Study on heavy metals in freshwater cray fish populations in Egypt (Procambarus clarkii) [electronic resource].

Includes reference.

Crayfish are freshwater crustacean that look like a tiny lobster, freshwater crayfish (Procambarus clarkii) had been introduced accidentally and appear in the River Nile and its resource all over Egypt during the last years. The objectively this study to evaluate the typical point source pattern, with the highest levels of heavy metals. Total hundred and fifty (150) Crayfish samples were collected from different farms and lakes of Alexandria and Behera governorates. The samples were subjected to ash, minerals and some trace and heavy metals (Using atomic absorption spectrophotometer) were determined. This investigation showed that the highest levels of trace and heavy metals recovered from the Crayfish exoskeleton, hindgut and hemolymph. Manganese, lead and copper levels were as high as 35.176, 1.948 and 3.721 μg/g, respectively. Zinc and Cadmium were the most abundant of the detected heavy metal contaminants with values on the order of 64.732 and 6.37 μg/g. Chromium and Nikle values followed similarly with values as high as 3.68 and 3.12 μg/g wet weight. Minerals concentrations level were 1.32 %, 506.33 and 415.63 μg/g for phosphorous, iron and magnesium respectively.

Summary in Arabic.

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