• Rapapport's broth, a better enrichment medium in the identification of Salmonella from processed frog legs

      Rajagopalan, D.; Despande, C.K.; Joshi, L. (1985)
      Live clams (Villorita cyprinoides) collected from their natural beds were packed in different ways like dry pack, tray pack, in oxygenated water (wet pack) and depurated samples in wet pack. It was found that the packaging in l kg lots in 200 gauge polythene bags with oxygen at a temperature of 20°C could keep them live for 4 days. In tray pack without oxygen and water they can be kept alive for 3 days at 20°C. Temperature seems to be the critical factor in the transportation of live clams. At room temperature both dry and wet pack can be kept for 24 h only. Depuration technique does not appear to be useful in prolonging the storage life of clams in live condition as percentage mortality is more at 48 h both at 20°C and room temperature compared to the non-depurated samples.
    • Rate of filtration by Perna viridis pre-exposed to heavy metals

      Prabhudeva, K.N.; Menon, N.R. (1985)
      Perna viridis exposed to different concentrations of copper and zinc for varying periods and then the rate of filtration estimated under metal free culture conditions. The concentrations under which the animals were maintained before the experiments were 0.025 to 0.150 p.p.m. of zinc and 0.005 to 0.08 p.p.m. of copper.
    • Rational exploitation of Catla catla (Ham) from Hirakud reservoir: a preliminary account

      George, V.C.; Khan, A.A.; Varghese, M.D. (1979)
      Frame nets and simple gill nets of identical mesh size were experimented to determine their comparative efficiency for exploiting economic size group of Catla catla. The results indicated that frame nets of 90 mm mesh bar as the most effective.
    • Raw material supply to shrimp freezing plants: some significant aspects

      Krishna Rao, K.; Lakshmanan, P.T.; Agarwal, A.; Chakraborty, R. (1986)
      The shrimp processing plants located at any particular place receive their raw material supplies from local and outside centres. The raw material received, the form in which it was received, the relative contribution by local and outside centres and the seasonal variation in the supplies were studied with respect to the shrimp processing plants located at three places - Cochin, Veraval and Kakinada.
    • Reaction of fishes to the underwater A.C. field

      Biswas, K.P.; Karmarkar, S.P. (1976)
      A comparative study on the effect of A.C. field on Puntius ticto, Heteropneustis fossilis and Tilapta mossambica was carried out using a slowly rising field intensity. Well defined reactions appeared in the species of fish with slight specific variations, depending on their orientation in the electrical field, on reaching the field intensity to specific value. These reactions can be distinguished as first reaction, when the fish perceive the surrounding field, jerky swimming when parallel to the current lines (longitudinal oscillotaxis), the static position finally adopted by the fish sooner or latter depending on the potential gradient (transverse oscillotaxis), and a state of muscular rigidity (tetanus). After switching off the current, a hypnotic condition prevailed in the treated fishes before returning to their normal swimming condition. The orientation of fish body in the field had an important bearing on the behaviour reactions and current thresholds necessary for those reactions. Initial reaction, jerky swimming between electrodes and hypnosis after stoppage of current appeared in fishes earlier when the fish body was in parallel to the current lines, whereas fishes responded to transverse oscillotaxis quickly when perpendicular to current lines.
    • Recent developments in fish processing and preservation

      Pillai, V.K. (1966)
      A review of the literature on fish processing will reveal that most of the important developments have taken place during the last twenty years. Sustained work by teams of scientists in different parts of the world, has not only contributed much to our knowledge of the chemistry and technology of fish but also resulted in revolutionary changes in the methods of preservation and processing of fishery products.
    • Record of cestode parasites from Penaeid prawns of Ratnagiri

      Gore, P.S.; Ranade, M.R. (1971)
      Studies on the cestode parasites of commercially important prawns are few. So far only four species of larval cestodes have been recorded from penaeid prawns of Florida (Woodburn et al., 1957, Sparks and Mackin, 1957, Hutton et al, 1959 and Kruse, 1959). So far there are no records of larval cestodes from prawns of India. For the first time the authors have been able to collect six forms of larval cestodes from penaeid prawns of Ratnagiri.
    • Red and white meat of tuna (Euthynnus affinis): their biochemical role and nutritional quality

      Mukundan, M.K.; James, M.A.; Radhakrishnan, A.G.; Antony, P.D. (1979)
      The biochemical and nutrient compositions of red and white meat of tuna are reported. Based on the data the biochemical role and nutritional quality of red and white meat are discussed. The results show that red meat is adapted for slow and continuous activity and white meat for quick but occasional activity. In spite of comparatively low lysine content the red meat is adjudged more nutritious than white meat.
    • Relation between weight and linear measurement of shell in C. madrasensis (Preston)

      Unnikrishnan Nair, T.S.; Balakrishnan Nair, N. (1986)
      Relation of weight to height, length and breadth in the Indian backwater oyster Crassostrea madrasensis (Preston) is reported. The relative importance of the variables on weight was found to be height, length and breadth in their order of preference. The multiple regression V = -0.4017 + 0.46743 X + 0.8278 Y + 0.1130 Z can be used to estimate the meat weight (logarithm) for given dimensions of length, height and breadth (all in logarithms). An exponential relation between weight and height is also observed.
    • Relationship between water, lipid and protein in the muscle, liver and gonad in a freshwater fish Puntius filamentosus (Val.)

