广东海洋大学学报Issue(6)：30-36,7.
饲料中豆粕含量对军曹鱼幼鱼碳、氮稳定同位素分馏的影响
Effects of Diet Soybean Protein Concentration on Carbon and Nitrogen Isotope Fractionation of Juvenile Cobia (Rachycentron canadum L.)
摘要
Abstract
In order to investigate the effects of diet soybean protein concentration on carbon and nitrogen isotope fractionation of juvenile cobia (Rachycentron canadum L.), three isonitrogenous and isocaloric diets were formulated: the protein source in D1 was fish meal, soybean meal protein replaced 10%and 20%fish meal in D2 and D3, and the diets were fed to juvenile cobia (21.34±1.54 g) for 24 days. The results showed that, with the extending of experiment time, the δ13C of cobia increased and δ15N decreased. Although the changing speed of δ13C and δ15N were different. The whole fish and muscle of cobia fed with different diets had reached isotope equilibrium with their diet when the feeding experiment accomplished, except for D3 muscle. The Δ13C and Δ15N of cobia whole fish and muscle increased with protein concentrationin soybean diet.Δ13C increased from 4.19‰and 5.04‰, and Δ15N increased from 0.18‰to 2.20‰. The Δ13C and Δ15N of cobia whole fish and muscle were similar, but the changing speed of cobia whole fish and muscle δ13C and δ15N were different. This indicated that muscle can represent the isotope character of cobia whole fish in trophic level study of ecosystem (long time scale), but can not represent the isotope character of whole fish in physiology study (short time scale).关键词
军曹鱼幼鱼/饲料/豆粕蛋白/碳稳定同位素/氮稳定同位素/同位素分馏Key words
Rachycentron canadum/diet/soybean meal protein/δ13C/δ15N/isotope fractionation分类
农业科技引用本文复制引用
张泽钊,周晖,施钢,陈刚..饲料中豆粕含量对军曹鱼幼鱼碳、氮稳定同位素分馏的影响[J].广东海洋大学学报,2013,(6):30-36,7.基金项目
广东省海洋与渔业科技项目（A2009-08D03、A2010-08D04）；广东省科技计划项目（2009B020308005、2010B080203044,2011B020307012）；国家海洋公益性行业科研专项（201205028）；广东海洋大学大学生研究创新性实验项目 （）
