FT Vol.36(1)
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- ItemRole of Collagen in Gaping of Fish Fillets(Society of Fisheries Technologists (India)Cochin, 1999)The extent of gaping in the skinless fillets of Sardinella longiceps, Rastrelliger kanagurta, Oreochromis mossambicus, Cyprinus carpio, Euthinnus affinis and Scoliodon sorrkozvah during frozen storage and its relationship with the collagen content of the muscle were studied. Gaping was not significant in any of the fillets during the first three months of frozen storage, irrespective of the collagen content. Significant gaping occurred in fish stored for longer period. The degree of gaping was more in those fish which had low collagen content. Removal of skin appeared to be helpful in preventing gaping.
- ItemKinetics of Desorption of Water and Absorption of Salt During Blanching of Prawn(Society of Fisheries Technologists (India)Cochin, 1999)During blanching prawn desorbs water, absorbs sodium chloride from the surrounding blanching solution and undergoes denaturation. The rate of desorption from the muscle tissue was directly proportional to time, temperature and concentration of NaCl in blanching brine and the kinetics of desorption followed the first order reaction. Variation in the concentration of NaCl in the blanching liquor did not alter the mechanism of desorption. The bonding reaction involving ions was disfavoured at high temperature so that the rate constant became independent of ionic strength
- ItemEffect of Varying Levels of Dietary Protein on the Growth and Body Composition of the Grey Mullet Liza macrolepis Fingerlings(Society of Fisheries Technologists (India)Cochin, 1999)Casein-gelatin based isocaloric purified diets with graded levels of protein (10-60%) were fed to the fingerlings of Liza macrolepis for 60 days to evaluate the growth, feed conversion and carcass composition. Relative growth, specific growth, normalized biomass index and survival rate were higher and feed conversion ratio, lower in fish which received 40% dietary protein. Carcass composition of the fish indicated that protein, lipid, carbohydrate and moisture were significantly different while ash content was not significantly different from the initial values. The studies showed that dietary protein at a level of 40% was optimal for the species.
- ItemEffect of Hydrogen Sulphide on Benthic Fauna of a tropical Estuary(Society of Fisheries Technologists (India)Cochin, 1999)The distribution and abundance of some benthic organisms in the Kayamkulam estuary (a tropical estuary), revealed that polychaetes, tanaids, amphipods, isopods, bivalves, gastropods and nematods were the major groups of macrobenthic animals. Among these, polychaetes were the most abundant group in unpolluted area compared to hydrogen sulphide-polluted area. In the polluted area polychaetes and nematods were observed during the study period
- ItemEffect of Graded Levels of G-probiotic on Growth, Survival and Feed Conversion of Tilapia, Oreochromis mossambicus(Society of Fisheries Technologists (India)Cochin, 1999)The effect of G-probiotic on growth, survival and feed conversion in Oreochromis mossambicus was studied. Three diets formulated by incorporating the growth promoter, Gprobiotic at 5.0, 7.5 and 10.0 g/kg diet respectively were evaluated. The crude protein content was 30% in each diet. The diets were fed to triplicate groups of tilapia fry twice daily at a level of 10% of their biomass for 90 days. Water quality parameters recorded during the experimental period were within the range suitable for tilapia growth. The results showed better specific growth rate, food conversion rate and protein efficiency ratio in the group which was given 7.5 g G-probiotic/kg diet