Observations on some aspects of biology and population dynamics of the Scad Decapterus Russelli (Ruppell)(Carangidae) in the trawling grounds off Kakinada

Murty, V Sriramachandra (1991) Observations on some aspects of biology and population dynamics of the Scad Decapterus Russelli (Ruppell)(Carangidae) in the trawling grounds off Kakinada. Journal of the Marine Biological Assocation of India, 33 (1&2). pp. 396-408.

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    Abstract

    Decapterus russelU (Ruppell)* is abundaat in relatively deeper waters and forms 80-90 % of carangid catches by trawlers. The von Bertalanffy growth parameters are estimated as Loe =• 232.3 mm, K =- 1.08 per year and to =» —0.08 year. The length-weight relationship can be described by the equation log W (g) = —5.93433+3.40764 log L (mm). The length and age at first maturity are estimated as 150mmand0.88 year respectively. This species spawns offKakinada during December-August. The different mortality rates are estimated as Z = 6.65, M «= 1.90 and F = 4.75 and the length and age at first capture as 158 mm and 0.98 year respectively. The yield per recruit analysis shows that: with t« above 0.6 the Yw/R increases with increased F without reaching maximum. The highest Yw/R, however, is obtained with tc at 0.6 only.

    Item Type: Article
    Uncontrolled Keywords: Scad; Decapterus russelli ; Ruppell
    Subjects: Marine Fisheries > Population Dynamics
    Demersal Fishes > Carangids
    Divisions: CMFRI-Kochi > Marine Capture > Demersal Fisheries
    Subject Area > CMFRI Brochures > CMFRI-Kochi > Marine Capture > Demersal Fisheries
    CMFRI-Kochi > Marine Capture > Demersal Fisheries
    Depositing User: Users 5 not found.
    Date Deposited: 21 Jun 2010 06:57
    Last Modified: 09 Sep 2015 15:10
    URI: http://eprints.cmfri.org.in/id/eprint/1172

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