The speciation of arsenic in the muscle tissue of inland and coastal freshwater fish from a remote boreal region
| Autor: | Gretchen L. Lescord, Thomas A. Johnston, Dominic E. Ponton, Marc Amyot, Alan Lock, John M. Gunn |
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| Rok vydání: | 2022 |
| Předmět: |
Ontario
History Environmental Engineering Polymers and Plastics Health Toxicology and Mutagenesis Muscles Public Health Environmental and Occupational Health Fishes General Medicine General Chemistry Pollution Industrial and Manufacturing Engineering Arsenicals Arsenic Lakes Arsenic Poisoning Environmental Chemistry Animals Cacodylic Acid Humans Business and International Management |
| Zdroj: | Chemosphere. 308(Pt 1) |
| ISSN: | 1879-1298 |
| Popis: | Elevated concentrations of total arsenic (As) have been reported in boreal freshwater fish in both human-impacted and relatively pristine areas. We assessed the arsenic speciation profiles in muscle tissue of six fish species (n = 300) sampled from nine locations across a remote freshwater watershed in northern Ontario, Canada, extending from inland headwater lakes to the coastal marine confluence. Of the five arsenic species measured, only arsenobetaine (AsB) and dimethylarsinic acid (DMA) were detected in these fish. Riverine fish had up to 10-fold higher total [As] when compared to lacustrine fish. On average, these riverine fish also had higher percentages of AsB (%AsB, 60 ± 26%) and lower percentages of unmeasured arsenic (%UNM, 20 ± 21%), compared to lacustrine fish (28 ± 18% and 52 ± 21% %AsB and %UNM, respectively). DMA percentages (%DMA) were relatively consistent across the watershed, averaging 20 ± 21% across all fish. We examined ecological drivers of As speciation and found that %AsB increased slightly with fish weight in large-body predatory fish, but not in forage fish or insectivores. Furthermore, %AsB was positively related to trophic elevation (inferred from δ |
| Databáze: | OpenAIRE |
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