Seasonal variation of polycyclic aromatic hydrocarbon metabolites in bile of white perch Morone americana from two Chesapeake Bay tributaries
Autor: | Erin L. Pulster, Mark A. Matsche |
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Rok vydání: | 2021 |
Předmět: |
Metabolite
Polycyclic aromatic hydrocarbon Aquatic Science chemistry.chemical_compound Motor boat Morone americana Tributary Animals Bile Polycyclic Aromatic Hydrocarbons Ecology Evolution Behavior and Systematics Pah metabolism chemistry.chemical_classification Perch geography geography.geographical_feature_category biology Chesapeake bay biology.organism_classification Bays chemistry Environmental chemistry Bass Seasons Water Pollutants Chemical Environmental Monitoring |
Zdroj: | Diseases of Aquatic Organisms. 147:63-86 |
ISSN: | 1616-1580 0177-5103 |
Popis: | Polycyclic aromatic hydrocarbon (PAH) accumulation in the bile is a reliable biomarker of recent exposure to environmental PAH and elevated concentrations have been identified as significant risk factors for hepatic disease in some fish species. Recent surveys (spring 2019) revealed a high incidence of hepatic lesions in white perch Morone americana from Chesapeake Bay, but this initial survey did not detect an association between PAH metabolites and lesions. Seasonal sampling of fish was extended through the winter 2020 to increase the metabolite and hepatic lesion database and better understand annual PAH exposures to white perch. Naphthalenes, phenanthrenes, and benzo[a]pyrenes (equivalents) were analyzed in bile specimens (n = 400) using high-performance liquid chromatography with fluorescence detection. Mean concentrations of metabolites were highest in fish collected from the urbanized Severn River in summer and were lowest in fish from the more rural Choptank River in winter. Variance in metabolite concentrations were primarily due to location and season. Seasonal fluctuations in water temperature, river discharge, or feeding status had little influence on the pattern of metabolite concentrations observed. The results suggest higher exposures of fish to environmental PAH in the more developed Severn River with significant increases during summer, which could correspond to a spike in seasonal recreational motor boat use or other human activities. A better understanding of the factors that contribute to variability in PAH metabolism and the enterohepatic biliary circulation in white perch will improve the usefulness of biliary metabolites as a biomarker of PAH exposure in Chesapeake Bay and elsewhere. |
Databáze: | OpenAIRE |
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