Enriched conventional feed for Indian major carps
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The conventional fish feed comprising a 1:1 mixture of groundnut oil cake and rice bran by weight was enriched by incorporation of an aquatic weed, (Salvinia sp.) powder, bloodmeal and sugar wastes and two test diets were prepared with a protein level of 28 – 29%. Diet a comprised bloodmeal, rice bran and groundnut oil cake (1:3:6) while diet B. groundnut oil cake. Salvinia powder and sugar wastes (8:1:1). All the experimental diets were fortified with vitamins and minerals. The two diets were tested against the conventional feed mixture in a laboratory trial-run of 60 days on fry (0.49 g average weight) of Labeo rohita (Ham..). The significant growth performance ( p 0.01) was observed in the feed with bloodmeal (0.8 g average live weight gain at a specific growth rate of 1.75% of body weight/day) as compared to the other two diets (0.45 g average live weight gain at a specific growth rate of 0.97% of body weight/day for the diet incorporating aquatic weed, salvinia sp. and sugar was tes (diet B) and 0.44 g average live weight gain at a specific growth rate of 1.08% of body weight/day for the conventional feed mixture).