[논문]Effects of Dietary Protein and Lipid Levels on Growth and Body Composition of Juvenile Far Eastern Catfish Silurus asotus

Kim, Kyoung-Duck; Lim, Sang-Gu; Kang, Yong-Jin; Kim, Kang-Woong; Son, Maeng-Hyun

doi:10.5713/ajas.2011.11089

[국내논문] Effects of Dietary Protein and Lipid Levels on Growth and Body Composition of Juvenile Far Eastern Catfish Silurus asotus 원문보기

Asian-Australasian journal of animal sciences, v.25 no.3, 2012년, pp.369 - 374

Kim, Kyoung-Duck (Aquafeed Research Center, National Fisheries Research and Development Institute) , Lim, Sang-Gu (Inland Aquaculture Research Center, National Fisheries Research & Development Institute) , Kang, Yong-Jin (Inland Aquaculture Research Center, National Fisheries Research & Development Institute) , Kim, Kang-Woong (Aquafeed Research Center, National Fisheries Research and Development Institute) , Son, Maeng-Hyun (Aquafeed Research Center, National Fisheries Research and Development Institute)

Abstract ▼ AI-Helper

A $3{\times}2$ factorial experiment was conducted to determine the effects of dietary protein and lipid levels on the growth and body composition of juvenile far eastern catfish. Six diets were formulated to contain three levels of protein (20%, 30% and 40%) and two levels of lipid (9% and 17%). Triplicate groups of fish (initial body weight of 7.6 g) were hand-fed to apparent satiation for 66 days. Final mean weight was improved with increasing dietary protein and lipid levels, and the highest final mean weight was observed in fish fed the 40/17 (% protein/% lipid) diet. No significant difference was observed in final mean weight for fish fed between 30/17 diet and 40/9 diet. Feed efficiency of fish fed the diets containing over 30% protein levels with 9% and 17% lipid levels were significantly higher than those of fish fed the 20% protein levels. Feed efficiency of fish fed the 30/17 diet was not significantly different from that of fish fed the 40/9 diet or 40/17 diet. Feed efficiency and protein efficiency ratio of fish fed the 20% protein diets with 17% lipid level were significantly higher than those of fish fed 9% lipid diet. Daily feed intake of fish tended to decrease with increasing dietary protein and lipid levels. Moisture content of whole body in fish fed the 9% lipid diets was significantly higher than that of fish fed the 17% lipid diets at the same protein level, but the opposite trends were found for crude lipid content. Significant effects of dietary lipid were observed for most fatty acids, according to their relative values in the diets. The results of this study suggest that the protein requirement for maximum growth of juvenile far eastern catfish may be higher than 40%, and an increase of dietary lipid level from 9% to 17% can improve growth and feed utilization.

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문제 정의

Therefore, this study was conducted to investigate the effects of dietary protein and lipid levels on the growth and body composition of juvenile far eastern catfish.

제안 방법

A 3Χ2 factorial design with three replicates per dietary treatment was used in this study.

대상 데이터

Experimental fish (initial body weight 7.6±0.5 g) were randomly distributed into each of eighteen 1,000 L cylindrical plastic tanks with 60 fish to each tank in semirecirculation system.

데이터처리

If significant (p<0.05) differences were found in factors, Duncan’s multiple range test (Duncan, 1955) was used to rank the means.
The data were subjected to a two-way ANOVA to test the effects of the dietary protein and lipid levels on fish performance. If significant (p<0.

이론/모형

At the end of the feeding trial, five fish in each tank were collected and stored in a freezer at -70℃ for chemical analysis. Crude protein was determined by Kjeldahl method using Auto Kjeldahl System (Gerhardt VAP50OT/TT125, KG, Germany). Crude lipid was determined by ether extraction using Soxhlet extractor (Velp SER 148, Usmate, Italy).

성능/효과

Final mean weight, feed efficiency, protein efficiency ratio, daily feed intake and daily protein intake were significantly affected by both dietary protein and lipid levels (p<0.01).
The results of this study suggest that the protein requirement for maximum growth of juvenile far eastern catfish may be higher than 40%, and increase of dietary lipid level from 9% to 17% can improve growth and feed utilization.
This study showed a lower daily feed intake for fish fed the 17% lipid diets than 9% lipid diets. Similar results of reduced feed consumption of fish fed a high-energy diet compared with a low-energy diet have been reported in other species of fish (Lee and Putnam, 1973; Page and Andrews, 1973; Lee et al.

참고문헌 (25)

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상세보기
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[국내논문] Effects of Dietary Protein and Lipid Levels on Growth and Body Composition of Juvenile Far Eastern Catfish Silurus asotus 원문보기

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[국내논문] Effects of Dietary Protein and Lipid Levels on Growth and Body Composition of Juvenile Far Eastern Catfish Silurus asotus 원문보기

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