Bacterial and Heavy Metals Analyses in Fish at Shawaka Area of Tigris River
Abstract
This study was conducted from October to December 2012. 35 fish were collected from the Shawaka area of the Tigris river for quality analyses using bacteriological and chemical parameters. Results of bacteriological analysis showed that the total viable bacteria count in the fish gut, skin and gill were ranged from 35.35×103 - 6×103 cfu/g, 34.9×103 -21×103 cfu/g and 30.1×103 - 1.9×103 cfu/g respectiveluy. 151 bacterial isolates were obtained and identified into 14 genera (13 Gram negative bacteria + one Gram positive bacteria). The predominant bacteria from different organs were Staphylococcus spp., E. coli, Proteus spp., Citrobacter spp., Enterobacter spp. respectively. The results of study indicated that most fish samples were polluted with high levels of heavy metal Pb, Cd and Hg. Concentration of these heavy metals exceed limits for the fish recommended by the World Health Organization (WHO) and the Centre for Environment, Fisheries and Aquaculture Science (CEFAS).
Key word: Tigris river, Fish, Bacteria, Heavy Metals
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ISSN (Paper)2224-3224 ISSN (Online)2225-0956
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