FT Vol.42(1)

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    Biochemical and Microbiological Characteristics of Salt fermented Hilsa (Tenualosa ilisha)
    (Society of Fisheries Technologists (India)Cochin, 2005) Majumdar, Ranendra Kumar; Basu, Subrata; Anandan, R
    Lona ilish, is a salt fermented product from hilsa, is very popular in Bangladesh and Northeast part of India due to its typical flavour and aroma. Biochemical composition including amino acid profile of both raw hilsa fish and Lona ilish has been studied. A significant variation was observed in the amino acid profile of the product as compared to that of raw fish. The bacterial flora of the fermented product comprised of Micrococcus and Bacillus species
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    Biochemical and Microbiological Quality of Frozen Fishes Available in Tuticorin Super Markets
    (Society of Fisheries Technologists (India)Cochin, 2005) Elizabeth, K. Mary; Patterson, Jamila; Gnanambal
    The present study clearly shows that the frozen fishes sold in the super markets of Tuticorin are not spoiled, but are contaminated with pathogens and the pathogens have developed a strong resistance to 4 of the strong antibiotics. Proper sanitary care will reduce the contamination and so care should be taken during processing and preservation to ensure the safety of the consumers.
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    Characterisation of the Bacterial Flora Associated with the Biofilter in Fresh Water Home Aquarium
    (Society of Fisheries Technologists (India)Cochin, 2005) Sreenath, M.L; Rahiman, K.M. Mujeeb; Hatha, A.A. Mohamed
    The role of filter bed soil bacterial flora on maintenance and improvement of environmental parameters of the fresh water home aquarium has been analysed. The study was carried out as a preliminary step to develop a microbial consortium for use in the biofilters of freshwater home aquaria. The results showed considerable improvement in the water quality, particularly significant improvement in the dissolved oxygen content. There was two log increase in the total heterotrophic bacterial (THB) load of the filter bed soil and the characterisation of the microflora showed selection of gram positive microorganisms, especially of the genera Bacillus towards the end of the experimental period
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    Effect of Body Weight on Reproduction and Mobilization of Organic Reserves in Female Sailfin Molly Mollienesia latipinna (Le Sueur)
    (Society of Fisheries Technologists (India)Cochin, 2005) James, R; Sampath, K; Karoline, A. Rose Malar
    Reproduction and mobilization of nutrients and energy for reproduction were studied in female Mollienesia latipinna as a function of body weight. Total reproduction (TR), reproductive effort (RE) and somatic condition factor (SCF) increased with increase in body weight. Gonad was not developed in the smallest female tested (0.313 g) and gonad weight was highest before parturition (breeding) and it significantly declined after varied parturition. The proximate composition and energy in somatic and gonad tissues varied with increase in body weight of female M. latipinna and if suggests the deposition of nutrients with the advent of the reproductive period. Low level of lipid in soma and high level of lipid in female gonads indicate the mobilization of lipid from soma to gonad to provide nutrients for the development of eggs and fry. Nutrients and energy were more in soma and gonad before parturition and they significantly reduced after parturition. M. latipinna being an ovoviviparous fish, utilized significant amount of nutrients and energy for the development of ova, egg and fry which led to the reduction of energy contents after parturition
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    Effect of Coated Vitamin C on the Growth of Macrobrachium rosenbergii (de Man) Juveniles
    (Society of Fisheries Technologists (India)Cochin, 2005) Ittoop, Gijo; Sebastian, M.J.; Nair, CM
    Experiment was conducted to study the effect of dietary vitamin C on growth and food conversion ratio of Macrobrachium rosenbergii juveniles, to determine the optimum dietary requirement of Vitamin C and to characterize the deficiency syndromes, if any. CVC F-90, a hydrogenated vegetable oil coated form of vitamin C, with 90% available ascorbic acid was used as the vitamin source. Growth and food conversion ratio were found to have significantly improved by incorporating dietary vitamin C. Deficiency syndromes like incomplete moulting and black lesions at the tip of walking legs were noticed below a level of 75 mg CVC F-90 / kg of dry diet. The maximum weight gain of 194.92% was obtained with a dietary level of 150 mg CVC F-90 / kg dry diet. Non-linear regression estimate based on percentage weight gain showed the optimum requirement to be 200.3 mg CVC F-90 / kg dry diet that is equivalent to 182.97 mg Ascorbic Acid Equivalent/kg dry diet.
