Cannibalism, a cause of high mortality in Wallago attu (Schneider) larvae


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Authors

  • S K Sahoo Central Institute of Freshwater Aquaculture, Kausalyaganga, Bhubaneswar - 751 002, Orissa, India
  • S S Giri Central Institute of Freshwater Aquaculture, Kausalyaganga, Bhubaneswar - 751 002, Orissa, India
  • A K Sahu Central Institute of Freshwater Aquaculture, Kausalyaganga, Bhubaneswar - 751 002, Orissa, India

Abstract

A study was conducted to find the effect of stocking density on bio-growth, specific
growth rate, percent weight gain and survival of Wallago attu larvae during
in-door larval rearing. The larvae of average weight 2.64 + 0.21 mg and
length 5.80 + 0.36 mm were stocked at a density of 2,4,6,8 and 10 nos/l and
reared by feeding live zooplankton, for a period of 10 days. The final body weight,
specific growth rate and percent body weight gain of larvae was influenced significantly
(P<0.05) by stocking densities and highest performance was observed
in fish stocked at 10 nos/I. The percent survival of larvae decreased significantly
with increase of stocking density and the rate of survival was similar
among 6nos/I - 10 nos/I groups. The loss of larvae was observed due to cannibalism
during rearing. The lowest stocking density resulted in least cannibalism.
Systematic approach and some anatomical feature of W. attu larvae are beleived
to be helpful for predation during rearing.

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Author Biographies

  • S K Sahoo, Central Institute of Freshwater Aquaculture, Kausalyaganga, Bhubaneswar - 751 002, Orissa, India
    Central Institute of Freshwater Aquaculture, Kausalyaganga,
    Bhubaneswar - 751 002, Orissa, India
  • S S Giri, Central Institute of Freshwater Aquaculture, Kausalyaganga, Bhubaneswar - 751 002, Orissa, India
    Central Institute of Freshwater Aquaculture, Kausalyaganga,
    Bhubaneswar - 751 002, Orissa, India
  • A K Sahu, Central Institute of Freshwater Aquaculture, Kausalyaganga, Bhubaneswar - 751 002, Orissa, India
    Central Institute of Freshwater Aquaculture, Kausalyaganga,
    Bhubaneswar - 751 002, Orissa, India

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Issue

Vol. 49 No. 2 (2002)

Section

Articles

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The copyright of the articles published in Indian Journal of Fisheries vests with the Indian Council of Agricultural Research, who has the right to enter into any agreement with any organization in India or abroad engaged in reprography, photocopying, storage and dissemination of information contained in these journals. The Council has no objection in using the material, provided the information is being utilized for academic purpose but not for commercial use. Due credit line should be given to the ICAR where information will be utilized.

How to Cite

Sahoo, S. K., Giri, S. S., & Sahu, A. K. (2011). Cannibalism, a cause of high mortality in Wallago attu (Schneider) larvae. Indian Journal of Fisheries, 49(2), 173-177. https://epubs.icar.org.in/index.php/IJF/article/view/8328