FT Vol.37(1)

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    Bacterial Flora of the Intestines of Farm Raised Freshwater Fishes Catla catla, Labeo rohita and Ctenopharyngodon idella
    (Society of Fisheries Technologists (India)Cochin, 2000) Hatha, A;A.M; Kuruvilla, Seena; Cheriyan, Synobia
    Bacterial flora associated with the intestines of farm raised freshwater fishes such as Labeo rohita, Catla catla and Ctenophan/ngodon idella have been analysed. The mean population of total heterotrophic bacteria (THB) of the intestine of L. rohita was 3.2xl06 colony forming units (CFU) per gram and that of C. catla and C. idella were 4.79x10'' and 1.13xl07 CFU respectively. Morphological and physiological grouping of the isolates revealed dominance of gram negative rod shaped bacteria capable of elaborating various hydrolytic enzymes such as amylase, lipase and gelatinase. Ureolytic forms were relatively few. Characterisation of the genera revealed the dominance of Aeromonas in the intestine of these fishes. Other genera encountered were Corynebacterium, Micrococcus, Alcaligenes, Vibrio, Moraxella, Bacillus, Lactobacillus, Acinetobacter, Flavobacterium and members of the family Enterobacteriaceae.
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    Biochemical investigations on Antarctic krill Euphausia superba
    (Society of Fisheries Technologists (India), 2000) Ragunath, M.R.; Sankar, T.V.; Radhakrishnan, A.G.; Mathew, S.; Ammu, K.
    Antarctic krill (Euphausia superba Dana), caught by the first Indian krill expedition was processed on board into whole krill, peeled tail meat and whole krill mince. These were analysed for trace metals, lipids, cholesterol, fatty acids and amino acids. Autolysis at various pH and temperatures as well as thermal coagulation of krill mince suspended in various media were also studied. Trace metals were below toxic levels while no pesticides were detected. Krill tail meat had small amount of lipids and cholesterol (0.81 and 0.033% respectively). The lipids were rich in C18:1, C20:5, C22:6, fatty acids. Autolytic activity at pH 3-4 and 8-10 was predominant in whole krill at 20 and 40 degree C but autolysis in tail meat was very low. Nearly 80% of the soluble proteins in krill suspension could be precipitated by rapid heating.
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    Composite Farming of the Green Mussel, Perna viridis with the Shrimp Penaeus monodon along the Okhamandal Coast of Arabian Sea in Gujarat
    (Society of Fisheries Technologists (India)Cochin, 2000) Subrahmanyam, N; Gopalakrishanan, P
    The results of an onshore raft-cum-rope culture experiment of green mussel, Perna viridis with shrimp, Penaeus monodon in a shallow sea water pond system are reported. The seed of P. viridis measuring an average of 21.2 mm in length and 1.2 g in weight attained an average of 68.5 mm in length and 24.2 g shell on weight in 150 days of culture. The harvested mussel had a meat content of 32.66%. The results, when compared with the reported data in open sea farming from other parts of the country, were found to be highly encouraging
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    Effects of creosote and copper-chrome-arsenic (CCA) treatment on the compressive strength of haldu wood (adina cardifolia benth & hook)
    (Society of Fisheries Technologis(India), 2000) Leela Edwin; Thomas, S.N.
    The effect of preservative treatment on a secondary species of wood, Adina cordifolia (Haldu) was studied. Panels were impregnated with creosote, an oil borne preservative, and copper-chrome- arsenic (CCA), a water borne preservative, through immersion treatment. The compressive stress parallel to grain of panels at various preservative retention levels was assessed to find out the change in mechanical strength. An average reduction of 14% compressive stress was noticed in CCA treated haldu panels and slight increase of 2 - 6% was observed in creosote treated panels.
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    Inter-relationship Between Condition Coefficient (K) of Penaeus monodon and Heavy Metals from a Brackish Water Pond
    (Society of Fisheries Technologists (India)Cochin, 2000) Mitra, A; Mandal, T; Jamaddar, Y.A; Bhattacharyya, D.P
    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.
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    Sodium Acetate and Vacuum Packaging to Improve Shelf Life of Refrigerated Lethrinus lentjan Fillets
    (Society of Fisheries Technologists (India)Cochin, 2000) Shalini, R; Jasmine, G. Indra; Shanmugam, S.A; Ramkumar, K
    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