What is it about?

Polycyclic aromatic hydrocarbons (PAHs) are priority pollutants that are major constituents of petroleum. Their occurrence in the aquatic environment emanates from petroleum-related processing and wastewater. Their effects have been studied in various aquatic organisms. However, there is a scarcity of studies on sex-specific responses of model aquatic organisms to these ubiquitous pollutants. We utilised multiple biological endpoints to evaluate the responses of male and female sexually mature African Sharptooth Catfish to near environmental concentrations of 2-ringed (Naphthalene), 3-ringed (Phenanthrene) and 4-ringed (Pyrene) PAHs.

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Why is it important?

Our results demonstrate sex-specific responses and the utility of multiple biological responses across various levels of biological organisation for holistic evaluations of polycyclic aromatic hydrocarbons in ecotoxicological studies.


This article was part of the studies culled from my doctoral research and has spurred my interests in studying the effects of pollutants on early life stages of fish. I hope this article inspires your interest in the field of aquatic toxicology.

Dr. Temitope O. Sogbanmu
University of Lagos

Read the Original

This page is a summary of: Biomarkers of toxicity in Clarias gariepinus exposed to sublethal concentrations of polycyclic aromatic hydrocarbons, African Journal of Aquatic Science, August 2018, Taylor & Francis,
DOI: 10.2989/16085914.2018.1491825.
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