الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
The molluscan fishery was not well organized along the Egyptian coasts; they were exploited in large quantities by traditional methods and sold live or salted in the market for human consumption. The bivalves were rich in nutrients, particularly proteins, fats and minerals (CSIR 1962a and b). They tend to thrive in shelter marine environments, frequently near shore, where nutrient levels were high; thus there was a strong possibility that the live animals may be contaminated with sewage derived pathogens as well as those from the general environment (heavy metals, hydrocarbons and pesticides) (EL-Shenawy, 2004 and EL-Shenawy, et al., 2009). Moreover, the fact that they were filter feeders and good indicators for monitoring the pollution in the surrounding environment. They extract the contaminants with the extracting oxygen and food and accumulate them in their bodies much higher than in the surrounding sea water (Farag et al., 2000; EL-Gamal and Sharshar, 2004; Hamed and Emara, 2006).