水生生物学报2018，Vol.42Issue(4)：744-750,7.DOI:10.7541/2018.091
两种油脂水平下DHA强化对饥饿鲤体重及脂代谢的影响
THE EFFECT OF DHA FORTIFICATION ON BODY WEIGHT LOSS AND LIPID METABOLISM OF STARVED COMMON CARP ( CYPRINUS CARPIO L.) IN TWO DIETARY LIPID LEVELS
摘要
Abstract
Starvation is a special period when fish cannot effectively obtain food, resulting to some problems (i.e., lack of energy required). DHA (Docosahexaenoic acid), being highly unsaturated fatty acids retained in body during starva-tion, is postulated to contain special energy regulation effect on the starving fish body. To explore the effect of DHA fortification on body weight loss and lipid metabolism of starved common carp (Cyprinus carpio L.) in two die-tary lipid levels, a feeding trail, which followed with starvation, was conducted. Firstly, 3% DHA product was added to 6% and 12% lipid levels diets to formulate four different kinds of diet respectively, (i.e., basic diet, basic-DHA diet, high lipid diet, and high lipid-DHA diet). A total of 360 common carp (14.81±0.13) g/tail were randomly divided into four groups (triplicate per each group), fed with four diets and reared in a recycling water rearing tanks, respectively. After 74 days of feeding, some fish per each tank were sampled and eventually 6 fish per each tank were left to endure 36 days of starvation. Then, all staved fish were sampled and weight of fish and the relative indexes were determined. Result showed that the body weight loss ratio of fish in DHA groups was significantly higher than that of the non-DHA groups in the same lipid level. Besides, the hepatocyte diameter and lipid content in muscle and intestine of starved fish in DHA groups were remarkably lower than that of the non-DHA groups (P＜0.05). The lipid content in hepatosomatic and serum biochemical index of fish showed that there is no significant difference. The achieved result demonstrated that DHA fortification dietary groups had significantly lower body weight, hepatocyte diameter, as well as lipid content of muscle and intestine in starved common carp, which may reflect that DHA fortification had no great advantages in fostering common carp endure starvation.关键词
鲤/DHA (Docosahexaenoic acid)/体重/生物学性状/体组成/饥饿Key words
Common carp/DHA (Docosahexaenoic acid)/Body weight/Biological parameters/Body composition/Starvation分类
农业科技引用本文复制引用
周继术,曹艳姿,吉红,于海波..两种油脂水平下DHA强化对饥饿鲤体重及脂代谢的影响[J].水生生物学报,2018,42(4):744-750,7.基金项目
国家自然科学基金(30771667)资助 [Supported by the National Natural Science Fundation of China (30771667)] （30771667）
