Utilization of different levels of mono, di and polysaccharides on growth performance of nile Tilapia oreochromis nilotcus.

Abstract

The present work was carried out in Fish Research laboratory, Kafr Elsheikh, Faculty of Agriculture, Tanta university to study the effect of different kinds and levels of carbohydrate on growth performance, carcass chemical composition and efficiency of feed and protein utilization of Nile Tilapia fingerlings. The experimental system consisted of ( 18) glass aquaria (80 x 32 x 40 em) with about (80 liters) of water in each. All aquaria were supplied with compressed air through air compressor ( 100 liters). One third of the total water volume in each aquarium was replaced by fresh tap water after cleaning and removing the accumulated excreta. Water temperature was controlled

thermostatically at 25 ± 1 c by electric heaters.

Eight isonitrogenous diets (30% protein) were formulated from fish meal as a source of protein and semi purified ingredients. Different types o( carbohydrate (glucose, sucrose, dextrin

and starch) were incorporated in the diets at two levels (30 and

40%). Control diet included cellulose as a sole source of carbohydrate. the experimental diets were introduced to the fish at (3%) from the total live body weight in duplicate (2 groups I diet). A set of (180) Nile Tilapia fingerlings (Oreochromis niloticus) with about 12 ± I g average initial body weight were used in this study. The fish were distributed in glass aquaria with (10) fish in each. The experiment was continued for (98) days.