Distribution of Some Heavy Metals in Tissues of Oreochrom1s Siloticus* Tilap1a Zjll11 and Clarias Lazera From Abu Za'baal Lakes and Their Impacts on Some Biochemical Parameters and on the Histological Structures of Some Organs

Abstract

A bu Za'baal Lakes are man-made lakes, formed by the fracture apd extract of rocks. The lakes, as other inland closed basins. receive their water from the ground and seepage waters. They consist of three lakes and another filling-phase lake. In the present study, the concentrations of some heavy metals {Fe. Zn. Mn. Pb. Cu and Cd) in water and organs (muscles, gills, liver and kidney) of O. niloticus. T, zillii and C. iazera collected from Abu Za'baai Lakes were measured during winter. 2004. The effects of the tested metals on the total protein and total lipid contents in the muscle and liver and on the histological structures of the gills. liver and kidneys of fish were studied.The present results showed that the levels of Fe. Zn. Mn. Pb. Cu and Cd in the water of Abu Za'baal lakes ranged between 3.22-6.0L 0.21-1.50. 0.67-1.64. 0.62-1.67. 0.13-0.20 and 0.03-0.06 mc/L respectively. The highest \ allies of metals were reported in the third lake, while their lowest values were in the first one.It was found that the metals were accumulated in different organs of the studied fish b> various levels. The concentration of the tested metals in different organs of (I niloticus and T zillii followed a sequence of: Fe. /n. Mn. Pb and Cd in muscles < gills < liver < kidnevs. however. Cu in muscles • uills < kidnevs < liver for (). nilolicus and in gills ■■ muscles ■ kidneys < liver for T. zillii. On the other hand, in C lazcra. Fe and Cu were in muscles < gills < kidneys < liver. Zn. Pb and Cd in muscles •' gills < liver --' kidneys and Mn in muscles < li\er -kidne\> gills. In general, the concentrations ol

Impact of Heavy Metals Pollution on Histopathological Alterations in Kidney and Liver of Nile Tilapia (Oreochromis Niloticus( Inhabiting El-Rahawy Drain

“…It was found that Fe concentration recorded higher accumulation in the muscle than the water during the winter season. Higher Fe content in muscle of O.niloticus can be attributed to the large quantities of Fe in water , this agree with the findings of Ghazaly et al (1992) , Tariq et al (1993 , Bahnasawy (2001) and Mohamed and Gad (2005). Iron concentrations in the water and muscle of fish is more than the maximum permissible level for Fe (5.0mg/g) cited by Abeyede (1993).…”

Impact of seasonal changes on the quality of water and fish from Abu Za’baal Lakes.

“…The results indicated that the present level of the examined heavy metals in water and fish muscles from Abu Za'baal lakes did not exhibit any effect on proximate composition and physicochemical characteristics of fish muscles. This result is in agreement with (Abdo, 2006, Ibrahim et al, 2008& Mohamed and Gad 2005.…”

“…Generally, lipid content varies within species (1.46-5.77 g/100g) and is affected by the catching season (1.20-18.4 g/100g), (Osman, et al, 2001). Mohamed and Gad (2005) proved that, protein and lipid contents in the tissue of Oreochromis niloticus and Clarias lazera from Abu Za'baal lakes were (15.95-15.87) and (0.96-0.99) g/100 g wet weight, respectively. Osibona et al, (2006) found that Clarias gariepinus had mean protein content of 19.64%, lipid 1.15%, moisture 76.71% and ash 1.23%.…”

Age, growth and fishery biology of cichlid spp. in Abu-Zaabal Lakes,Egypt

“…Several studies have been carried out on these lakes and lights were thrown on morphometry and bathymetry (Abd-Ellah, 2003), physico-chemical characteristics (Abdo, 2005), pathological conditions of Tilapia zillii (El-Mansy, 2005), phytoplankton composition (Mohamed, 2005), metals accumulation in fish organs (Mohamed and Gad, 2005), microbiological status (Rabeh and Azab, 2006), zooplankton community (El-Basset and Taylor, 2007),biological, histological and quality aspects of fish (Ibrahim et al 2008), reproductive biology of O.niloticus, and feeding habits of O.niloticus (Shalloof and Khalifa, 2009). The objective of study was to provide and update information on the growth and feeding habits needed by cichlid species to flourish in these newly formed mining lakes.…”