FT Vol.37(1)
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- ItemWater-Stability of Pelleted Fish Feeds Prepared from Non-Conventional Sources(Society of Fisheries Technologists (India)Cochin, 2000)Fish feed was formulated using easily available low cost material as protein source and the water stability of the formulated feed was tested. It was found that feeds with higher fat content had better stability in water
- ItemSodium Acetate and Vacuum Packaging to Improve Shelf Life of Refrigerated Lethrinus lentjan Fillets(Society of Fisheries Technologists (India)Cochin, 2000)The shelf life of vncuum packed fresh Lethrinus lentjan fillets, untreated or treated with various levels of sodium acetate, was evaluated. The quality was assessed periodically by selected biochemical, microbiological and sensory characteristics. The shelf life of product packed without vacuum and untreated vacuum-packed fillets was around 7-8 days whereas sodium acetate treated fillets had shelf life of 2-3 weeks. Reduced rate of bacterial growth, decreased rate of production of TMA-N and TVB-N and delayed development of off odours were observed in sodium acetate treated, vacuum packed fillets
- ItemInter-relationship Between Condition Coefficient (K) of Penaeus monodon and Heavy Metals from a Brackish Water Pond(Society of Fisheries Technologists (India)Cochin, 2000)The condition coefficient (K) of Penaeus monodon, collected from a traditional brackish water system at Kanmari, about 50 km away from the city of Calcutta, during the period from March 1992 to February 1994, was estimated. During the investigation period, concentrations of heavy metals (Zn, Cu, Mn, Fe, Cr, Ni, Pb and Cd) in the ambient media (sediment and water) were determined to study the suitability of the environment for the growth and survival of the species. There was a negative correlation between the condition coefficient and the concentration of heavy metals in water.
- ItemEffect of Petroleum Hydrocarbon on Physiological and Biochemical Parameters in an Estuarine Clam, Paphia malabarica(Society of Fisheries Technologists (India)Cochin, 2000)Commercial grade diesel oil was used as a source of petroleum hydrocarbon to study the toxic effect of petroleum hydrocarbons on physiological and biochemical parameters in an estuarine bivalve, Pnpliin malabarica. The results of the investigation revealed the adverse effect of diesel oil on the growth condition index and biochemical constituents. The growth was affected resulting in reduction of about 30% in the average growth rate after 30 davs. The impact was more with higher concentration. There was reduction in the values of organic carbon and nitrogen. The biochemical constituents such as protein and carbohydrate also showed slight decline while the lipid content increased marginally. The results suggest that exposure to petroleum hydrocarbon may be deleterious to manv marine and estuarine organisms and may change the physiological and biochemical processes, depending on its bioavailability and exposure concentration.
- ItemDestruction of Surface-Inoculated Escherichia coli, Vibrio cholerae and Salmonella typhi in Rohu (Labeo rohita) Steaks during Microwave Cooking(Society of Fisheries Technologists (India)Cochin, 2000)The destruction of bacteria during microwave cooking of fish was studied. Fish steaks were surface-inoculated with Esclierichia coli, Vibrio cholerae and Salmonella typhi and cooked in a microwave oven. The bacteria were enumerated by plating on selective and non selective media and by MPN technique. The vegetative cells of S. typhi and V. cholerae were totally destroyed from an initial count of 107 cfu/g to a non detectable level and E. coli was destroyed from an initial count of 107 cfu/g to 1 cfu/lOg after microwave treatment. Cooking for a longer duration at low power output level was found to ensure the killing of pathogens and minimize bumping without any distortion of shape.