the control group, but it did not differ from that of fish in the 1DS+1DF and 2DS+2DF treatments. We concluded that young Nile tilapia raised with different starvation and feeding regimes during the summer in a freshwater recirculating system did not catch up in growth to fish fed daily. However, the enhanced FER of Nile tilapia in the 7DS+ 7DF, 2DS+ 2DF, and 1 DS+ I DF treatments partly explains the compensatory growth of the fish, although their weight gain was relatively low.

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문제 정의

However, no study has examined the effects of different feeding strategies on the growth of Nile tilapia. Our objective was to determine these effects on the summer growth of young Nile tilapia using a recirculating system.

제안 방법

, Korea). Seven treatments consisted of various starvation and feeding regimes: 1 day starved and 1 day fed (1DS+1DF), 2 days starved and 2 days fed (2DS+2DF), 3 days starved and 3 days fed (3DS+3DF), 4 days starved and 4 days fed (4DS+4DF), 5 days starved and 5 days fed (5DS+ 5DF), 6 days starved and 6 days fed (6DS+6DF) and 7 days starved to 7 days fed (7DS+7DF).
Eight treatments in triplicate were used. The control tilapia were hand-fed twice daily 7 days a week at 09:30 and 17:30 with commercial feed containing 30% crude protein and 4% crude lipid (Woosung Feed Co. Ltd., Korea). Seven treatments consisted of various starvation and feeding regimes: 1 day starved and 1 day fed (1DS+1DF), 2 days starved and 2 days fed (2DS+2DF), 3 days starved and 3 days fed (3DS+3DF), 4 days starved and 4 days fed (4DS+4DF), 5 days starved and 5 days fed (5DS+ 5DF), 6 days starved and 6 days fed (6DS+6DF) and 7 days starved to 7 days fed (7DS+7DF).

대상 데이터

The feeding trial was conducted in a freshwater recirculating system at Pukyong National University, Busan, Korea. Twenty-four rectangular glass tanks (60x90x60 cm water volume, 220 L) were used, and the water exchange rate per tank was 10 L/min. Each tank received 20 randomly distributed fish (mean body weight±SD; 37.

데이터처리

All data were statistically analyzed by one-way ANOVA and Duncan's multiple range test (Duncan, 1955) at the significance level of P=0.05, using SAS version 6.12 (SAS Institute, Cary, NC, USA).

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상세보기
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DOI : 10.5657/fas.2005.8.1.038 [무료]
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