Asian Fisheries Society

A Preliminary Study on Nile Tilapia (Oreochromis niloticus) Ployculture with Common Carp (Cyprinus carpio) Fed with Duckweed (Spirodela) in Nepal


Mixed-sex Nila Tilapia (Oreochromis niloticus) and common carp (Cyprinus carpio) were cultured in four cement ponds of 72 m2 at 1:1 ratio with a stocking density of 1 fish•m-2 during summer in subtropical Nepal. Fish were fed with locally collected duckweed (Spirodela sp.) during 108 days of experimental period. Nile tilapia grew from 39.6±3.7 g at stocking to 145±5.2 g at harvesting with a survival rate of 90±4 %. Common carp grew from an initial 2.8±0.6 g to final 63.2±2.4 g with 97±1 % survival rate. The extrapolated annual yield of stocked fish ranged from 2.3 – 2.9 t•ha-1 with a mean of 2.5±0.1 t•ha-1. Tilapia offsprings produced during the experimental period was 1690±261 fish per pond with an average size of 7.2±1.6 g. Weight of tilapia recruits obtained was two times more than that of the net yield of originally stocked fish. The common carp did not control tilapia recruitments.

Publication Date : 1999-05-01

Volume : 12

Issue : 1

Page : 83-89

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Date 1999/05/01
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