Evaluate of silkworm wastes on productive performance of nile tilapia (O. niloticus) fingerlings [electronic resource].

Includes references.

A thirteen week trial was conducted in ten cement ponds 3 m3 each to investigate the effect of applied silkworm wastes on productive performance and economic efficjency of Nile tilapia (Oreocl1romis niloticus) fingeriings. In this experiment duplicated five treatments were applied; (T1) applied weekly with Silkworm litter at rate of 50 g I m3, (T2) applied with waste mulbeny leaf at rate of 50 gl m3 every week, (T3) applied weekly with mixed of Silkworm litter and waste mulberry leaf at rate of 50 g / m3 , (T4.) applied weekly with rigirs at rate of 50 g / m3 and control (T5) fed daily with diet 25% protein at a rate of 70/0 of fish body weight 5 days a week. The averdge initial weights of Nile tilapia fingerlings were 1.3 g. Results indicated that T, surpassed all treatments and recorded higher (P< 0.05) final body weight, total weight gain and ADG than the treatment T. and non significant higher (P> 0.05) thanT" T3 and Ts. Followed by Ts (control), T1 and T3, respectively. There were no significant differences between treatments in SGR. With regard to economic efficiency, Ts recorded the highest total cost however; T, recorded the highest net return and economic efficiency. In condusion, the use of silkworm wastes especially waste mulberry leaf in fish pond culture could be recommended for Nile tilapia at a rate of 50g /m3/ week (210 kg/ feddan / week) with fish stocking density 20 fish/ m3 (84000 fingerlings/ feddan), especially with the high cost of fish diets and the problems found now for fresh poultry manure.

Summary in Arabic.

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