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Pakistan Journal of Biological Sciences

Year: 2004 | Volume: 7 | Issue: 3 | Page No.: 305-308
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Research Article

Effect of Some Water Pollutants on the Biology of the Nile Bolti, Oreochromis niloticus

K.K. Barakat

ABSTRACT

Samples of water and Oreochromis niloticus fish were collected from El-Mahmoudya channel near Alexandria for contaminants determination. The data show that El Mahmoudya channel water includes relatively high levels of Fe, Cu and chlordane and much higher levels of Zn and lindane. Most of the dissolved, metals and organic contaminants or their metabolites were monitored in the fish and then eggs. The above pollutants were found to affect spawning behaviour and duration. The average number of eggs per spawn were higher in the control groups than the contaminated ones. The residue levels monitored in the eggs affected the fry survival of the Nile fish.
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