FT Vol.45(1)
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- ItemAwareness and Utilization of Computers by Shrimp Farmers(Society of Fisheries Technologists (India)Cochin, 2008)A study was conducted in Thiruvallur and Thoothukudi districts of Tamil Nadu to assess the shrimp farmers awareness and utilization of computers, and their constraints. The major sources of awareness utilized by the farmers are personal localite channels like fellow farmers and friends (42 percent) and mass media channels (34 percent) followed by, extension agency contact (18 percent), and internet (8 percent). Regression analyses on the awareness scores among the respondents revealed that the eight independent variables explained 71 percent of the variance in the farmers' awareness on use of computers. Further the results also revealed that four variables viz., age, farming experience, farm size, and mass media exposure would have to be strengthened to increase the awareness on the utility of computers in shrimp farms. 78 percent of the respondents used computers for non-aquacultural activities followed by 4 percent of them who had exposure to programming and database design, and 22 percent of the respondents had exposure to e-mail services. Lack of technical knowledge and technical support were the main constraints found in the awareness and utilization of computers by shrimp farmers.
- ItemIdentification of Polymorphic Allozyme Markers for Assessing Genetic Variability in Golden Mahseer, Tor putitora(Society of Fisheries Technologists (India)Cochin, 2008)Screening of thirty-two allozyme loci in Tor putitora yielded ten polymorphic loci, useful in determining genetic divergence in natural populations of the species. Samples from three different Indian rivers viz. the Satluj, Ganga and Garua were studied with the identified allozyme loci, to assess their suitability for genetic diversity analysis in T. putitora. The observed heterozygosity per locus varied from 0.0840 (Satluj) to 0.1245 (Ganga). The significant genotype heterogeneity was observed between the sample sets (P<0.05). The identified loci exhibited significant potential to determine population structure of T. putitora across its natural range of distribution.
- ItemVirulence Factors Associated with Staphylococcus Spp. Isolated from Fish and Fishery Products(Society of Fisheries Technologists (India)Cochin ., 2008)Forty-eight isolates of Staphylococcus obtained from fish and fishery products [Staphylococcus aureus (25), Staphylococcus hysicus subsp. chromogens (7), Staphylococcus simulans (7), Staphylococcus epidermidis (7) and Staphylococcus warneri (2)] were used to study the virulence factors associated with these organisms. The virulence factors studied were lipase, phospolipase, phosphatase, thermo nuclease, enterotoxins and haemolysins. Lipase, phospholipase, and urease were produced by all the strains, where as thermo nuclease was produced by S.aureus strains only. In the case of other factors like haemolysins, proteases, phosphatases and enterotoxins, considerable strain-to-strain variation was observed. Most of the isolates produced more than one virulent factor. Enterotoxins were produced by 76% of S.aureus isolates. None of the coagulase negative staphylococci could produce enterotoxins. The study also shows that most of the isolates are capable of producing potential virulent enzymes and enterotoxins, which can cause infection and intoxication
- ItemEffect of fish protein on isoprenaline - induced alterations in lipid and antioxidant status in adipose tissue of rats(Society of Fisheries Technologists (India), Cochin, 2008)The present study was designed to examine the protective effect of 20% fish protein in adipose tissue of isoprenaline-treated male albino rats. The protective effect was determined based on the following criteria: total body and adipose tissue weight, protein concentration in adipose tissue, total lipid in adipose tissue, concentrations of total cholesterol, triglycerides, free fatty acids and phospholipids of serum and adipose tissue and anti-peroxidative enzymes in adipose tissue. Fish protein feeding brought about a significant decrease in the total body weight and adipose tissue weight and in levels of adipose tissue total lipid, cholesterol, triglycerides and free fatty acids. Fish protein fed rats showed significant rise in adipose tissue protein content. It also prevented a rise in antiperoxidative enzymes catalase and superoxide dismutase and elevated the levels of reduced glutathione which indicates that fish protein protects against lipid peroxidation. Fish protein feeding has also led to lowering of serum cholesterol, triglycerides and free fatty acids and increased the proportion of HDL cholesterol. The protective effect of fish protein is believed to be due to its unique amino acids content namely, the reduced methionine: glycine and lysine: arginine ratios and increased sulphur containing amino acids.
- ItemFrozen storage studies of mince based products developed from tilapia (oreochromis mossambicus, peters 1852)(Society of Fisheries Technologists(India),Cochin, 2008)Tilapia (Oreochromis mossambicus) is a relatively abundant, low value fish that has wide distribution in India due to its adaptability to different environments. In India, the fish has limited scope for consumption in the fresh form. This study is an attempt to explore the possibilities of better utilization of this species by development of mince-based value added products and the evaluation of shelf life during frozen storage. Mince from Tilapia was used for the preparation of value added products viz., chilly fish, fish cutlet and fish balls. The biochemical and sensory parameters were analysed to study the quality changes and shelf life of these products in frozen storage at - 20 C. The products had a good shelf life of 18 to 21 weeks in frozen storage.