• Echo location of fishes in Dhudawa reservoir (Madhya Pradesh)

      George, V.C. (1982)
      An investigation was undertaken in order to locate fish using an echo sounder in Dhudawa Reservoir, Madhya Pradesh, India. In general, fish were found to be distributed either towards off-bottom or mid-water areas. Echo sounding is recommended for use in other reservoirs for fish detection.
    • Ecology and production in two sandy beaches of Goa. Part (A) Distribution of bacteria in Colva and Siridaon in relation to certain environmental parameters

      Gore, P.S.; Singbal, S.Y.S. (1973)
      Qualitative and quantitative studies on the bacterial flora of two beaches viz., Colva and Siridaon at high tide, mid-tide and low tide levels during the pre-monsoon period were made. Estimations of important nutrients, like inorganic phosphates and nitrates and organic carbon have been made and correlation with the bacterial counts is being attempted. Definite correlation between bacterial population and organic carbon is seen however, no correlation is observed between bacterial counts and other physicochemical parameters.
    • Ecology of Indian estuaries-XI. A preliminary survey of the fishery resources of the Ashtamudi estuarine system

      Balakrishnan Nair, N.; Kumar, K.K.; Rajasekharan Nair, J.; Abdul Azis, P.K.; Dharmaraj, K.; Arunachalam, M. (1983)
      The fish fauna of the Ashtamudi, the second largest estuarine system in Kerala (8°53'-9°02' N Lat. and 76°31'-76°41' E Long.) is listed. 97 species belonging to 39 families have been recorded, ofwhich69 are commercially important contributing to the fisheries of the Ashtamudi Estuary. Mullets, cichlids and the glassy perchlets are the most abundant groups and contribute appreciably to the landings. Results revealed that the estuarine system supports a good capture fishery which is seasonal. Majority of the fish fauna in the estuary are marine elements recruited from the adjoining Arabian Sea. An inventory of the craft and gear employed is presented and the sources of pollution in the estuarine system are described, aquacultural prospects of this area are discussed.
    • Economic analysis of 22m and 23m deep sea trawlers

      Unnithan, G.R.; Krishna Iyer, H.; Srinivasa Rao, P. (1985)
      The cost-benefit analysis of 23m and 22m trawlers operated from Visakhapatnam base is presented. The study indicated that the deep sea fishing in Indian waters is a profitable venture. The profit over capital investment for a 23m trawler worked out to about 18% whereas the same was about 10% for a 22m trawler. Catch per trawling operation, cost of production, productivity per man year, energy yield etc. establish the economic superiority of 23m vessel.
    • Economics of gill netting and two boat midwater trawling

      Sadanandan, K.A.; Kartha, K.N.; George, T.P.; Krishna Iyer, H. (1988)
      The paper deals with the economic aspects of operation of gill netting and two boat midwater trawling conducted off Cochin. The data collected on two boat midwater trawling and gill netting during 1979 and 1980-81 are presented. Gill netting was profitable at the range of 17.5 and 25.2% while two midwater trawling was profitable at the rate of 18.5 %.
    • Edible fish powder from Dhoma (Sciaenids spp.)

      Solanki, K.K.; Devadasan, K.; Venkataraman, R. (1977)
      Edible fish powder of high protein content was prepared from Dhoma (Sciaenids) using different methods. A comparative account of the yield and quality of the products prepared by these methods is presented.
    • Effect of aureomycin on the behaviour of certain free amino acids in oil sardine (Sardinella longiceps) held in ice storage

      Jacob, S.; Karthiayani, T.C.; Rajendranathan Nair, M. (1964)
      The course of development of a few free amino acids under the influence of aureomycin in oil sardine (Sardinella lingiceps) held in ice storage was investigated. The levels of leucines and valine regularly increased in the control and aureomycin treated fush throughout the storage period. Alanines and threonine showed similar trend in both control and fish treated with 20ppm aureomycin. These amino acids however showed a gradual fall in fish treated at 5 ppm level. The changes in tyrosine+tryptophane were found to be irregular. Most of the amino acids studied indicated a remarkable change in trend by about the 16th day of ice storage in the case of fish treated with 50ppm aureimycin.
    • Effect of box stowage on quality fish

      Savagaon, K.A.; Power, H.E. (1976)
      Quality of boxed cod and haddock was compared with that of penned fish in terms of organoleptic grading, trimethylamine values, Intelectron Fish Tester readings and fish and fillet yield. Boxed fish showed a higher percentage of grade one fish than penned fish. TMA values, however, did not differ greatly. There was less physical damage due to squeezing with boxed fish and consequently a greater yield of landed round fish and fillets.
    • Effect of chilled sea water storage of oil sardine (Sardinella longiceps) on quality changes during frozen storage

      Dora, K.C.; Hiremath, G.G. (1987)
      The shelf-life of frozen oil sardine (Sardinella longiceps) can be improved by preserving the fish immediately after catch in chilled sea water before freezing. Delayed icing caused considerable deterioration in quality and reduced frozen shelf-life. Oil sardine preserved in chilled sea water were found to be suitable for freezing up to 5 days whereas iced samples could be frozen only up to 2 days.
    • Effect of chitin and prawn shell on the growth of albino rat

      Mathew, P.T.; Ramachandran Nair, K.G.; Madhavan, P.; Prabhu, P.V. (1989)
      The effect of addition of pure chitin from prawn shell, deproteinised prawn shell, demineralized prawn shell and dry prawn shell in casein based control diet on albino rats was studied. The diets contained 0.5% chitin and 10% protein. The results obtained in the studies show that the weight gain and feed conversion were maximum in the control diet. While addition of pure chitin slightly brought down the weight gain, addition of deproteinsed prawn shell have the minimum weight gain showing that presence of minerals adversely affects both feed consumption and weight gain in the case of albino rats. Although it was reported that addition of pure chitin at 0.5% in the commercial feed of broiler chicken gave increased weight, in the case of albino rats the weight gain was slightly reduced compared to control diet.
    • Effect of colour on the catch of gill nets

