EFFECT OF CONTRA/INSECT 500150 E.C ON THE HISTOPATHOLOGY OF OREOCHROMIS SPILURUS FISH

EFFECT OF CONTRA/INSECT 500150 E.C ON THE HISTOPATHOLOGY

OF OREOCHROMIS SPILURUS FISH

BY

FATMA.A. ELNEMAKI AiVD OSAMA.A. ABUZINADAH.

King Abdulaziz Univesity. Faculty ofScience, Department ofBiological ScienceKingdom ofSaudi Arabia,

Jeddah

ABSTRACT
The present study is one of the serial studies dealt with the toxicity
problems in the water environment that caused by compound type of
pesticides. The impacts of one of these pesticides were examined on fish,
which is considered one ofthe most important sources ofanimal pretein. The
present study investigates the effect of the Conrta/lnsect 500/50 E.C.toxicity
(one of the compound pesticides) on pesticidal histopathology of the gill,
muscle, heart, and gonads ofOrechromis spilurus fish.
Healthy fish were exposed to the sub lethal concentrations 0.015(1),
0.035(2), and 0.070(3) mg/l, of the contra/insect pesticide. Fish specimens
were taken from each concentrations after 24, 72, 120 and 168 hours ofpost
exposure time. Tissues were prepared and histologically examined by
standard methods. The results ofthis study showed necrosis, myolysis, lesion,
and hemorrhage in most of the examined tissues as a result ofthe pesticide
toxicity.