Effect of Crowding Stress on Some Physiological Functions of Nile Tilapia, Oreochromis niloticus (L.) Fed Different Dietary Protein Levels

Mohsen Abdel- Tawwab, Mamdouh A. A. Mousa, Safaa M. Sharaf and Mohammad H. Ahmad

International Journal of Zoological Research 1 ( 1 ): 41 - 47 , 2005