Abstract
An assessment of the pollution status of Agboyi creek, a water body associated with various anthropogenic activities was carried out in order to determine responses induced in Catfishes, Chrysichthys nigrodigitatus inhabiting it. Cellular biomarkers of stress including the antioxidative stress enzyme, catalase (CAT), lipid peroxidation measured as thiobarbituric acid reactive substance (TBARS), as well as serum enzymes alanine aminotransferase (ALT) and Aspartate aminotransferase (AST) were evaluated in C. nigrodigitatus from Agboyi creek and compared to a control (non-polluted) water body, Epe Lagoon. The results of physicochemical assessments of both water bodies showed significant differences (P<0.05) with Agboyi creek having high levels of total suspended solids (TSS), phosphate as well as total dissolved solids (TDS) and heavy metal concentrations which exceeded National Environmental Regulations (NESREA) safe limits. The mean concentration (Mean ± SD) of TBARS in the liver of C. nigrodigitatus at Agboyi Creek (2455.43 ± 1440.0 nmol/mg protein) was about twice the levels at Epe Lagoon (1398.31 ± 1446.50 nmol/mg protein). Inhibition of CAT activity was observed in liver samples of catfishes at Agboyi Creek (48.17 ± 60.23 µmol/min/mg protein) compared to Epe Lagoon (87.97 ± 13.00 µmol/min/mg protein). The mean activities of ALT and AST were significantly higher (P<0.05) at Agboyi Creek (12.67 ± 15.04 and 151.67 ± 76.76 U/L) compared to Epe Lagoon (2.33 ± 0.52 and 6.00 ± 3.46 U/L). The present study shows altered biochemical conditions in fishes sampled in the water body impacted by anthropogenic contaminants and suggest that those parameters could be used as reliable biomarkers of contaminant exposure to fish. Key words: Biomonitoring, water pollution, oxidative stress, fish health.
Highlights
The increase of population in coastal areas and the rise of our standard of living is driving the efforts to produce more food, thereby increasing domestic, agricultural and industrial activities
An assessment of the pollution status of Agboyi creek, a water body associated with various anthropogenic activities was carried out in order to determine responses induced in Catfishes, Chrysichthys nigrodigitatus inhabiting it
Cellular biomarkers of stress including the antioxidative stress enzyme, catalase (CAT), lipid peroxidation measured as thiobarbituric acid reactive substance (TBARS), as well as serum enzymes alanine aminotransferase (ALT) and Aspartate aminotransferase (AST) were evaluated in C. nigrodigitatus from Agboyi creek and compared to a control water body, Epe Lagoon
Summary
The increase of population in coastal areas and the rise of our standard of living is driving the efforts to produce more food, thereby increasing domestic, agricultural and industrial activities. Primary concerns are the effects of domestic and industrial effluents on the general health of aquatic life, the maintenance of hitherto viable artisanal commercial fisheries and the safety of humans occupationally exposed to the pollution (Ajao and Fagade, 1990). Apart from mortality, some of the more common and serious effects of environmental stressors on aquatic organisms are changes in behavior, growth, and reproduction (Walker et al, 2001)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
