Abstract:

The effectiveness of phospholipids (PL) addition to formulated diets for rohu, mrigal and catla larvae was investigated. The test diets in the first two experiments were supplemented with 0, 2 and 4% of a purified phospholipids and 6, 4 and 2% of vegetable oil and cod liver oil mixture, while, in the third experiment, two more levels of purified PL were incorporated, i.e. 0, 2, 4, 5 or 6% of purified PL and 6, 4, 2, or 1% of vegetable oil and cod liver oil (1:1). All the diets were isolipidic and had similar protein and energy levels. Growth and survival was significantly higher in the 4% PL group in rohu larvae, in the 2 and 4% PL groups in mrigal larvae and in the 4, 5 and 6% PL groups in catla larvae. The lipid and PL content of five-day-old rohu were 16.5% and 42.30%, those in mrigal were 19.40% and 31.80%, and in catla, 16.80% and 43.00% respectively. Both lipid and phospholipids levels were lower in the final tissue sample of Indian major carp larvae with incorporated graded levels of PL in the diet. Results suggest that the inclusion of dietary phospholipid at 4% in the larval diet is necessary for rapid growth and high survivability of Indian major carps.

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Date 1998/12/01

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