      Rao, J.S.; Dawson, P.; Sreekrishna, Y. (1980)
      The effect of white, green, blue and yellow coloured drift gill nets on their catch with respect to Scomberomorus guttatus (Schneider), Scomberomorus commerson (Lacepede), Scomberomorus lineolatus (Cuvier), Parastomateus niger (Bloch), Euthynnus ajjinis (Cantor) and sharks Carcharius melanopterus is discussed. White nets were more effective for S. guttatus while the coloured ones caught more of P. niger. Blue had no significant effect for sharks. In the case of S. lineolatus, S. commerson and E. affinis no preference to colour was noted.
    • Effect of cooking and drying on carbonyls of oil sardine

      Ammu, K.; Devadasan, K. (1989)
      Changes in the total as well as major individual carbonyls of oil sardine during steam cooking, oven drying, sun drying and freeze drying are presented. Carbonyls extracted with hexane were converted to their 2:4 dinitro phenyl hydrazone (DNPH) derivatives and were separated into major classes by column chromatography on celite/magnesia. Individual carbonyls were then identified by capillary gas chromatography of the DNPH derivatives. Dehydration and heating increase the carbonyl production from highly unsaturated fish lipids. The carbonyls produced react with other muscle constituents leading to complex changes. The influence of the mode of dehydration on these different aspects and their net effect on flavour are discussed.
    • Effect of demonstration in transferring fish processing technology

      Thiagarajan, R.; Kandoran, M.K. (1988)
      A group of 28 fisherwomen who attended demonstration on three subjects, namely, preparation of fish wafers, fish pickles and fish soup powder showed significant knowledge and skill gain for all the three messages. The total knowledge and skill gain was maximum for preparation of fish wafers followed by that for preparation of fish soup powder and fish pickles.
    • Effect of different media on the determination of the number of micro organisms in frozen prawns (shrimp)

      Rajagopal, M.V. (1965)
      The Indian standards Institution have recently laid down specifications for the grading of frozen shrimp of which the bacterial examination of the product forms a significant part. Work carried out in this regard in our laboratories have shown that various improvements could be made in the composition of the medium to obtain a more true picture of the total bacterial count. Changes in the medium for total bacterial count have, therefore, been suggested and the reasons for the same discussed.
    • Effect of electric stimulation on heart beat and body muscle in fish

      Biswas, K.P.; Karmarkar, S.P. (1979)
      The effect of AC and DC electric stimulations on the heart-rate and the entire body of Heteropneustis fossillis, Tilapia mossambica and Macrobrachium rosenbergii were studied and presented in kymograph tracings. The reaction of spinal cord in Puntius ticto, Heteropneustis fossilis and Tilapia mossambica to D. C. field was observed to find out its role in electric shocks. A test-check of the electrical resistance of a few species was also conducted. The effect of D. C. and A.C. on the body muscle was found to be the same as that in the case of frog. Different degrees of cardiac slowing were observed in AC and DC. Unbalanced galvanotropic movements were also noticed in spinal fishes.
    • Effect of frozen storage on the physical properties of corrugated fibre-board master cartons and waxed duplex cartons

      Srinivasa Gopal, T.K.; Govindan, T.K. (1981)
      Deteriorative changes in physical properties of corrugated fibre-board master cartons and waxed duplex cartons during frozen storage under commercial conditions were studied. Such changes due to prolonged exposure of these boards to moisture in the laboratory, effect of repeated wax-coating on the water resisting capacity of the boards and protection provided by increasing wax contents in the boards against water absorption and consequent deterioration in physical properties are reported.
    • Effect of hanging coefficient on the efficiency of frame net

      Khan, A.A.; Narayanappa, G.; Naidu, R.M. (1985)
      Comparative fishing experiments with frame nets of 0.4 and 0.5 hanging coefficients were conducted. Results indicate that net with hanging coefficient of 0.4 as more effective for better catch.
    • Effect of incubation period on plate count of raw ices and frozen fish

      Thampuran, N.; Krishna Iyer, H.; Mahadeva Iyer, K. (1983)
      The total viable counts were estimated in one hundred and sixty five samples of raw, iced and frozen fish using incubation periods of 24, 48, 72 and 96h. For raw fish, 24h and for iced and frozen fish 48h incubation of the plates were found to be adequate. Variation between samples was significant at 1% level for raw iced and frozen samples.
    • Effect of liquid nitrogen freezing and subsequent storage on survival of Staphylococcus aureus and Streptococcus pyogenes in treated prawn meat

      Chakrabarti, R.; Choudhury, D.R. (1988)
      Prawn meat treated with Streptococcus pyogenes B-49-2 culture and Staphylococcus aureus ATCC-12598 culture were frozen in conventional plate freezer at -40°C and by spray type liquid nitrogen freezer. The frozen products were stored at -18°C. Streptococcus pyogenes B-49-2 showed low sensitivity to cold injury during freezing and frozen storage. Staphylococcus aureus ATCC-12598 survived during the entire storage period of 240 days. Total bacterial count of untreated prawn meat was found to be always lesser in liquid nitrogen frozen products than that in plate frozen products.
    • Effect of mass media on the adoption of fish curing

      Kesavan Nair, A.K.; Kaul, P.N.; Balasubramaniam, S. (1985)
      A study of two factors with two-way classification shows that the main effect of newspaper subscription on the adoption of improved practices in fish curing is significant. The effect of radio ownership appears to be masked by newspaper subscription. The interaction between the two factors was not significant. The study confirms the importance of mass media in adoption.