الفهرس 
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Abstract
The present study was carried out at the department of fish nutrition, national institute of oceanography& fisheries alexandria branch, egypt to study;
1- Study the effect of artificial diets containing different dietary of commercial feed additives from prebiotics as chitosan and mos on growth, feed utilization, survival, intestinal histology and microbial contents of european sea bass (Dicentrarchus labrax) fry.