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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/43493

Title: Effects of dietaryL-carnitine, plant proteins and lipid levels on growth performance, body composition, blood traits and muscular carnitine status in juvenile silver perch(Bidyanus bidyanus)
Authors: Yang, Shuenn-Der;Fu-Guang Liu;Chyng-Hwa Liou
Contributors: 國立臺灣海洋大學:水產養殖學系
Keywords: Silver perch (Bidyanus bidyanus);l-Carnitine;Plant proteins;High lipid level
Date: 2012-04
Issue Date: 2017-08-29T08:28:11Z
Publisher: Aquaculture
Abstract: Abstract:This study was carried out to understand the possible effects of supplemental dietary l-carnitine on the growth, body composition, blood traits and carnitine status in silver perch. A 2 × 2 × 2 factorial design was utilized to formulate the experimental diets, which contained plant protein sources to replace 0 or 70% of fish meal protein with 10 or 18% dietary lipid were supplemented with or without l-carnitine at 400 mg kg− 1. The juvenile fish (mean weight: 9.67 ± 1.04 g) were fed one of these isonitrogenous and isocaloric diets in triplicate for 10 weeks. Results showed that supplemental dietary l-carnitine significantly enhanced growth performance and feed utilization, meanwhile the addition of l-carnitine to the diet that was low in fishmeal and low in fat resulted in a lowering of ammonia excretion and a higher feed efficiency. The dietary lipid level significantly influenced the hepatosomatic index, viscerosomatic index and intraperitoneal fat ratio, while the intraperitoneal fat ratio of silver perch was noticeably reduced by the addition of l-carnitine in diets. The total plasma lipid, triacylglycerols and cholesterol values of the fish were altered by the dietary protein source or the dietary lipid level, but the effect of l-carnitine supplementation on the blood traits was unclear. Lipid contents of whole body and dorsal muscle were increased in the fish fed diets with the higher lipid level, whereas supplemented dietary l-carnitine significantly reduced the lipid contents of the whole fish. The concentrations of free carnitine and acid soluble carnitine in the muscle were higher in the silver perch that received diets supplemented with l-carnitine. The observations of this study revealed positive effects of l-carnitine supplemented in diets on growth enhancement, increases in muscular carnitine status, reduction of intraperitoneal fat ratio and the whole-body lipid contents in silver perch.
Relation: 342-343, pp.48-55
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/43493
Appears in Collections:[水產養殖學系] 期刊論文

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