Cannibalism, a cause of high mortality in Wallago attu (Schneider) larvae
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Abstract
A study was conducted to find the effect of stocking density on bio-growth, specificgrowth 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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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