      Vijayakumar, B. (1987)
      Details are given of a study investigating the relationship between water, lipid, and protein in Puntius filamentosus. Percentage compositions in the muscle, liver and gonad of fish specimens from Lake Vellayani in India are given, showing the fluctuations which occur during maturation.
    • Relative retentivity of knowledge in fish processing by fisherwomen

      Thiagarajan, R.; Kandoran, M.K. (1989)
      Retention of knowledge in the preparation of fish pickle, fish wafers and fish soup powder for an experimental group of 20 fisherwomen selected from three fishing villages was studied. The knowledge retention immediately after exposure and also at intervals of 15 days and 30 days after exposure differed significantly.
    • Reliability and need for standardisation of electrical systems in small wooden fishing vessels

      Sreedharan Namboodiri, K. (1976)
      The working condition and atmosphere in a wooden fishing vessel are generally most injurious to the electrical systems. Therefore great care has to be taken in designing electrical systems for small c1afts. This paper deals with the difficult operating conditions and standardisation of electrical systems as applicable to small fishing vessels.
    • Reliability of Escherichia coli and faecal streptococci as indicators of Salmonella in frozen fishery products

      Gopalakrishna Iyer, T.S.; Shrivastava, K.P. (1989)
      The results obtained in the present study suggest that Escherichia coli and faecal streptococci are of little value as indicators of the possible presence of Salmonella in frozen fishery products.
    • Removal of fungus and prevention of fungal reinfestation in stored dry salted fish

      Unnikrishnan Nair, T.S.; Kalaimani, N.; Muraleedharan, V.; Joseph, K.G. (1983)
      A simple and effective method is described for converting dry fish products infested with fungus and red halophilic bacteria to acceptable ones. Washing, drying and then smearing with a mixture of 3% sodium propionate in dry, refined salt in a ratio of 1 part mixture: 10 parts dry fish resulted in the fish having a shelf life of 5 months.
    • Report on the occurrence of one subspecies of Scylla serrata (Forskal) in Cochin backwaters

      Radhakrishnan, C.K.; Samuel, C.T. (1982)
      The taxonomy of the mud crab, Scylla serrata has become a topic of interest. Alcock (1899) described this species from Indian waters. It was considered that under the genus Scylla, only one species, namely, Scylla serrata was valid. But Estampador (1949) revised the genus and reported the occurrence of four sorts, Scylla serrata, S. tranquebarica, S. oceanica and a variety S. serrata, var paramarnosain in Philippine waters. He established his claim based on the morphology such as colouration, relative length of chelae and also on the cytological events during gametogenesis. Serene (1952) pointed out that two distinct categories under this genus were demonstrable on the basis of colouration. But Stephenson & Campbell (1960) concluded them as only synonyms, but pointed out the need for further investigations.
    • Response of extract release volume to the variations in pH and microbial load during spoilage of fish at refrigeration temperature

      Bachhil, V.N. (1982)
      This report briefly describes the microbial status and storage properties of fish raised under composite fish culture in sewage fed ponds.
    • Response of fishes to the underwater D.C. field

      Biswas, K.P.; Karmarkar, S.P. (1976)
      Response to external electric field (D. C.) of three different varieties of fish namely Puntius ticto, Heteropneustis fossilis and Tilapia mossambica having different anatomical and behavioural characteristics were studied. Clearly distinguished reactions occurred one after another m all the varieties of fish with the increase in field intensity with minor specific variations. These reactions can be broadly classified into initial start (first reaction), forced swimming (galvanotaxis), slackening of body muscle (galvanonarcosis) and state of muscular rigidity (tetanus). The orientation of the organism (projection of nervous element) to the surrounding field has been found to have important bearing on the behaviour reactions. Clearly differentiated anodic taxis and true narcosis set in when fish body axis was parallel to the lines of current conduction. But with greater angle between the body axis and the current lines, fish did not show well marked reactions. Fish body, when perpendicular to current lines responded for anodic curvature and off balance swimming followed by tetanus.
    • Results of comparative fishing trials with rectangular flat and rectangular curved otter boards

      Deshpande, S.D.; Sivan, T.M.; Ramarao, S.V.S. (1970)
      The communication deals with the results of comparative fishing operations conducted to study the effectiveness of rectangular flat and rectangular curved otter boards. Based on the analysis of data gathered during the course of actual field trials, following conclusions have been drawn: the average catch per hour of trawling was more by 22 kg during attachment of rectangular curved otter boards. The average horizontal spread between rectangular curved otter boards in action was more by 13% and works out to 50% of the head-rope length of the net including sweeps. The towing resistance of the gear with horizontally curved otter boards was more by 10%.
    • Results of preliminary fishing trials with 15.8m six-seam otter trawl

      Deshpande, S.D.; Ramarao, S.V.S.; Vijayan, V. (1970)
      The paper deals with the results of trawling operations conducted along the Saurashtra Coast of Gujarat State with 15.8 m six-seam otter trawl. Fishing operations carried out from Fishtech No. 8 with this new net were the first of their kind in the country and the results proved to be encouraging. The design in question is passed on to private agencies for commercial operations.
    • Role of technology in the development of fisheries

      Velankar, N.K. (1968)
      The basic purpose of fishing is to catch/harvest as much fish as possible and reach it to the consumer as a wholesome, acceptable food, though fishery development programs are based on diverse objectives which include, besides the production of a valuable food, creation of employment opportunities, socio-economic uplift of the fishermen community, and earning foreign exchange through export. Both the production and the utilization of fish depend intrinsically on the efficient application of technology.