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    Effect of Isocaloric Diets with Varying Protein Level on Growth and Survival of Post-larvae of Macrobrachiutn rosenbergii
    (Society of Fisheries Technologists (India)Cochin, 2005) Kharatmol, B.R; Tripathi, S.D
    Post-larvae of Macrobrachiutn rosenbergii (de man) were fed on an isocaloric diet (3100 K.cal DE/Kg) having different levels of protein (27.56, 34.12 and 41.12%) with protein: energy ratio of 88.16, 109.18 and 130.58 mg CP/K. cal respectively. The animals were reared for a period of six weeks under a temperature regime of 13-220C. The highest weight gain, specific growth rate and the best feed conversion ratio recorded were 165.61 mg, 3.35 and 1.69 respectively. The survival rates in ranged between 77.8 and 84%.
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    Effect of rotation on the heat penetration of thermally processed tuna (thunnus albacares) in oil in aluminium cans
    (Society of Fisheries Technologists(India),Cochin, 2005) Ali, A.A.; Sudhir, D.; Gopal, T.K.S.
    Tuna packed in oil medium was processed in aluminium cans to a Fo value of 10. Heat penetration characteristics were determined by processing to a Fo value of 10 in a rotary retort and comparing the results with the values from a stationary retort. Rotation of the cans has an effect on heat penetration in the thermally processed fish products. For studying the changes in heat penetration during rotation, tuna in oil was packed in aluminium cans (301X203) and subjected to different rotational speeds (2 rpm, 4 rpm, and 6 rpm) during thermal processing to the same Fo value of 10 by rotating the cage of the overpressure autoclave. For the same Fo value of 10 although there was a reduction in process time up to 6 rpm, the reduction in process time beyond 2 rpm was less significant.
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    Effects of Different Oil Cakes on the Growth and Survival of Liza parsia (Hamilton-Buchanan, 1822)
    (Society of Fisheries Technologists (India)Cochin, 2005) Sawant, Gauri P.; Singh, H; Sawant, N.H; Shirdhankar, M.M
    Fry of mullet Liza parsia were fed with whole poultry egg based flakes diet supplemented with various oil cakes viz. Mustard Oil Cake, Groundnut Oil Cake and Soya Cake. The experiment was conducted with five replicates for 90 d. The maximum length gain, weight gain, specific growth rate and survival recorded was 429.20%, 2140.38%, 3.45% and 86.00% respectively in diet with mustard oil cake. Based on these results. Mustard Oil Cake can be used in feed for better growth and survival for fry of L. parsia
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    Field Study on Corals and Coral Living Organisms in Van Tivu, in the Gulf of Mannar
    (Society of Fisheries Technologists (India)Cochin, 2005) Sakthivel, M; Ramathilagam, G; Pushparaj, A
    The results of the study on corals in the Van Tivu island in the Gulf of Mannar, are presented. Eighteen species of stony corals were recorded in our study area. Favia, Porites, Acropora, Tubipoira, and Montipora spp., were found to contribute about 80% of the total coral population in Van tivu. The northeast and southwest transects were found to have higher percentage of corals. The molluscs alone contributed about 30% of the total reef fauna. The northeast transect had a good numerical data of molluscs. The vulnerable molluscan species from this area was found to be Sqm spp. Different types of coral reef fishes were present in the Van tivu. The notable ones are Butterfly fishes (Chaetodontidae), Parrot fishes (Scaridae), Clown and Damsel fishes (Pomacentridae) and Lion and Scorpion fishes (Scorpaenidae). Coral reef destruction was found to be caused by bio-eroding organisms. The common bio-eroders observed during our field study were lion fish, butterflies, wrasses, Echinometra mathei (Echinoderm) and Lambis spp. (Gastropods) and Tridacm spp. (Bivalves).
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    Fish productivity and associated factors among fishermen operating FRP crafts
    (Society of Fisheries Technologists(India),Cochin, 2005) Balasubramaniam, S.; Ramesan, M.P.; Gopal, N.
