TY - JOUR AU - Lawal Are, AO AU - Moruf, RO AU - Sobara, UJ AU - Salami, KB PY - 2021/07/11 Y2 - 2024/03/28 TI - Relationship Between Mercury Concentration in Water, Bottom Sediment And Two Mollusc Species (Crassostrea Gasar and Tympanotonus Fuscatus) From a Lagos Creek in Nigeria JF - Journal of Bio-Science JA - J bio-sci. VL - 29 IS - SE - Articles DO - 10.3329/jbs.v29i0.54830 UR - https://www.banglajol.info/index.php/JBS/article/view/54830 SP - 143-151 AB - <p>Concentration of mercury was investigated in the flesh and shell of two species of benthic mollusc, <em>Crassostrea gasar </em>and <em>Tympanotonus fuscatus </em>and in water and sediment from Makoko Creek, adjacent to the Lagos Lagoon between January to September 2019. Values obtained for physicochemical parameters in Makoko Creek (water temperature- 28.92±0.1°C; pH- 7.73±0.02; salinity- 14.23±0.05 ppt; dissolved oxygen- 5.34±0.02 mg/l; biological oxygen demand- 7.780±0.1 mg/l and chemical oxygen demand- 12.34±0.02 mg/l) were within the acceptable levels for survival, metabolism and physiology of aquatic organism. The concentration of mercury followed decreasing order as sediment &gt;water &gt;flesh &gt;shell across locations for both species. For all the tested samples of <em>C. gasar </em>and <em>T. fuscatu</em>s, biowater accumulation factor in flesh and shell were higher than those of bio-sediment accumulation factor. The coefficients of variance (CV %) in shells were lower than those of the flesh for both investigated mollusc species. It was shown that mercury contents of flesh or shells of <em>C. gasar </em>and <em>T. fuscatu </em>are directly affected by those of water and bottom sediment.</p><p>J. Bio-Sci. 29(1): 143-151, 2021 (June)</p> ER -