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| Format: | Artículo científico |
| Language: | en |
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Universidad Autónoma de Baja California
2015
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| Online Access: | https://www.redalyc.org/articulo.oa?id=48039202005 |
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Table of Contents:
- Effect of dietary cholesterol content on growth and its accumulation in liver and muscle tissues of juvenile yellowtail kingfish (Seriola lalandi ) Fernando M Guerra-Olvera María Teresa Viana Ciencias de la Tierra cholesterol Yellowtail kingfish g rowth perform ance nutrien t requirements A feed trial conducted with juve nile yellowtai l kingfish ( Seriola lalandi ) was designed to address the effect of dietary cholesterol content on growth performance and the cholesterol concentration in liver and muscle. For 60 days fish were fed four diets base d on defatted fish meal, soy protein concentrate, cholesterol-free fish oil, canol a oil, and olive oil, with four d ifferent concentrations of cho lesterol (treatments Ch0.0 , Ch0.05 , Ch0.12 , and Ch0.19 containing 530, 2880, 4120, and 6170 mg kg –1 of crude fat, respectively). After 60 days, maximum weight gain was obtained with diet Ch0.05 , and it was significant ly higher than that obtained with diets Ch0.0 and Ch0.19 , but not different from that obtained with Ch0.12 . Cholesterol concentration in liver and muscle tissues was not affected by the diet, showing no significant differences among dietary treatments with le vels reported as normal. Though cholesterol biosynthesis could not be measured in the present work, we discuss the possibility that fish are able to synthesize choles terol when fed diets containing no or less cholesterol than req uired, but at the expense of energy consumption, limiting fish growth. We conclud e that cholesterol cont ent in aquafeeds affects fish growth whe n diets are formulated with vegetable ingred ients, and the optimal content should be between 2880 and 4120 mg kg –1 of crude fat to avoid consequent cholesterol accumulation in liver or muscle tissues. 2015 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48039202005 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.2 Vol.41