1 JULY 1999
DIETARY ESSENTIALITY OF PHOSPHOLIPIDS IN INDIAN MAJOR CARP LARVAE
B.N. Paul, S. Nandi, S. Sarkar, P.K. Mukhopadhyay-1998
Asian Fisheries Science, 11 : 253-259
Abstract :
The effectiveness of phospholipid (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 phospholipid 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, 1 or 0% 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 group 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 phospholipid 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.
(Central Institute of Freshwater Aquaculture, Kausalyaganga, Bhubaneswar-751002, India)