137Cs and 210Po in Pacific Walrus and Bearded Seal from St. Lawrence Island, Alaska
The activity concentration of Cesium-137 ({sup 137}Cs) and naturally-occurring Polonium-210 ({sup 210}Po) were measured in the muscle tissue, kidney and liver of Pacific walrus (Odobenus rosmarus divergens) and bearded seal (Erignathus barbatus) collected by native hunters from the Bering Sea. The m...
Main Authors: | , , , |
---|---|
Language: | unknown |
Published: |
2021
|
Subjects: | |
Online Access: | http://www.osti.gov/servlets/purl/936463 https://www.osti.gov/biblio/936463 |
id |
ftosti:oai:osti.gov:936463 |
---|---|
record_format |
openpolar |
spelling |
ftosti:oai:osti.gov:936463 2023-07-30T04:02:05+02:00 137Cs and 210Po in Pacific Walrus and Bearded Seal from St. Lawrence Island, Alaska Hamilton, T F Seagars, D J Jokela, T Layton, D 2021-05-03 application/pdf http://www.osti.gov/servlets/purl/936463 https://www.osti.gov/biblio/936463 unknown http://www.osti.gov/servlets/purl/936463 https://www.osti.gov/biblio/936463 54 ENVIRONMENTAL SCIENCES ALASKA BERING SEA BIOLOGICAL ACCUMULATION CESIUM 137 COMMUNITIES INGESTION KIDNEYS LIVER MAMMALS MUSCLES POLONIUM 210 RADIOACTIVE WASTES RADIOACTIVITY SEAS TARGETS 2021 ftosti 2023-07-11T08:46:19Z The activity concentration of Cesium-137 ({sup 137}Cs) and naturally-occurring Polonium-210 ({sup 210}Po) were measured in the muscle tissue, kidney and liver of Pacific walrus (Odobenus rosmarus divergens) and bearded seal (Erignathus barbatus) collected by native hunters from the Bering Sea. The mean {sup 137}Cs concentrations in muscle, liver and kidney of Pacific walrus were 0.07, 0.09 and 0.07 Bq kg{sup -1} (N= 5, wet weight), respectively, and 0.17, 0.10, and 0.17 Bq kg{sup -1} (N=2, wet weight), respectively, in bearded seal. In general, {sup 137}Cs tissue concentrations are significantly lower than those previously reported for mammals from other regions. By comparison, {sup 210}Po activity concentrations appear to be higher than those reported elsewhere but a larger variation. The mean {sup 210}Po concentration in the muscle tissue, liver and kidney of Pacific walrus (N=5, wet weight) were 28.7, 189, and 174 Bq kg{sup -1}, respectively. This compares with {sup 210}Po concentration values (N=2, wet weight) of 27, 207, and 68 Bq kg{sup -1} measured in the muscle tissue, liver and kidney, of bearded seal, respectively. Estimated bioaccumulation factors--as defined by the radionuclide concentration ratio between the target tissue to that in sea water--were two to three orders of magnitude higher for {sup 210}Po that those of {sup 137}Cs. We conclude from radiological dose estimates that ingestion of {sup 137}Cs in foods derived from walrus and seal will pose no threat to human health. This work has important implications for assessing health risks to Alaskan coastal communities concerned about the dumping of nuclear waste in the Russia Arctic. Other/Unknown Material Arctic bearded seal Bering Sea Erignathus barbatus Human health Odobenus rosmarus St Lawrence Island Alaska walrus* SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Arctic Bering Sea Pacific Lawrence Island ENVELOPE(-103.718,-103.718,56.967,56.967) |
institution |
Open Polar |
collection |
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
op_collection_id |
ftosti |
language |
unknown |
topic |
54 ENVIRONMENTAL SCIENCES ALASKA BERING SEA BIOLOGICAL ACCUMULATION CESIUM 137 COMMUNITIES INGESTION KIDNEYS LIVER MAMMALS MUSCLES POLONIUM 210 RADIOACTIVE WASTES RADIOACTIVITY SEAS TARGETS |
spellingShingle |
