BIOLOGY OF THE LARGE SNAKE-HEAD OPHICEPHALUS MARULWS; (HAM.) IN BHAVANISAGAR WATERS


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Authors

  • M Devaraj Freshwater Biological Research Station, Bhavanisagar

Abstract

Lengthfrequency distribution of OpA/cepAa/(«war«/i«i(Hani.)fromPoongar Swamp
dissected out by probability plot technique produced fouryear classes, von Bertalanffy's
growth equation adequately describes the growth of O. marulius. The mean length at
first maturity is 460 mm in females and 550 miu in males. The Im/Loo value for the former
is 0.41 and for the latter 0.45. A rapid fall in fecundity is observed in olderfishes (4 year
and above). Peak spawning occurs during November and December in the swamp but
during June and July in theriver and reservoir. Parental care ceases when the young ones
are 4-month old. Fish less than 50mm long feed on zooplankton especially Dapfiniabni
those 50 to 110mm long prey upon Macrohrachium and larger insect nymphs

Author Biography

  • M Devaraj, Freshwater Biological Research Station, Bhavanisagar
    Freshwater Biological Research Station, Bhavanisagar

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Issue

Vol. 20 No. 2 (1973)

Section

Articles

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How to Cite

Devaraj, M. (2011). BIOLOGY OF THE LARGE SNAKE-HEAD OPHICEPHALUS MARULWS; (HAM.) IN BHAVANISAGAR WATERS. Indian Journal of Fisheries, 20(2), 280-307. https://epubs.icar.org.in/index.php/IJF/article/view/12397