    The socio-economic variables of artisanal fishermen in Veraval (Gujarat) and Quilon (Kerala) are presented. Variables such as size of craft operated, fishing experience, annual maintenance cost of craft, net and engine, sale value of fish catch obtained per fishing day and annual income did not vary significantly between the fishermen in Veraval and Quilon fishing centers. The results revealed that on an average, the fishermen at Quilon had obtained a fish productivity level of 155kg per fishing day with a value of Rs. 1,794/-. For the fishermen at Veraval center, the fish productivity level was 91.5 kg per fishing day with sale value of Rs. 1,690/-. The multiple regression analysis revealed that the 13 variables taken together had significantly accounted for about 96 per cent of the variation in the fish productivity levels at both centers. The constraints reported by these fishermen operating smaller FRP crafts (8-9 m LOA) were recorded.
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    Fuel consumption pattern by the mechanized fishing sector in kerala
    (Society of Fisheries Technologists (India), Cochin, 2005) Unnithan, G.R.; Gopal, N.; Nair, V.R.; Nasser, M.
    Results of the study on the fuel utilization pattern in the mechanized fishing sector in Kerala, India are presented. Stratified random sampling revealed the fuel consumption of 97204 kL by 3823 crafts, with an expenditure of Rs. 204 crores at the price level of 2002, during which only 55% of the fishing capacity was found utilized. The substantial fuel expenditure calls for optimum fuel utilization measures and appropriate management of fishing operations.
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    Selectivity of trawls
    (Society of Fisheries Technologis(India), 2005) Boopendranath, M.R.; Pravin, P.
    Responsible fishing regime requires that fishing gear should preferentially catch the adult fish at a particular age, which would maximize yield while permitting the juveniles and sub-adults to escape and also minimize the catch of non-targeted and protected organisms. In this review, selectivity characteristics of trawls are discussed in the context of their relevance in conservation of fishery resources, development of selective fishing gears and fisheries management. Different methods used for determining trawl selectivity are discussed along with recent developments related to trawl selectivity such as evolution of selective trawls, use of square mesh in trawl construction, and optimum mesh size determination for multispecies trawl fisheries.
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    Technological Properties and Biochemical Studies of Bonga Ethmalosa fimhriata
    (Society of Fisheries Technologists (India)Cochin, 2005) Akande, G.R; Faturoti, E.O
    Size measurements, anatomical composition and biochemical evaluations of bonga (Ethynalosa fimhriata) muscle were carried out. The mean values of length and weight recorded for bonga over a period of 2 months were 22.12+1.27 cm and 136.82±13.27 g respectively. Size measurements as shown by length and weight data for the one-year period suggested a positive effect of season on size. The pattern of change in weight throughout the study period was similar to that of change in length and gave a correlation coefficient " r " of 0.82 significant at p<0.05. Anatomical fractionation showed that bonga contained on the average 61.1% trunk, 23.7% head and 16.3% viscera. Total wastes (head and viscera) derived from bonga were 39.9% of the total body weight. The proximate chemical composition analysis showed that the muscle of bonga contained between 74.14% and 77.54% moisture, 1.12-5.69% lipid, 18.73- 21.54% protein and 1.57- 2.14% ash. The chemical composition did not vary significantly except in lipid content where a significant (p<0.05) inverse relationship between moisture and lipid content was observed. Triglycerides accounted for over 5% of lipid in bonga. The major fatty acid component in the lipid of bonga were C 16:0, C 18:0, C 18:1, C 20:4, C 20:5and C 22:6.
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    Utilization of rubber wood for fishing canoe construction
    (Society of Fisheries Technologis(India), 2005) Leela Edwin; Thomas, S.N.; Meenakumari, B.
    The wood from the rubber tree (Hevea brasiliensis) comes as a by-product from the commercial plantations. The highly perishable nature of the wood makes it unsuitable for use such as boat building without chemical preservative treatment. This communication deals with the chemical preservative treatment of rubber wood with copper- chrome- arsenic (CCA), a water borne preservative and creosote an oil borne preservative through immersion in an open tank for the purpose of fishing canoe construction. The fabrication of the canoes was as per the method of construction of plank built canoes. Two canoes were made, one for use in brackish water and the other for use in the sea. The cost of construction was found to be lower than that of the conventional canoe. The performance monitoring shows that the canoes are free from physical damage and deterioration caused due to weathering and biological agencies.