Length–weight relationships of three species of pelagic sharks from southeastern Arabian Sea

Najmudeen, T M and Zacharia, P U and Seetha, P K and Sunil, K T S and Radhakrishnan, M and Akhildev, S and Sipson, Augustine (2019) Length–weight relationships of three species of pelagic sharks from southeastern Arabian Sea. Regional Studies in Marine Science, 29. pp. 1-4.

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    Abstract

    Length–weightrelationships (LWRs) of three species of pelagic sharks belonging to the family Carcharhinidae viz., the silky shark Carcharhinus falciformis and the graceful shark C. amblyrhynchoides and Alopidae viz, the pelagic thresher Alopias pelagicus, were estimated based on 525 samples collected from the longline and gillnet fishery of southeastern Arabian Sea from January 2016 to November 2018. Two major fish landing centres of Kerala, southwest coast of India were selected for sampling; Cochin (Lat. 09N, Long. 76E) and Munambam (Lat. 10N, Long. 76E). The estimated allometric coefficient b value ranged from 2.687 (A. pelagicus, N = 122) to 3.11 (C. falciformis, N = 295). Coefficient of determination scores ranged from 0.901 (A. pelagicus) to 0.984 (C. amblyrhynchoides, N = 108), indicating robustness of the samples analysed. Maximum total length presented for C. amblyrhynchoides in this study was a new record. The study reports first estimates of length–weight relationships for three important species of pelagic sharks which contribute to most of the shark catches in the region, and the generated parameters will be useful for the assessment of stocks and sustainable management of pelagic sharks in southeastern Arabian Sea.

    Item Type: Article
    Uncontrolled Keywords: Allometric coefficient; Length–weight relationships; Longline fishery; Southeastern Arabian sea; Pelagic sharks
    Subjects: Demersal Fisheries > Shark fisheries
    Divisions: CMFRI-Kochi > Marine Capture > Demersal Fisheries
    Subject Area > CMFRI > CMFRI-Kochi > Marine Capture > Demersal Fisheries
    CMFRI-Kochi > Marine Capture > Demersal Fisheries
    Subject Area > CMFRI-Kochi > Marine Capture > Demersal Fisheries
    Depositing User: Arun Surendran
    Date Deposited: 06 Feb 2020 09:19
    Last Modified: 06 Feb 2020 09:19
    URI: http://eprints.cmfri.org.in/id/eprint/14085

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