Organochlorine pollutants level in fish from Mariut lake, Alexandria, Egypt

The residues of twenty-five organochlorine pollutants as well as three aroclors were analyzed by capillary GLC in two Tillipia fish species and Cyprinus carpio collected from Mariut Lake, Alexandria, Egypt. The studied pollutants were DDT's isomers, hexachlorocyclohexane [HCHS] isomers as well as cyclodiene compounds, mirex, methoxychlor, toxaphene and hexachlorobenzene [HCH], aroclors 1248, 1254 and 1260 in addition to nine individual PCBs congeners. Lindane dominated the alphaisomer of HCHS. P,p'-DDE dominated other DDTs analogs in all fish samples with maximum concentration 25.0 ng/g in Cyprinus carpio. Toxaphene was detected in all fish samples with a maximum level of 29.0 ng/g in Cyprinus carpio. Aroclor 1248 dominated other aroclors in all fish samples. For PCBs 153, congener dominated other congeners. The lower chlorinated biphenyls congeners occurred at lower levels except PCB 200 which was not detected

The occurrence of Lindane in some Egyptian water and its effects on swimming performance of carp fish cyprinus carpio

Residues of lindane were analyzed by capillary gas chromatography in water from different investigated areas. Variations were observed in the levels of lindane with the highest concentration at Rossetta Branch followed by Damietta Branch, Maryut Lake and Idku Lake. The median lethal concentration of lindane after 24 hours and 96 hours were 42 and 25.8 mug/l, respectively. The residues level of lindane from different investigated areas as well as its effects on fish swimming performance have been studied. Lindane was found to affect significantly fish swimming performance. It is suggested that lindane may influence the exchange of respiratory gases or the metabolic pathways involved in the mobilization of energy