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- Title
COMPARATIVE ASSESSMENT OF HEAVY METAL LEVELS IN CRABS, PERIWINKLES AND OYSTERS OBTAINED FROM EYAA CREEK, UPPER BONNY ESTUARY, ONNE, NIGERIA.
- Authors
MOSLEN, M.; PUANONI, N. I.; BARILE, L. B.; NWIDEA, M.; NWIKOORI, J.
- Abstract
This study examined heavy metals in some aquatic organisms [crabs (Callinectes amnicola), periwinkles (Tympanotonus fuscatus) and oysters (Crassostrea gasar)] from Eyaa Creek, Onne, in southern Nigeria. Samples were collected from four stations monthly for three months. Characterization of the environment was via physico-chemical properties, while heavy metal analysis was by Atomic Absorption Spectrometry. Physico-chemistry results indicated: temperature; 30.2 - 30.7oC; pH: 6.7 - 6.8; dissolved oxygen: 6.1 - 6.3 mg/l; electrical conductivity: 18.8 - 20. 8 mS/cm; total dissolved solids: 4698.5 - 6212.0 mg/l; salinity: 11.1 - 12.4 PSU and turbidity: 3.7 - 4.7 NTU. ANOVA showed insignificant difference (p>0.05) between stations indicating homogeneity of the area assessed. Mean metal concentrations (mg/kg) in the organisms were cadmium: 0.18 ± 0.09 - 0.60 ± 0.08; chromium: 0.41 ± 0.14 - 0.78 ± 0.08; iron: 12.1 ± 6.9 - 20.2 ± 7.7; lead: 0.31 ± 0.2 - 0.91 ± 0.05. Chromium and lead values were above permissible values of FAO/WHO and EU but cadmium fell within and above the limits. Principal component analysis did not show a clear pattern with organisms' feeding habit but discriminated based on metal concentrations. In conclusion metal concentration in periwinkles>crabs>oysters which was related to their feeding habits in terms of sediment and pelagic affiliations.
- Subjects
NIGERIA; HEAVY metals; ANALYSIS of heavy metals; OYSTERS; CRABS; PRINCIPAL components analysis
- Publication
Journal of Aquatic Sciences, 2024, Vol 38, Issue 2, p185
- ISSN
1115-2788
- Publication type
Article
- DOI
10.4314.jas.v38i2.15