Identification of Arctic Food Fish Species for Anthropogenic Contaminant Testing Using Geography and Genetics
| Autor: | Peiwen Li, Stephan Schott, Kristy Moniz, Iris Koch, Virginia K. Walker, Stephen C. Lougheed, Pranab Das, James Qitsualik |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Health (social science)
mercury lake trout Population Fishing Plant Science 010501 environmental sciences lcsh:Chemical technology 01 natural sciences Health Professions (miscellaneous) Microbiology Article 03 medical and health sciences Arctic char Sea ice lcsh:TP1-1185 14. Life underwater PCBs education 030304 developmental biology 0105 earth and related environmental sciences 0303 health sciences Fish migration education.field_of_study geography.geographical_feature_category biology lake whitefish arsenic biology.organism_classification Fishery Trout Congener Geography Arctic 13. Climate action genomic analysis geographic locations Food Science |
| Zdroj: | Foods, Vol 9, Iss 1824, p 1824 (2020) Foods Volume 9 Issue 12 |
| ISSN: | 2304-8158 |
| Popis: | The identification of food fish bearing anthropogenic contaminants is one of many priorities for Indigenous peoples living in the Arctic. Mercury (Hg), arsenic (As), and persistent organic pollutants including polychlorinated biphenyls (PCBs) are of concern, and these are reported, in some cases for the first time, for fish sampled in and around King William Island, located in Nunavut, Canada. More than 500 salmonids, comprising Arctic char, lake trout, lake whitefish, and ciscoes, were assayed for contaminants. The studied species are anadromous, migrating to the ocean to feed in the summers and returning to freshwater before sea ice formation in the autumn. Assessments of muscle Hg levels in salmonids from fishing sites on King William Island showed generally higher levels than from mainland sites, with mean concentrations generally below guidelines, except for lake trout. In contrast, mainland fish showed higher means for As, including non-toxic arsenobetaine, than island fish. Lake trout were highest in As and PCB levels, with salmonid PCB congener analysis showing signatures consistent with the legacy of cold-war distant early warning stations. After DNA-profiling, only 4&ndash 32 Arctic char single nucleotide polymorphisms were needed for successful population assignment. These results support our objective to demonstrate that genomic tools could facilitate efficient and cost-effective cluster assignment for contaminant analysis during ocean residency. We further suggest that routine pollutant testing during the current period of dramatic climate change would be helpful to safeguard the wellbeing of Inuit who depend on these fish as a staple input to their diet. Moreover, this strategy should be applicable elsewhere. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|