Survey and Distribution of Pesticides and Metals in Karmout fish, Clarias lazara collected from Kalubia Governorate, Egypt.

Abstract

Existence and organ distribution of some pesticide residues and heavy metals in muscle and visceral samples of Karmout fish, Clarias lazera collected from different markets locates at Kalubia governorate, Egypt were investigated during the period of April 1999 to March 2000. Data indicate the detection of different amounts of pesticide residues and heavy metals in fish samples according to the sampling site and season. Fish samples from El-Esmailia and EI-Sharkawia markets were found contained the lowest levels of pesticide residues within the 1st five months. The other sites showed different trend of residues as amounts and types. As for residues distribution in fish organ, data indicate that the majority of pesticide residues was detected in the visceral tissues compared with muscles. Most of the analyzed muscles samples were found free of residues or contained low and/or non detected levels. It is clearly evident to notice that the detected residues in fish tissues were found in amounts almost within the permissible levels. Generally, both of location and season factors played role in this respect Also, some metals were detected in all samples of fish in a very minute amount.