Working Document Series Open Access 2010 RUF-35086

Development of least cost formulated feed for Tilapia rendalli in tank based grow- out culture system

J. Kang’ombeT. Soko

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Abstract

170 words

An experiment was conducted at Bunda fish farm from November 2009 to February 2010. Juveniles of Tillapia rendalli of average weight 9.5 ± SD 0.5g were stocked in outdoor concrete tanks and fed on diets of different plant protein sources formulated at different crude protein (CP) levels. The results indicated that fish treatments had significant effect on growth and survival. Fish fed on Diet 1 had an average final weight 25.64±0.79g, Diet 2 had final average weight of 23.31±0.71g, Diet 3 had final average weight of 21.71 ±0.80g and Diet 4 had an average final weight of 23.00±1.12g and differed significantly among treatments. Survival of the fish was highest in Treatments 2 and 3 which were 85.5% and 85.6%, respectively. Treatments 1 and 4 had low survival rates of 77.8 and 60%, respectively. This study established a potential of using a combination of local plant protein sources which was relatively cheap, readily available and easily accessible to make least cost feed for tilapia species in tank based grow out system.

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