EFFECT OF USING BETAFIN ANDIOR BIOPOLYM AS NATURAL ADDITIVES IN PRODUCING NILE TILAPIA FISH IN POLY-CUL lURE SEMI-INTENSIVE SYSTEM IN EARTHEN PONDS

Document Type : Original Article

Authors

1 Animal Production Department, Faculty of Agriculture, Mansoura University, Mansoura, Egypt.

2 Cent. Lab. for Fish Researchs, Abbasa, Abo-Hammad, Ministry of Agriculture, Egypt.

Abstract

In a study on cultivation of Nile tilapia in earthen ponds (each of 1 faddan
area) under poly-culture semi-intensive system, betsfin was added 10 diet offered to
1!1 pond (1 Kgflon), 2as! pond (2 Kgfton) and 3~ pond (1 Kg besides biopolym 600
ml/ton). Biopolym was added to diet of 4!l! pond (600 milton) but sprayed on 5!l!
pond's water (1500 ml then 600 ml each 2 weeks). The 61ll pond was a control.
without additives. The experimental duration was 6 months. The ~ pond gave the
best results, i.e. the highest average body weight. total and daily body gains, growth
rates (relative and specific), total productivity (10.675 tonlfaddan), muscular protein %,
radius of the muscular bundles, total surface area occupied by the muscular
bundles/mm2 (Ihe least thickness of connective tissues between muscular bundles
and thickness of skin and subcutaneous layer), and highest net return (21.970
thousand LElfaddan).

Keywords

Journal of Animal and Poultry Production
Volume 29, Issue 6
June 2004
Pages 3149-3162

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