Estimates of growth, mortality and stock of the Indian squid Loligo duvauceli orbigny, exploited off Mangalore Southwest coast of India

Mohamed, K S (1996) Estimates of growth, mortality and stock of the Indian squid Loligo duvauceli orbigny, exploited off Mangalore Southwest coast of India. Bulletin of Marine Science Miami, 58 (2). pp. 393-403.

[img]
Preview
PDF
478.pdf

Download (574kB)
Related URLs:

    Abstract

    Both male and female Loligo duvauceli exploited off Mangalore exhibited allometric growth. The growth rate and asymptotic length (males = 41.5 cm: females = 24.5 cm) showed distinct differences between sexes. Females grew at a faster rate (K = 1.15 + 0.086 yr-'; P < 0.05). while males grew slower (K = 0.92 2 0.078 yr '; P < 0.05) but reached a larger ultimate size and age. The life-span is estimated to be 3.2 years for males and 2.6 years for females. The total average annual stock was estimated as 1088 tons and the average exploitation ratio for the period was above 0.7 for both sexes. but showed a declining trend. The maximum sustainable yield (MSY) was estimated as 877.3 tons and this could be achieved by a 358 decrease in fishing effort. Studies revealed the need for regulation of the fishery by raising the age at first capture (from 0.3 to 0.8 yr for males and from 0.5 to 0.6 yr for females) by increasing the cod-end mesh size of the trawl net by 80%

    Item Type: Article
    Uncontrolled Keywords: Estimate; growth; mortality; stock assessment; Indian squid; Loligo duvauceli orbigny; Mangalore; Southwest coast of India
    Subjects: Molluscan Fisheries > Cephalopods
    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: Arun Surendran
    Date Deposited: 10 Nov 2010 06:13
    Last Modified: 09 Sep 2015 15:36
    URI: http://eprints.cmfri.org.in/id/eprint/6072

    Actions (login required)

    View Item View Item