1991

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    Effect of Ascorbic Acid Dip Treatment on Frozen Storage of Squid (Loligo duzzaucelii, Orbigny)
    (Society of Fisheries Technologists (India) Cochin, 1991) Selvaraj, P; Jasmine, G.Indira; ]eyachandran, P
    Squid (Loligo duvaucelii) was treated with 0.5% ascorbic acid solution for 10 min and both treated and control samples were frozen at -40°C and stored at -20°C The quality changts during frozen storage and shelf life were evaluated by following the physical, chemical, bacteriological and sensory characteristics. Ascorbic acid treatment was found to improve the quality and shelf life compared to control.
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    Combined Effect of Environmental Factors on Spoilage Bacteria
    (Society of Fisheries Technologists (India) Cochin, 1991) Chandrasekharan, M; Lakshmanaperumalsamy, P; Chandramohan’, D
    Effect of environmental factors such as temperature,pH and sodium chloride concentrations, individually and at various combinations, on the growth and survival of spoilage bacteria was studied in flesh broth and Zobells broth. Eight isolates, belonging to three different genera namely, Pseudomonas, Vibrio and Acinetobacter, harvested from spoiled Penaeus indicus were stored at 5,15,30,35 and 50°C, pH 2,4,6,8,10 and 12 and sodium chloride concentrations of 0,1,3,6,10 and 15%. Optimum growth for all the isolates was found to vary from 15 to 45°C and pH from 5-10. The growth pattern of all the isolates, in rcsponse to various sodium chloride concentrations was not similar in flesh broth and Zobells broth. Optimum sodium chloride concentration was found to vary from 1 to 6%. Influence of more than one environmental factor on the growth of spoilage bacteria was tested at various levels in flesh media by maintaining one of the factors constant and altering the other two. Results suggested that at extreme conditions each individual factor had an independent influence on the growth of bacteria.
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    Methods for Comparison of Potentialities of Fishing Grounds and Efficiencies of Gears
    (Society of Fisheries Technologists (India)Cochin, 1991) Rao, K. Venkateswara
    The potentialities of fishing grounds were studied using the non-parametric methods; Wilcoxon test, Sign test, Run test and Median test and the two fishing grounds tested were found equipotential. Gear efficiency was also studied by non-parametric methods.
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    Processing of Oyster Meat for Freezing
    (Society of Fisheries Technologists (India) Cochin, 1991) Chellappan, N.]ohn
    Experiments were conducted to determine the idealdepuration time for oysters and processing for shucking. A depuration time of 24 h reduced substantially the sand content. Steaming of oysters for shucking yielded better quality meat with good appearance than the hot water dipping method.
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    Comparative Study of the Major Nutrients of Macrobrachium idella (Hilgendorf, 1898)
    (Society of Fisheries Technologists (India) Cochin, 1991) Joseph, N.I; Jayachandran, K.V
    Proximate analysis has great importance for assessing the nutritive value of food organisms. Such data on many aquatic products are not available. The proximate composition of palaemonid prawns have not been determined. The present paper is a comparative study of the proximate compostion of Macrobrachium idella (Hilgendorf, 1898) from three biotops.
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    Observations on Experimental Two-boat Bottom and Midwater Trawling in Gandhisagar Reservoir
    (Society of Fisheries Technologists (India) Cochin, 1991) KARTHA, K. N; RAO, K. S
    Amongthe two trawl designsemployed for two-boat bottom trawling l2.50m dual purpose trawl caught 33.22% more fish than l2.50m large mesh high opening trawl. The increase in the average catch/h of fish is 60.53% in dual purpose trawl due to attachment of false head rope. The influence of trawling speed of 2-4 knots, on the specieswise catch composition of fish obtained during experimental two~boat bottom and midwater trawling is discussed
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    Relative Condition Factor in Nandus nandus (Hamilton)
    (Society of Fisheries Technologists (India) Cochin, 1991) John, K.C; Nair, N. Balakrishnan
    The relative condition factor (Kn) was calculated for males and females of Nandus nandus (Hamilton). In males the relative condition factor is above 0.7 in all months and showed two peaks, in August and in October whereas in females it is more or less steady with three median peaks - May, July and September. The results show that there is positive correlation between relative condition factor and reproductive cycle of this fish.
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    Drying of Anchovies (Stolephorus indicus) in a Solar Polythene Tent
    (Society of Fisheries Technologists (India) Cochin, 1991) Reddy, K. Punna; Sudhakara, N.S; Setty, T.M. Rudra; Rao, V. Surya Prakash
    The drying parameters of anchovies dried in solar tent dryer and under sun are compared. Though the temperature inside the tent was 14-15°C higher than the ambient temperature during early aftemoonin sunny days the drying rate did not show any significant difference between the two methods. Hence solar tent dryer offered little merit but for the protection given by tent against dust, insects, birds or sudden shower.
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    Effect of Tidal and Lunar Phases on the Penaeid Prawn Seed Abundance
    (Society of Fisheries Technologists (India) Cochin, 1991) GUNAGA, VISHNUDAS; NEELAKANTAN, KUSUMA; NEELAKANTAN, B
    In the present work, to study tidal and lunar influences on penaeid prawn seed abundance, collections of water and seed samples were made on 21 August, 1986 (full moon), 5 September, 1986 (New Moon) and 12 September, 1986 (half moon) in the Kali estuary, Karwar where tides are of sem i-diurnal type. In each lunar phase, collections were made every three hour intervals commencing from 06.00 to 18.00 h covering four tidal phases: high, receding, low and rising tides.
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    Determination of Optimal Spice Combinations for Sardinella albella Fish sauce
    (Society of Fisheries Technologists (India) Cochin, 1991) VELAYUDHAN, P; JEGATHEESHAN, G; SANTHANAM, R
    Conversion of trash fish protein into readily consumable product with long shelf life, adopting less tedious and low cost technology, would go a long way to augument the national economy. In this context, marine food formed by slow fermentation process deserves scientific and economic concern. Fish sauce is a fermented product obtained from the slowdigestion of a mixture of fish and salt in the ratio 3:1 resulting in a clear liquid with a characteristic fermented flavour.
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    Seed Production of Macrobrachium rosenbergii in Backyard Hatcheries - An Economic Analysis
    (Society of Fisheries Technologists (India)Cochin, 1991) RAJU, M. S; NAIR, C. MOHANAKUMARAN
    A study on the economic aspects of seed production of the giant freshwater prawn, Macrobrachium rosénbergii (de Man) is conducted. The data were collected from two hatcheries around Kochi. The technology adopted is feasible and cost-efficient. The cost of production of 1000 seeds is found as Rs. 15.86. But the cost of production of 1000 seeds from the wild is reported to be Rs. 250.00 to Rs. 300.00. This study reveals that the operation provides profit @90.33% on the capital investment. The managerial aspects of me hatchery is also discussed.