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| Effects of Different Diets on Growth, Development and Digestive Enzymes Activity in Tilapia Hybrid Larvae |
| QIANG Jun,WANG Hui,LI Rui-wei,DONG Xiao-hui |
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Abstract The larval hybrid tilapia (Oreochromis niloticus×O. aureus)with initial body weight of (0.006±0.0005) g was fed either artificial diet, rotifers, eggs or rotifers and artificial diet for 28 days with triplication to elucidate the effects of food items on growth, development and activities of the digestive enzymes. The larval tilapia had the best growth (absolute growth rate of 0.150/d and 0.142 g/d and specific growth rate of 0.014%/d and 0.013%/d (P<0.05) when fed rotifers and artificial and artificial diet while the larvae fed the eggs had the worst growth (P<0.05). There were survival of 90.3% and 89.7% in the developed well larvae fed rotifers and artificial or rotifers. The slow developmental larval tilapia fed the eggs had the lowest survival (40.7%). On the activity of the digestive enzymes, different diets had significant effect on activity of the digestive enzymes in the hybrid tilapia larvae (P<0.05). There were the maximal activities of amylase and lipase in the larvae fed the eggs and the maximal activity of pepsin was observed in the larvae fed the rotifers and artificial diets. The minimal activity of pepsin, however, occurred in the larvae fed the eggs.
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Received: 25 November 2009
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