الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 101 |  |  |
| | | from | 101 | | |
Abstract
The present study was conducted in Shakshouk Fish Research
Station, Fayoum Governorate, National Institute of Oceanography and
Fisheries (NIOF), Egypt. A 93 days experimental period in 2019 by using
5 treatment of Red tilapia ponds (10 fish/pond). A ponds were consumed
the same artificial diets (27% CP). 1 cm/m3
from each treatment was
added at the beginning and repeated every month to ponds. The control
treatment was, Yeasts, Bacillus sp., Pseudomonas sp. and lactic acid
bacteria. The results revealed that survival rate was insignificant, but
lower than normal 72.2–83.3 %. The highest final weights of red tilapia
(P0.05) were recorded with Pseudomonas sp. treatment and the lowest
was the recorded with control group. Weight gain, daily gain and specific
growth rate was recorded a significant effects, where the best treatments
was found with Bacillus sp., Significant differences (P0.05) were
obtained in all feed utilization, except the feed intake. The best FCR
(lowest) was recorded with lactic acid treatments. The worst FCR was
recorded with control group. Heavy metal concentration analysis in
water showed the less values with yeast treatment, Bacillus sp., and lactic
acid bacteria and these treatments appears improvement on growth
performance and feed utilization. Ammonia and nitrite was shown the
lowest values with the pond treated with Bacillus sp., but the higher
values of ammonia was recorded significant effects with yeast treatment.
With Kidney and liver functions showed the lowest values with control
group, but higher with yeast treatments.