Growth and Lipid Metabolism of the Pacific White ShrimpLitopenaeus vannameiat Different Salinities

• DOI: 10.2983/035.033.0317
• Publication Date: 2014-12-04T11:59:07Z
• Authors: Ke Chen; Erchao Li; Lei Gan; Xiaodan Wang; Chang Xu; Heizhao Lin; Jian G. Qin; Liqiao Chen
• Keywords: Litopenaeus; Linolenic acid

Juvenile white shrimp Litopenaeus vannamei (1.98 ± 0.28 g) were fed a commercial diet for 8 wk in triplicate to investigate growth and lipid metabolism at 3 salinities (3, 17, 30). Shrimp weight gain survival significantly less than that 17 30. No differences found whole-body proximate composition. Linolenic acid (18:3[n-3]) (n-3) long-chain unsaturated fatty levels the hepatopancreas, n-3 polyunsaturated level, especially eicosapentaenoic (EPA; C20:5[n-3]) docosahexaenoic (DHA; C22:6[n-3]) muscle greater other salinities. Fatty synthase, hormone sensitive lipase, lipoprotein adipose triacylglycerol acyl-CoA, diacylglycerol acyltransferase 2, elongase of very 6, Δ5 Δ6 desaturase activity was detected showed negative trend with an increase salinity, no significant among salinity groups (P > 0.05). The results indicate low decreases L. vannamei. Although could not synthesize either DHA or EPA de novo, it possibly has potential ability convert linolenic regardless salinity. However, factors influencing this remain unknown need further study.