Evidence for recent declines in PFASs and PBDEs in subsistence-harvested ice seals from Alaska.
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| Sprache: | en |
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Marine pollution bulletin
2026
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| _version_ | 1868266064376233985 |
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| author | Olnes, Justin Bryan, Anna Stimmelmayr, Raphaela Quakenbush, Lori |
| author_facet | Olnes, Justin Bryan, Anna Stimmelmayr, Raphaela Quakenbush, Lori Olnes, Justin Bryan, Anna Stimmelmayr, Raphaela Quakenbush, Lori |
| collection | PubMed - marine biology |
| contents | Evidence for recent declines in PFASs and PBDEs in subsistence-harvested ice seals from Alaska. Olnes, Justin Bryan, Anna Stimmelmayr, Raphaela Quakenbush, Lori Animals Halogenated Diphenyl Ethers Alaska Environmental Monitoring Water Pollutants, Chemical Seals, Earless Fluorocarbons Phoca Arctic Regions Ringed (Pusa hispida), bearded (Erignathus barbatus), spotted (Phoca largha), and ribbon (Histriophoca fasciata) seals are sea ice-associated seals and valuable subsistence resources for coastal Alaska Native communities. Per- and polyfluoroalkyl substances (PFASs) and polybrominated diphenyl ethers (PBDEs) are persistent organic pollutants that are prevalent in the Arctic, including Alaska's marine waters. We tested for 28 different PFASs in liver tissue from ringed (n = 10) and bearded (13) seals, and 51 different PBDE congeners or coelutions in blubber tissue from ringed (10), bearded (14), spotted (8), and ribbon (7) seals. Seals in this study were harvested during 2013-2016, ten years after previous studies of PFASs and PBDEs in Alaska's ice seals. Total concentrations of PFASs were three times lower in ringed and bearded seals from this study than in the past and lower than elsewhere in the Arctic. Only PBDE congeners BDE-47 and BDE-209 were found above minimum detection levels in 30-42% of ringed, spotted, and ribbon seals, and no PBDEs were above minimum detection levels in bearded seals. Most PFASs and PBDEs were not detected or present only in low concentrations. Although low levels of PFASs and PBDEs were detected in Alaska's ice seals, periodic monitoring should continue because novel, alternative fluorinated and brominated substances with the potential to bioaccumulate and biomagnify are being produced. Continued monitoring of ice seals for persistent organic pollutants, including PFASs and PBDEs, is critical for tracking these substances in the environment and assuring that seals remain safe for consumption. |
| format | Artículo científico |
| id | pubmed_41931910 |
| institution | PubMed |
| language | en |
| publishDate | 2026 |
| publisher | Marine pollution bulletin |
| record_format | pubmed |
| spellingShingle | Evidence for recent declines in PFASs and PBDEs in subsistence-harvested ice seals from Alaska. Olnes, Justin Bryan, Anna Stimmelmayr, Raphaela Quakenbush, Lori Animals Halogenated Diphenyl Ethers Alaska Environmental Monitoring Water Pollutants, Chemical Seals, Earless Fluorocarbons Phoca Arctic Regions Evidence for recent declines in PFASs and PBDEs in subsistence-harvested ice seals from Alaska. Olnes, Justin Bryan, Anna Stimmelmayr, Raphaela Quakenbush, Lori Animals Halogenated Diphenyl Ethers Alaska Environmental Monitoring Water Pollutants, Chemical Seals, Earless Fluorocarbons Phoca Arctic Regions Ringed (Pusa hispida), bearded (Erignathus barbatus), spotted (Phoca largha), and ribbon (Histriophoca fasciata) seals are sea ice-associated seals and valuable subsistence resources for coastal Alaska Native communities. Per- and polyfluoroalkyl substances (PFASs) and polybrominated diphenyl ethers (PBDEs) are persistent organic pollutants that are prevalent in the Arctic, including Alaska's marine waters. We tested for 28 different PFASs in liver tissue from ringed (n = 10) and bearded (13) seals, and 51 different PBDE congeners or coelutions in blubber tissue from ringed (10), bearded (14), spotted (8), and ribbon (7) seals. Seals in this study were harvested during 2013-2016, ten years after previous studies of PFASs and PBDEs in Alaska's ice seals. Total concentrations of PFASs were three times lower in ringed and bearded seals from this study than in the past and lower than elsewhere in the Arctic. Only PBDE congeners BDE-47 and BDE-209 were found above minimum detection levels in 30-42% of ringed, spotted, and ribbon seals, and no PBDEs were above minimum detection levels in bearded seals. Most PFASs and PBDEs were not detected or present only in low concentrations. Although low levels of PFASs and PBDEs were detected in Alaska's ice seals, periodic monitoring should continue because novel, alternative fluorinated and brominated substances with the potential to bioaccumulate and biomagnify are being produced. Continued monitoring of ice seals for persistent organic pollutants, including PFASs and PBDEs, is critical for tracking these substances in the environment and assuring that seals remain safe for consumption. |
| title | Evidence for recent declines in PFASs and PBDEs in subsistence-harvested ice seals from Alaska. |
| topic | Animals Halogenated Diphenyl Ethers Alaska Environmental Monitoring Water Pollutants, Chemical Seals, Earless Fluorocarbons Phoca Arctic Regions |
| url | https://pubmed.ncbi.nlm.nih.gov/41931910/ |