الفهرس Only 14 pages are availabe for public view
 |  | from | 155 |  |  |
| | | from | 155 | | |
Abstract
The present study was planned to investigate the following aspects :
1-the biological study of oreochromis niloticus
2- estimation of the population parameters ,yield per recruit.
3- the heavy metal concentrations in water of the studied areas as well as their presence