Sciaenid fishery off Visakhapatnam with some aspects of population dynamics of Johnius carutta (Bloch)

Rajkumar, U and Rao, K Narayana and Kingsly, H Jose (2004) Sciaenid fishery off Visakhapatnam with some aspects of population dynamics of Johnius carutta (Bloch). Indian Journal of Fisheries, 51 (3). pp. 311-318.

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    Abstract

    The average annual catch of sciaenids by small-mechanized units operated off Visakhapatnam was 465 t, which formed 5.76% of the total landings. Of the thirteen species of sciaenids landed, Johnius carutta and Nibea maculata dominated the fishery. The estimated asymptotic length (L∝) and growth constant (K-year) of J. carutta were 295 mm and 0.40, respectively. The size at first maturity was 154 mm and the spawning season was during March - May. The mortality rates Z, F and M were 3.02, 2.05 and 0.97 respectively. The exploitation rate of 0.68 indicated heavy exploitation of the species. The yield/ recruit curves showed that the exploitation rate could be brought down to E max (0.57) without affecting the catch.

    Item Type: Article
    Uncontrolled Keywords: sciaenid fishery; johnius carutta
    Subjects: Demersal Fishes > Sciaenids
    Marine Fisheries > Population Dynamics
    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: 15 Mar 2010 12:44
    Last Modified: 09 Sep 2015 15:05
    URI: http://eprints.cmfri.org.in/id/eprint/159

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