期刊
AQUACULTURE RESEARCH
卷 52, 期 6, 页码 2501-2517出版社
WILEY
DOI: 10.1111/are.15100
关键词
growth; inland ground saline water; nutrient utilization; Penaeus vannamei; protein requirement
类别
资金
- Indian Council of Agricultural Research
The study investigated the impact of dietary protein levels on the growth, digestive enzymes, and haemato-biochemical responses of Penaeus vannamei juveniles in inland ground saline water. The results showed that a diet with 400g protein/kg led to the highest growth performance, while higher protein levels resulted in increased proteinase activity and decreased protein efficiency ratio.
A 60-day feeding trial was conducted to evaluate the effect of dietary protein level on growth, digestive enzymes and haemato-biochemical responses of Penaeus vannamei juveniles in inland ground saline water (IGSW) of 15 ppt salinity. The acclimated shrimp (avge. wt., 4.03 +/- 0.05 g) were randomly distributed into seven groups, viz. TCP20, TCP25, TCP30, TCP35, TCP40, TCP45 and TCP50, in triplicate with the stocking density of 15 shrimp per tank (275 L). Seven semi-purified hetero-nitrogenous (200-500 g crude protein/kg), iso-caloric (396 Kcal DE/100 g) and iso-lipidic (60 g/kg) diets were prepared for feeding the shrimp of respective group four times daily on satiation basis. Results indicated that the highest (p < 0.05) WG and SGR, and the lowest FCR were observed in TCP40 group. But PER and ANPU values decreased significantly (p < 0.05) with increasing dietary protein. Whole-body protein and ash contents varied significantly (p < 0.05) with an inverse relationship. Shrimps of TCP40 group had the highest (p < 0.05) haemocyanin and serum total protein, while TCP20 group showed the highest (p < 0.05) serum glucose. Serum cholesterol and triglyceride increased significantly (p < 0.05) with increasing dietary protein level up to 400 g protein/kg and beyond that these decreased gradually. Protease activity increased with increasing dietary protein level, but amylase activity showed an inverse trend. Second-order polynomial regression analysis in relation to WG, SGR and FCR indicated that 393.0-397.90 g protein/kg diet could be optimum for culture of P. vannamei juveniles in IGSW of 15 ppt salinity.
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