FT Vol.30(1)

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    Phosphatase Producing Microbes Associated with Fish and Shellfish in Trivandrum Coast
    (Society of Fisheries Technologists (India) Cochin, 1993) Eapen, Alex; Maya, K; Dhevendaran, K; Natarajan, P
    Total heterotrophic bacteria and fungi and the phosphatase producing bacteria and fungi in the gill, guts and muscle of fish (ยฃtroplus spp., Gem~s sp. and Glossogobius sp.) and viscera and man.tle of shellfish (Vellorita sp. and Perna sp.) were studied. The hydrographic parameters of the environment from where the fishes were caught were also studied. Except shellfish Perna indica, all the species studk'
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    Length-weight Relationship of the Pond Reared Tiger Prawn, Penaeus monodon Fabricius
    (Society of Fisheries Technologists (India) Cochin, 1993) Mercy, T.V.A; Koya, M.S.Syed Ismail; Vadhyar, K.Jayasree; Thampy, D.M
    Tiger prawn is a fast growing variety reaching large size and is highly ยท ยทpreferred for monoculture and polyculture operations. Eventhough the length-\n'ight relationshipof P. monodon has been studied from the fishery (Subramanyan & Ganapati, 1975), such information from the culture systems is scanty. Knowledge of the length-weight relationship is of great practical utility in computing the weight from length alone and also in assessing the well being of the animals in culture ponds by comparing the values of relative condition factor
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    Studies on the Preparation of Functional Fish Protein Concentrate from Nemipterus japonicus by Enzymatic Method
    (Society of Fisheries Technologists (India)Cochin, 1993) .Setty, T.M.R; Mahesh, T; Shetty, T.S; Ravishankar, C.N
    The study was carried out to develop a suitable method for the preparation of functional fish protein concentrate(FFPC) from theundcrutilized fish, Japanese threadfin bream (Nemipterus japonicus) and to evaluate their functional properties, sensory and chemical characteristics. The FFPCs were prepared employing proteolytic enzymes to partially hydrolyse proteins and then dried in vacuum as well as in a spray drier. The FFPCs obtained by ยท these processes exhibited better functional and sensory properties when oompared to oonventionally prepared fish protein concentrate.
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    A Study on the Piscifauna of Gandhisagar Reservoir with Particular Reference to the Abundance of Commercial Varieties of Fish
    (Society of Fisheries Technologists (India) Cochin, 1993) Kartha, K.N; Rao, K.S
    A study of the pisdfauna of Gandhisagar reservoir, Chambal river, Madhya Pradesh, during 1985-86, has revealed the presence of 41 fish species belonging to 5 orders, 14 families and 28 genera. Commerdally important species were Calla catla, lnbeo ruhitn, Cirrhinus mrigala, followed by lnbeo mlbasu, Aorichthys nor, A. seenglmla, Wallago attu, Ompok bimaculatus and Silonah silondh. Relative dominance of exotic species, Calla aatla and Lnbeo rohita, in the landings contributing nearly 98% (1985-86) has confirmed that these species have successfully established themselve tn the ewsystem of Gandhtsagar. Comparison with the results of preimpoundment surveys has indicated a reduction in the species diversity, with the establishment of reservoir.
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    Drying Characteristics of Salted Fish in a Greenhouse-type Solar Dryer
    (Society of Fisheries Technologists (India) Cochin, 1993) Demir, Sebnem; Evcin, Serdar
    ~ this study, the drying characteristics of salted fish (Merlangius merlangus) were in~ cshgated by the drying experiments carried out in a greenhouse constructed for dehydration and augmented by parabolic reflectors. Drying time of samples was 26 h in the greenhouse and 38 h for samples dried outside to 25% moisture content. It was decided to apply thin layer drying theory in order to explain and compare drying characteristics. Drying constant of that equation was minimum for samples dried in the greenhouse on the conveyor belt augmented by solar reflectors.
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    Seasonal and Spatial Variations in Fishing Intensity and Gearwise Landings of the Vembanad Lake
    (Society of Fisheries Technologists (India) Cochin, 1993) Kurup, B.Madhusoodana; Sankaran, T.M; Rabindranath, P; Sebastian, M.J
    The variations noticed in the fishing intensity on an annual basis in the different regions of the Vembanad lake arc discussed. Stake nets and dip nets acconnted for 72.48% of the total landings; the former contributing to 53.14%. The contributions from gill nets, seines, cast nets, line fishing and other indigenous fishing methods are respectively 10.15, 9.68, 3.49, 2.54 and 1.66%. Stake and dip nets are almost confined to the northern sector (Cochin backwaters), contributing 57 and 20.7% respectively of the production. Seines and gill nets acconnted for 8.5 and 8.3% respectively in this sector. In the southern sector (Thannecrmukkom to Allcppey), the stationary gears are rarely noticed, the major part of the landings being obtained from gill nets (34.34%), seines (24.67%) and cast nets (19.04%).
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    Raw Material Purchase Pattern in Seafood Plants in Kerala
    (Society of Fisheries Technologists (India) Cochin, 1993) Ramachandran, A; Samuel, C.T; Ranganathan, N
    Inadequate and irregular supply of raw materials arc the foremost problems faced by the processing plants in India. A study has been carried out on the purchase pattern of raw materials to aSSt.'SS the situation in the seafood plants of Kcrala, during 1983-84. 50% of the processing plants arc located within one krn from the main landing centre in a region. 82% of the plants have their own transportatlon facilities. 64% of the plants in Cochin region took 4 to 6 h for bringing the raw materials to the plants after purchase. This was between 6 and 8 h in Kollam region. In all the plants, the main item of purchase was confined to shrimps. The raw material purchases in all the plants were far below the installed capacity. In 39o/o of the working days, the plants selected for the study had no purchase or production during the study period.
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    Further Observations on the Comparative Efficacy of Some Indigenous Methods for the Protection of Underwater Timber Structures
    (Society of Fisheries Technologists (India) Cochin, 1993) Rao, M.V; Cherian, C.J; Cheriyan, P.V
    Results of long-term evaluation of several indigenous methods for protection of underwater timbers against wood boring organisms are reported in this paper. While unprotected control poles were totally destroyed due to severe infestation by the wood borers within a period of 9 months, the poles covered with coppcr-crome-arscnic (CCA)/ creosote fuel oil (CFA) treated coir rope lasted for 5 years, the ones studded with iron nails gave a life of 16 years and those plastered with cement over CCA treated coir rope winding/ scattered nailing interconnected with winding wire were in sound condition even afterwards. Specific advantages offered by the methods in curtailing marine borer attack arc also mentioned.