الفهرس 
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Abstract
The present study aimed to evaluate the effect of the dietary fermented extracted
from Saccharomyces cerevisiae (nucleotides, beta- glucans) ”Hilyses” on the seed
production and health of Nile tilapia (Oreochromis niloticus) broodstock as well
as on seed survival and growth performance.
The trial was performed in a hatchery during the spawning season and
continued in the laboratory to monitor the growth performance in fry and
fingerlings.
Two groups of broodstock were distributed in 22 tanks (3x8x1 m), with 40
females and 16 males/tank. The fish were fed two levels of Hilyses (0.4% and
0%) during the spawning season from March until August.