54 ENVIRONMENTAL SCIENCES ALASKA BERING SEA BIOLOGICAL ACCUMULATION CESIUM 137 COMMUNITIES INGESTION KIDNEYS LIVER MAMMALS MUSCLES POLONIUM 210 RADIOACTIVE WASTES RADIOACTIVITY SEAS TARGETS Hamilton, T F Seagars, D J Jokela, T Layton, D 137Cs and 210Po in Pacific Walrus and Bearded Seal from St. Lawrence Island, Alaska |
topic_facet |
54 ENVIRONMENTAL SCIENCES ALASKA BERING SEA BIOLOGICAL ACCUMULATION CESIUM 137 COMMUNITIES INGESTION KIDNEYS LIVER MAMMALS MUSCLES POLONIUM 210 RADIOACTIVE WASTES RADIOACTIVITY SEAS TARGETS |
description |
The activity concentration of Cesium-137 ({sup 137}Cs) and naturally-occurring Polonium-210 ({sup 210}Po) were measured in the muscle tissue, kidney and liver of Pacific walrus (Odobenus rosmarus divergens) and bearded seal (Erignathus barbatus) collected by native hunters from the Bering Sea. The mean {sup 137}Cs concentrations in muscle, liver and kidney of Pacific walrus were 0.07, 0.09 and 0.07 Bq kg{sup -1} (N= 5, wet weight), respectively, and 0.17, 0.10, and 0.17 Bq kg{sup -1} (N=2, wet weight), respectively, in bearded seal. In general, {sup 137}Cs tissue concentrations are significantly lower than those previously reported for mammals from other regions. By comparison, {sup 210}Po activity concentrations appear to be higher than those reported elsewhere but a larger variation. The mean {sup 210}Po concentration in the muscle tissue, liver and kidney of Pacific walrus (N=5, wet weight) were 28.7, 189, and 174 Bq kg{sup -1}, respectively. This compares with {sup 210}Po concentration values (N=2, wet weight) of 27, 207, and 68 Bq kg{sup -1} measured in the muscle tissue, liver and kidney, of bearded seal, respectively. Estimated bioaccumulation factors--as defined by the radionuclide concentration ratio between the target tissue to that in sea water--were two to three orders of magnitude higher for {sup 210}Po that those of {sup 137}Cs. We conclude from radiological dose estimates that ingestion of {sup 137}Cs in foods derived from walrus and seal will pose no threat to human health. This work has important implications for assessing health risks to Alaskan coastal communities concerned about the dumping of nuclear waste in the Russia Arctic. |
author |
Hamilton, T F Seagars, D J Jokela, T Layton, D |
author_facet |
Hamilton, T F Seagars, D J Jokela, T Layton, D |
author_sort |
Hamilton, T F |
title |
137Cs and 210Po in Pacific Walrus and Bearded Seal from St. Lawrence Island, Alaska |
title_short |
137Cs and 210Po in Pacific Walrus and Bearded Seal from St. Lawrence Island, Alaska |
title_full |
137Cs and 210Po in Pacific Walrus and Bearded Seal from St. Lawrence Island, Alaska |
title_fullStr |
137Cs and 210Po in Pacific Walrus and Bearded Seal from St. Lawrence Island, Alaska |
title_full_unstemmed |
137Cs and 210Po in Pacific Walrus and Bearded Seal from St. Lawrence Island, Alaska |
title_sort |
137cs and 210po in pacific walrus and bearded seal from st. lawrence island, alaska |
publishDate |
2021 |
url |
http://www.osti.gov/servlets/purl/936463 https://www.osti.gov/biblio/936463 |
long_lat |
ENVELOPE(-103.718,-103.718,56.967,56.967) |
geographic |
Arctic Bering Sea Pacific Lawrence Island |
geographic_facet |
Arctic Bering Sea Pacific Lawrence Island |
genre |
Arctic bearded seal Bering Sea Erignathus barbatus Human health Odobenus rosmarus St Lawrence Island Alaska walrus* |
genre_facet |
Arctic bearded seal Bering Sea Erignathus barbatus Human health Odobenus rosmarus St Lawrence Island Alaska walrus* |
op_relation |
http://www.osti.gov/servlets/purl/936463 https://www.osti.gov/biblio/936463 |
_version_ |
1772812815359279104 |