Cephalopod fishery and population dynamics of Loligo duvauceli (Orbigny) off Saurashtra region, Gujarat

Thomas, Sujitha and Kizhakudan, Shoba Joe (2006) Cephalopod fishery and population dynamics of Loligo duvauceli (Orbigny) off Saurashtra region, Gujarat. Indian Journal of Fisheries, 53 (4). pp. 425-430.

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    Abstract

    The fishery of cephalopods and some aspects of population dynamics of the Indian squid Loligo duvauceli from Veraval and Mangrol in Saurashtra region was studied for the period 1996-99. The average annual landing of cephalopods by trawl in Veraval and Mangrol were estimated at 3911t and 1030t respectively, which contributed 4.8 and 5.7% of the total fish landings in Veraval and Mangrol. Loligo duvauceli dominated the catch (58%) , followed by Sepia aculeata (19%), S. elliptica (19%), S.pharaonis (3%) and Sepiella inermis (1%). The length weight relationship was estimated for males and females of Loligo duvauceli as W= 0.109011 L 2.634609 and W = 0.314656 L 2.185796 respectively. The estimates of VBGF parameters were L! = 303mm and K= 0.98 year -1. The mortality rates values Z, M, F were 3.94, 1.94 and 2.20 respectively. The exploitation rate was 0.56. The present study shows that the resource is exploited above the optimum level and the effort has to be reduced for sustaining the resource for long term exploitation

    Item Type: Article
    Uncontrolled Keywords: Cephalopod fishery; population dynamics; Loligo duvauceli Saurashtra region; Gujarat
    Subjects: Molluscan Fisheries > Cephalopods
    Marine Fisheries > Population Dynamics
    Divisions: CMFRI-Kochi > Marine Capture > Molluscan Fisheries
    Subject Area > CMFRI Brochures > CMFRI-Kochi > Marine Capture > Molluscan Fisheries
    CMFRI-Kochi > Marine Capture > Molluscan Fisheries
    Depositing User: Dr. V Mohan
    Date Deposited: 12 Nov 2010 06:01
    Last Modified: 09 Sep 2015 15:37
    URI: http://eprints.cmfri.org.in/id/eprint/6270

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