ECOLOGY OF THE BLUE CRAB PORTUNUS PELAGICUS (LINNAEUS) AND ITS POTENTIAL FISHERY IN ZUARI ESTUARY


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Authors

  • Rajinder M Dhawan National Institute of Oceanography, Panaji, Goa.
  • S N Dwivedi National Institute of Oceanography, Panaji, Goa.
  • G Victor Rajamanickam National Institute of Oceanography, Panaji, Goa.

Abstract

The occurrence of the tblue cra'b Portill/IIS peiagicils was studied from
December 1972 to April 1973 in Zuari estuary. Environmerital parameters, 'liz.,
temperature, saHnity, oxygen, light penetpation and nature of bottom wer~ also
9tudied. 4519 Crabs were caught in 26 trawls; the males were 67.54% and the
females were 32.46%. The dominant size groups for males 'and females were
115 mm and 105 mm, respectively. Females mature at a smaller size and breeding
Mkes place during February-March. The widthlweight reitationship study show,~d
that females were heavier. The 'regression equation for female is:
weight = 4.233 x 10-9 x L 4.969, and for male is:
we:ght = 2.750 x 10-6 x L 3,636. The crabs were found to prefer loamy soil.
The crab Portlll1l1S pefagiclIs constitutes a good food resource in the moutl>, region
of Zuari estuary.

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Author Biographies

  • Rajinder M Dhawan, National Institute of Oceanography, Panaji, Goa.
    National Institute of Oceanography, Panaji, Goa.
  • S N Dwivedi, National Institute of Oceanography, Panaji, Goa.
    National Institute of Oceanography, Panaji, Goa.
  • G Victor Rajamanickam, National Institute of Oceanography, Panaji, Goa.
    National Institute of Oceanography, Panaji, Goa.

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Issue

Vol. 23 No. 1 & 2 (1976)

Section

Articles

License

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How to Cite

Dhawan, R. M., Dwivedi, S. N., & Rajamanickam, G. V. (2011). ECOLOGY OF THE BLUE CRAB PORTUNUS PELAGICUS (LINNAEUS) AND ITS POTENTIAL FISHERY IN ZUARI ESTUARY. Indian Journal of Fisheries, 23(1 & 2), 57-64. https://epubs.icar.org.in/index.php/IJF/article/view/12177