The effects of different protein sources on the growth of hybrid tilapia (Oreochromis niloticus x O. aureus) reared under fresh water and brackish water

作者：Fall Jean^*; Yi ThengTseng; Ndong Diegane; Sheen Shin Shyn

来源：African Journal of Agricultural Research, 2011, 6(21): 5024-5029.

• Hybrid tilapia
• Oreochromis niloticus x O. aureus
• nutrition
• fresh water
• brackish water

To evaluate the effects of different protein sources on the growth of hybrid tilapia (Oreochromis niloticus x O. aureus), three growth trials were conducted. In the present study, four approximately isonitrogenous (24% crude protein) and isoenergetic diets were fed to triplicate groups of 9 fish with a mean initial body weight of 1.85 +/- 0.02 g/fish and 2.41 +/- 0.06 g/fish in the brackish water and fresh water, respectively for 6 weeks. In fresh water, the weight gain was higher in the fish fed the control diet containing (FM) and lower in the fish fed diet with squid meal (SQM). There were no significant difference in weight gain for fish fed diet with shrimp meal (SM) and soybean meal (SBM). The fish fed diet containing SM and FM had higher body protein content but lower lipid than the fish fed diet SBM and SQM. In the brackish water, the growth performance of the fish fed the test diets FM and SM was significantly (P < 0.05) higher than that of the fish fed diets containing SBM and SQM. Fish fed SBM showed a significantly (P < 0.05) lower growth and higher mortality than those fed the other treatments. The fish fed diet SM had higher body protein content than those fed the other treatments. There were no differences in body lipid content among treatments. The blood osmolarity of the brackish water fish (340 mOsm/L) was higher than that of the fresh water fish (300 mOsm/L).

• 出版日期2011-10-5