Investigations on unexplored brachyurans (Decapoda), Charybdis hoplites (Wood-Mason, 1877) and Charybdis smithii MacLeay, 1838, from trawl discards of the Southeast Arabian Sea ecosystem

Dineshbabu, A P and Thomas, Sujitha and Maheswarudu, G (2018) Investigations on unexplored brachyurans (Decapoda), Charybdis hoplites (Wood-Mason, 1877) and Charybdis smithii MacLeay, 1838, from trawl discards of the Southeast Arabian Sea ecosystem. Crustaceana, 91 (12). pp. 1453-1464.

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    Abstract

    The effectiveness of GIS-based resource mapping to strengthen the database for Ecosystem-Based Fisheries Management (EBFM), was tested in an attempt at resolving the existing gap in the data on non-commercial resources. In this paper we describe the result of that try by giving an example of one of the most important influential species in the benthic ecosystem of the Southeast Arabian Sea (SEAS). An estimated 2803 t of Charybdis hoplites, a relatively little known species from the coast, are yearly caught and discarded by trawlers operating from the Mangalore fisheries harbour. A GIS-aided study on distribution and abundance estimated, that the average biomass of the species is 322.7 t, at any time in the area covered. This study brings out the fact that a number of non-commercial biota are serving as non-detectable factors in sustaining productivity. The identification of their role and the quantification of their biomass thus constitute important data for an effective implementation of EBFM.

    Item Type: Article
    Uncontrolled Keywords: unexplored brachyurans; Decapoda; Charybdis hoplites; Charybdis smithii MacLeay; trawl discards; Southeast Arabian Sea ecosystem; — GIS, trophic importance, EBFM, trawling, crabs, biomass, Arabian Sea
    Subjects: Crustacean Fisheries
    Crustacean Fisheries > Crabs
    Marine Fisheries > Bottom Trawling
    Divisions: CMFRI-Mangalore
    Depositing User: Arun Surendran
    Date Deposited: 29 Oct 2018 05:55
    Last Modified: 28 Feb 2019 05:31
    URI: http://eprints.cmfri.org.in/id/eprint/13098

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