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Volume 9 October 2004
ISSN 1438-7890
 
African Journal of Environmental Assessment and Management
Revue africaine de gestion et d’évaluation environnementales
 

DISTRIBUTION OF HYDROCARBONS AND HEAVY METALS IN SEDIMENT AND A CRUSTACEAN (shrimps Penaeus notialis) FROM THE BONNY/NEW CALABAR RIVER ESTUARY, NIGER DELTA

 

Alex Chuks Chindah, Amabaraye Solomon Braide and Onyebuchi Cordelia Sibeudu

 
Levels of hydrocarbons and heavy metals in sediment and a crustacean (Shrimp Penaeus notialis) along Bonny/New Calabar River Estuary were studied to cover the two dominant (wet -September 2000 and dry - January 2001) seasons, in ten selected stations located in 3 main ecological zones along the Bonny / New Calabar river estuary which lies between longitude 7o 00 to 7o 15 E and latitude 4o 25 to 4o 45N. Samples were collected and analyzed using appropriate tools and methods. The results obtained showed the distribution of total hydrocarbon concentration for sediment and Shrimp Penaeus notialis  body tissue for the three ecological zones a consistent longitudinal sequence of Upper > lower > middle for wet and dry seasons respectively. In addition, both sediment and organism (Shrimp Penaeus notialis) had total hydrocarbon and metal (Cr, Cd, V and Pb) concentrations that demonstrated seasonal differences with significant higher values in wet than in the dry season, except Zn and Cu that showed a contrary pattern. Furthermore, indications of hydrocarbon and metal bioaccumulation in organisms were observed. The possible source of total hydrocarbon and metals in the body tissue of the Shrimp Penaeus notialis was highlighted by this study.
 
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