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Turkish Journal of Veterinary & Animal Sciences

DOI

-

Abstract

In this study, the accumulation of lead in various tissues of Tilapia zilli was tested at varying concentrations of lead in the medium for different exposure times. Experimental animals were exposed to 1.0, 2.5 and 5.0 ppm lead over periods of 1, 7, 15 and 30 days and accumulation of lead in gill, liver, kidney and brain tissues was determined by atomic absorbtion spectrophotometry (AAS). In general, the accumulation of lead in tissues increased with increasing concentrations of lead in the experimental medium and with increasing time of experiment. The ratios of total lead in the tissues were 15.47, 6.10, 52.87 and 25.56% in the gill, liver, kidney and brain respectively (Kidney > Brain > Gill > Liver). The high level of lead accumulation in the kidney tissue may be explained by the fact that this tissue contains lead combaining proteins, and a high level of metal is disposed of with the aid of kidney tissue. Key Words: Lead, Tissue, Accumulation, Tilapia zilli

First Page

471

Last Page

477

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