Larvae of freshwater sweet fish 'ayu ' Plecoglossus altivelis were raised on artificial diets containing soluble whole egg as single source of protein supplemented with taurine, ursodes-oxychloric acid, gluta-thione, tachinase and pancreatin. The growth and survival rate of larvae reared with artificial diets were compared with those reared on rotifer. The larvae fed on artificial diets supplemented with 0.5 % ursodes-oxycholic acid had highest growth and survival rate compared with those groups either without supplement or supplement with taurine, glutathione, tachinase or pancreatin. However, the larvae fed on rotifer showed far better growth and survival rate compared to those raised on artificial diets.

A research study was conducted to investigate the culture possibility of fresh water catfish Pangasius pangasius with formulated feed in natural ponds. The stocking density was chosen as 8000 fry/ha with an initial weight of 42.57+ 2.51 g. The formulated feed contained 45 % fishmeal, 30 % mustard oil cake, 15 % wheat bran and 10 % rice bran to supply 40.48 % protein in feed. The growth of Pangasius pangasius in terms of net weight gain was found as 266.49g, which was statistically significant (p<0.05). The food conversion ratio (FCR) observed during this research study was high (7.58). There was no variation in the biochemical composition of the fish as a result of such culture technique and experimental conditions. The whole experiment was conducted for a period of 10 months. Production of fish was found to be 2.13 tones/ha using this formulated feed.