الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Feeding Nile tilapia fry (9 g initial body weight) on aflatoxin B1 (AFB1)contaminated diets (5002000 ppb) led to external (lethargyscales lossbody weight lossmucushemorrhage and discoloration) and internal (infiltration and irregular hepatic structure) symptoms. It deteriorated the body weight, growth rates, feed conversion and survival rate. Moreover Biogen(R* (Baddition (2 and 4 g/kg diet) did not significantly alter the negative effects of AFB1, but even Biogen(R* (Blowered significantly the feed efficiency. The AFB1 contamination reduced significantly the protein percentage in the fish flesh as well as all nutrients utilization. It tended to elevate significantly fish flesh contents of fats and ash. Yet, Biogen(R* (Bled to the opposite trend (increased protein and decreased fat and ash contents of the fish flesh). The blood profile was negatively affected by the dietary AFB1 inclusion, since it reduced packed cell volume, hemoglobin and total protein in blood, but increased muscular content of RNA. Biogen(R* (Bsignificantly reduced more blood hemoglobin and reduced muscular content of DNA. Hence, AFB1contamination of fish diets is a danger threats the fish wealth (and perhaps also the consumer). Trying its detoxification by Biogen(R* (Bsupplementation was not useful. Therefore, it is emphasized to hygienic control of aquafeeds and their ingredients (whether in their choice or storage) to avoid their fungal invasion by toxigenic fungi. Since prophylaxis is more useful than medication.