Fish Gills as Morphological Indicators of Exposure to Four Environmentally Relevant Pharmaceuticals
Oluwatosin Modupe, Olarinmoye, Badmos Lateef A.
Asian Journal of Fisheries and Aquatic Research · pp. 1–6 · Published 18 Apr 2023
10.9734/ajfar/2023/v22i2565Abstract
Pharmaceuticals are a fast-emerging class of environmentally relevant contaminants of concern, due to their ubiquitous presence in surfaces waters consequent on human and veterinary use. Their relatively unknown effects on non-target organisms and probable deleterious effects on ecosystem health and complexity make it necessary to develop the use of simple early warning detection systems to validate their probable presences in the aquatic environmental niche.. In this paper, we present the results of the effects on the gills of a local farmed catfish species, Clarias gariepinus of four pharmaceuticals detected in the Lagos lagoon at concentrations exceeding determined no observed effect concentrations (noec) in literature. Histopathological changes observed included lamellar hyperplasia, hypertrophy, epithelial lifting, necrosis and atrophy. This study validates the continuing histological utility of fish gills as sensitive indicators of exposure to xenobiotics, and the inherent capacity of pharmaceutical residues in water to elicit detectable pathologies in various fish organs, even at extremely low concentrations.
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