Peer Reviewed Journal Articles (Inter.) (FT)

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Browsing Peer Reviewed Journal Articles (Inter.) (FT) by Author "Boopendranath, M.R."

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    Estimation of Drift Gillnet Selectivity for Carangoides ferdau and Caranx papuensis in Kanyakumari Coast of South India
    (Asian Fisheries Society, 2011) Balasubramanian, A.; Meenakumari, B.; Erzine, K.; Boopendranath, M.R.; Pravin, P.
    Size selectivity parameters of drift gillnet for Carangoides ferdau and Caranx papuensis were estimated from catches obtained from the nets of 13.5, 14, 14.5 and 15 cm stretched mesh sizes operated in the Kanyakumari coast of South India from September 2002 to April 2004. In this study, maximum likelihood procedure was followed and a proprietary software GILLNET (Constat, Denmark) was used to fit selection curves viz., normal location, normal scale, log-normal, gamma and bi-normal. Of them, bi-normal model was found as best-fit for both the catch data. The fishing power influenced the selectivity of the gear in the case of C. ferdau while there was no influence in the other species C. papuensis. There was no significant difference between better-fit and best-fit models in both catch data. Modal length increased with mesh size. Shape and size of the selectivity curves were uniform in size. The mesh size 14.5 cm performed better than modeled by capturing larger size group of fishes with narrow selection range. Entangling and gilling appeared as common capture pattern in both the species. Over dispersion was found in the best-fit bi-normal model which also indicated the lack of fit and suggested for multi-nomial fitting of data.
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    First estimate of the length–weight relationship of diaphus watasei jordan and starks, 1904 caught off the southwest coast of india
    (Asian Fisheries Society, 2011) Vipin, P.M.; Pradeep, K.; Ravi, R.; Fernandez, T.J.; Ramesan, M.P.; Madhu, V.R.; Boopendranath, M.R.
    The length-weight relationship of the myctophid fish species, Diaphus watasei, caught from waters off the southwest coast of India in the depth range of 300-400 m was estimated as male W=0.0026 L3.39 and females W= 0.0063 L3.06. The length–weight relation between the males and the females were found to be significantly different.
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    Fish production and energy requirement during demersal and aimed midwater trawling by intermediate range freezer trawler
    (Asian Fisheries Society, 2009) Boopendranath, M.R.; George, V.C.; Hameed, M.S.
    This paper deals with the fish production and relative energy consumption in demersal and midwater trawling based on data derived from cruises of Intermediate range freezer trawler that operated in Indian waters during 1993-94. The trawler has length overall of 62.2 m, gross registered tonnage of 1898 and installed engine power of 2400 hp. Operations were conducted between 14° and 22° N lat., off west cost of India, within a depth range of 31 and 125 m, using 47.5 m four-seam bottom trawl rigged with bobbin gear and 70.0 m mid-water trawl. The present investigations have shown that significant improvements in landings were obtained during aimed midwater trawling, off west coast of India. The mean daily landings rose from an average of 5.66 t, during bottom trawling to 22.84 t, during midwater trawling, realising over 300% improvement in the landings that manifested in a significant reduction in the consumption of fuel per unit volume of fish landed by midwater trawling. Overall fuel consumption per kg fish landed by bottom trawling and midwater trawling worked to be 1.34 and 0.33 kg, showing a four-fold difference. The difference in daily fuel expenditure per unit volume of fish between bottom and aimed mid-water trawling was found to be highly significant statistically. As there is intense concentration of effort in the bottom trawl fisheries, it could be advantageous from the resource management perspective and also from the energy conservation point of view, to encourage diversification to midwater trawling, in a controlled manner without compromising on sustainability of resources. Stern trawler does not require any large-scale modifications in structure or deck layout, for undertaking midwater trawling. However, the vessel must be large enough, highly manoeuvrable and sufficiently powered to tow a large mouthed midwater trawl at speeds exceeding 4.5 knots; should be equipped with acoustic fish detection (sonar and echosounder) and trawl monitoring systems; and in addition, must have provision for handling and preserving large volume landings.