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Abstract
Letter aims to shed light on the lasting impact of poisoning Almlatheon some freshwater fish and through the study were the factors affecting the toxicity of Almlatheon as well as the study of biodegradation of the pesticide in Almlatheon Onsjpalosmak and also to examine the response of some tissues of the enzyme Almlaithon and pesticide toxicity has also been studying the use of toxic Almlatheok (RET) and through the study found that male tilapia Egyptian Mlatheon for less absorption when compared to the mixed group of the same type, which was subjected to the same focus and also proved to be effective Almlatheon depends on its focus in the center, regardless of the duration of exposure of fish Mlatheon.