STUDIES ON SAPROLEGNIOSIS IN CULTURED TILAPIA
Mona Mahmoud Ismail;
Abstract
The present work was conducted for studying saprolegniosis in cultured Nile tilapia Oreochromis niloticus as Saprolegnia play an important role as a pathogenic agent acting as a secondary or even a primary invadors.
This study was carried out on four hundred fish samples from Abbassa Fish Hatchery Sharkia (200 fish) and Fish Research Center at Suez Canal University (200 fish) from the period of March 1997 to February 1998. The results of these studies are summarized asfollows:
• The clinical examination of naturally infected Oreochromis niloticus were characterized by conspicuous fungal colonies growing on the mouth, eye, gill, gill cover, body surface and fins. The fungal growths appeared as white or discoloured cotton wool like. The early lesions appeared almost circular, pale with peripheral areas of erythema and the scales were left away from the body wall leaving areas of necrosis. Eye infection causing blindness offish were also observed. The blind fish were erratic in direction and swam at sides of the aquaria. Fish with body surface and fin infection revealed more slow swimming less response to external stimuli. Fish with gill infection swam to the surface of the water for gulbing air with loss of equilibrium often occur as shortly before death.
This study was carried out on four hundred fish samples from Abbassa Fish Hatchery Sharkia (200 fish) and Fish Research Center at Suez Canal University (200 fish) from the period of March 1997 to February 1998. The results of these studies are summarized asfollows:
• The clinical examination of naturally infected Oreochromis niloticus were characterized by conspicuous fungal colonies growing on the mouth, eye, gill, gill cover, body surface and fins. The fungal growths appeared as white or discoloured cotton wool like. The early lesions appeared almost circular, pale with peripheral areas of erythema and the scales were left away from the body wall leaving areas of necrosis. Eye infection causing blindness offish were also observed. The blind fish were erratic in direction and swam at sides of the aquaria. Fish with body surface and fin infection revealed more slow swimming less response to external stimuli. Fish with gill infection swam to the surface of the water for gulbing air with loss of equilibrium often occur as shortly before death.
Other data
| Title | STUDIES ON SAPROLEGNIOSIS IN CULTURED TILAPIA | Other Titles | دراسات عن مرض السابروليجنيا فى أسماك البلطى المستزرعة | Authors | Mona Mahmoud Ismail | Issue Date | 1998 |
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