Effects of dietary lipid levels on growth performance, whole body composition and fatty acid composition of juvenile gibel carp (Carassius auratus gibelio). (9th September 2014)

• Record Type: Journal Article
• Authors: Wang, Aimin; Yang, Wenping; Shen, Yonglong; Han, Guangming; Lv, Fu; Yu, Yebing; Huang, Jintian; Zhang, Jiahong
• Is Part Of: Aquaculture research. Volume 46:Number 11(2015)
• Page Start: 2819
• Page End: 2828
• Publication Date: 2014-09-09
• Subjects: Aquaculture -- Periodicals; Fishery management -- Periodicals; 639.8
• DOI: 10.1111/are.12571
• Languages: English
• ISSNs: 1355-557X

Abstract

<abstract abstract-type="main" id="are12571-abs-0001"> <title>Abstract</title> <p>We evaluated the effects of dietary lipid levels on the growth, whole body composition and fatty acid composition of juvenile gibel carp (<italic>Carassius auratus gibelio</italic>). Triplicate groups of 120 juvenile <italic>Carassius auratus gibelio</italic> (average weight: 2.05 g) were fed four isonitrogenic diets formulated with lipid levels of 1.4% (low), 6.1% (control), 11.6% (medium) and 21.1% (high) for 60 days. Weight gain in the 11.6% lipid group was significantly higher than that in the other groups (<italic>P < </italic>0.05). The feed conversion ratio decreased and protein efficiency ratio increased (<italic>P > </italic>0.05) as dietary lipid levels increased. N‐3 polyunsaturated fatty acids (PUFA) were not detected in faeces. The whole body lipid contents of 11.6% and 21.1% lipid level groups were significantly higher than that of the 1.4% and 6.1% lipid level groups (<italic>P < </italic>0.05). The content of whole body n‐3 PUFA in the 21.1% lipid level group enhanced significantly (<italic>P < </italic>0.05). The whole body contents of eicosapntemacnioc acid (EPA) and docosahexaenoic acid (DHA) in the 21.1% lipid level group were the highest (<italic>P < </italic>0.05). These results indicated that high dietary lipid levels (21.1%) inhibit weight gain and promoted fat and n‐3 PUFA deposition in juvenile <italic>Carassius auratus gibelio</italic>, which led to liver damage. A dietary lipid level of 11.6% was determined to be optimal for growth performance of juvenile <italic>Carassius auratus gibelio</italic>.</p> </abstract>