FT Vol.34(1)
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- ItemPickled Product from a Gastropod, Babylonia spirata(Society of Fisheries Technologists (India)Cochin, 1997)The gastropod. Babylonia spirata meat was softened by cooking under pressure and pickle was prepared using standard recipe and methodology. The shelf life was assessed by chemical, microbial and organoleptic characters during the storage period of 150 days. The pickle did not show any specific signs of spoilage.
- ItemDiet of Parapenaeopsis stylifera (H. Milne Edwards) from Mangalore Region(Society of Fisheries Technologists (India)Cochin, 1997)Parapenaeopsis stylifera, an important penaeid shrimp caught along Mangalore coast was taken for the study of its diet. The stomach contents of 3197 specimens, of which 68.75%, females and 31.25% males, were analysed. The analysis of gut contents indicated P. stylifera to be an omnivorous bottom feeder. The stomach contents mainly consisted of crustaceans, mud and detritus, vegetable matter, gastropods, bivalves, diatoms and sand particles. P. stylifera was also found to feed on polychaetes. Juvenile shrimp fed more on diatoms and vegetable matter while adult fed mainly on crustaceans, mud and detritus. Higher feeding intensity occurred with sexual maturity of shrimp
- ItemOn the Intensity of Exploitation of Berried Females of Macrobrachium rosenbergii (de Man) in the Vembanad Lake(Society of Fisheries Technologists (India)Cochin, 1997)The annual exploited stock of Macrobrachium rosenbergii during 1994-95 from Vembanad lake is computed at 112.35 tons of which 66.22 tons was constituted by the female population. Contribution of berried and spent females were in the order of 23.43 tons and 5.02 tons respectively. Highest exploitation of berried (13.24 tons) and spent (3.39 tons) females were noticed in October while zone 11 accounted for maximum landings of berried prawns (3.6 tons). More than 50% of the berried females were found to be exploited from upstream part of the lake during September and October. In zone 4, 49.59% of the total spawner was comprised of spent females in the month of October. Among the various type of fishing gears and methods, "Pongu Veechal" accounted for exploitation of 75 and 79% of berried and spent females respectively. Temporal and spatial variations in the intensity of exploitation of ovigerous females and spent females are given. Intensity of recruitment over fishing being exercised on the stock of M. rosenbergii of Vembanad lake is brought out and the methods by which conservation measures can easily be imposed for replenishment of stock is also highlighted.
- ItemCitric Acid as a Feed stimulant(Society of Fisheries Technologists (India)Cochin, 1997)Utility of citric acid as a feed stimulant for fry of Ctenopharyngodon idella was tested. The fry ate more feed containing dry aquatic macrophyte when citric acid was added. Food consumption, feed conversion efficiency and specific growth rate were higher at 0.01 M citric acid concentration.
- ItemUse of Phaseolus trilobatus as Protein Source in the Diet of Labeo rohita Fingerlings(Society of Fisheries Technologists (India)Cochin, 1997)In the present study groundnut cake was partially replaced with whole seeds of Phaseolus trilobatus at 20%, 40% or 60% levels and the pelleted feeds were fed to the fingerlings of Labeo rohita. The growth performance of the test groups was compared with the control group fed on groundnut cake based pelleted feed over a period of six months. Though all the test groups exhibited significant increase in growth parameters compared to control group, the best growth parameters compared to control group, was observed at 20% inclusion level.