Effects of Varying Dietary Lipid Levels on Growth Performance and Body Composition of Nile Tilapia
Keywords:
Oreochromis niloticus, lipids, growth performance, feed utilization, energy efficiency, dietary, fat content, moisture contentAbstract
A study on growth and body composition of Nile tilapia (Oreochromis niloticus L.) indicates that mean weight, Mean Weight Gain (MWG), Specific Growth Rate (SGR) and Feed Conversion Ratio (FCR) are not affected significantly (p>0.05) by varying dietary lipid levels. However, fat content levels appear to increase significantly in the viscera of fish fed on higher levels (6% lipid diet) at 8.03±2.03% of total body weight (p<0.05). This may be an indication that diets with high lipid levels may contribute to elevated fat deposits in viscera and may contribute to obesity in fish. There were no significant differences among diets in fat contents of the fillets. Dietary lipid levels had no effect on moisture content of both fillets and viscera (p>0.05). Survival of fish fed on 3% lipid diet was significantly high (p<0.05) compared to the other two diets; suggesting some adverse effects may be associated with dietary lipid levels.
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