Mercury and selenium in ringed and bearded seal tissues from Arctic Canada. Arctic
ABSTRACT. Analyses for total mercury, methyl Schreber mercury and selenium, with age determinations for 390 ringed seals (Phoca hispida Shreber) and 64 bearded seals [Erignathus barbarus (Erxleben)] from 7 localities across the Canadian Arctic confirm (with up to 420 ppm) earlier reports of very hig...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.581.5053 2023-05-15T14:19:44+02:00 Mercury and selenium in ringed and bearded seal tissues from Arctic Canada. Arctic Thomas G. Smith F. A. J Armstrong The Pennsylvania State University CiteSeerX Archives 1978 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.581.5053 http://pubs.aina.ucalgary.ca/arctic/Arctic31-2-75.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.581.5053 http://pubs.aina.ucalgary.ca/arctic/Arctic31-2-75.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://pubs.aina.ucalgary.ca/arctic/Arctic31-2-75.pdf text 1978 ftciteseerx 2016-01-08T13:02:48Z ABSTRACT. Analyses for total mercury, methyl Schreber mercury and selenium, with age determinations for 390 ringed seals (Phoca hispida Shreber) and 64 bearded seals [Erignathus barbarus (Erxleben)] from 7 localities across the Canadian Arctic confirm (with up to 420 ppm) earlier reports of very high values for total mercury in liver. Concentrations in muscle were higher than 0.5 ppm in mature animals. There were no significant differences between localities. Mercury and age show a strong positive correlation, and so do selenium and age; the concomitant correlation between mercury and selenium is striking, the elements occurring together in a ratio by atoms of close to 1: 1. Rates of accumulation appear to be somewhat higher in bearded seals. Methyl mercury in liver amounts to less than 5 percent of the total in ringed seals and to less than 1 percent in bearded seals. There appears to be a small increase with age of the fraction present as methyl mercury. This low proportion of methyl mercury in liver, together with some 75 % in muscle is in contrast to reports of 89 % methyl mercury in the blood of Inuit in Arctic Bay and remains to be explained. Text Arctic Arctic bay Arctic bearded seal inuit Phoca hispida Unknown Arctic Arctic Bay ENVELOPE(-85.116,-85.116,73.018,73.018) Canada |
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Open Polar |
collection |
Unknown |
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ftciteseerx |
language |
English |
description |
ABSTRACT. Analyses for total mercury, methyl Schreber mercury and selenium, with age determinations for 390 ringed seals (Phoca hispida Shreber) and 64 bearded seals [Erignathus barbarus (Erxleben)] from 7 localities across the Canadian Arctic confirm (with up to 420 ppm) earlier reports of very high values for total mercury in liver. Concentrations in muscle were higher than 0.5 ppm in mature animals. There were no significant differences between localities. Mercury and age show a strong positive correlation, and so do selenium and age; the concomitant correlation between mercury and selenium is striking, the elements occurring together in a ratio by atoms of close to 1: 1. Rates of accumulation appear to be somewhat higher in bearded seals. Methyl mercury in liver amounts to less than 5 percent of the total in ringed seals and to less than 1 percent in bearded seals. There appears to be a small increase with age of the fraction present as methyl mercury. This low proportion of methyl mercury in liver, together with some 75 % in muscle is in contrast to reports of 89 % methyl mercury in the blood of Inuit in Arctic Bay and remains to be explained. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Thomas G. Smith F. A. J Armstrong |
spellingShingle |
Thomas G. Smith F. A. J Armstrong Mercury and selenium in ringed and bearded seal tissues from Arctic Canada. Arctic |
author_facet |
Thomas G. Smith F. A. J Armstrong |
author_sort |
Thomas G. Smith |
title |
Mercury and selenium in ringed and bearded seal tissues from Arctic Canada. Arctic |
title_short |
Mercury and selenium in ringed and bearded seal tissues from Arctic Canada. Arctic |
title_full |
Mercury and selenium in ringed and bearded seal tissues from Arctic Canada. Arctic |
title_fullStr |
Mercury and selenium in ringed and bearded seal tissues from Arctic Canada. Arctic |
title_full_unstemmed |
Mercury and selenium in ringed and bearded seal tissues from Arctic Canada. Arctic |
title_sort |
mercury and selenium in ringed and bearded seal tissues from arctic canada. arctic |
publishDate |
1978 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.581.5053 http://pubs.aina.ucalgary.ca/arctic/Arctic31-2-75.pdf |
long_lat |
ENVELOPE(-85.116,-85.116,73.018,73.018) |
geographic |
Arctic Arctic Bay Canada |
geographic_facet |
Arctic Arctic Bay Canada |
genre |
Arctic Arctic bay Arctic bearded seal inuit Phoca hispida |
genre_facet |
Arctic Arctic bay Arctic bearded seal inuit Phoca hispida |
op_source |
http://pubs.aina.ucalgary.ca/arctic/Arctic31-2-75.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.581.5053 http://pubs.aina.ucalgary.ca/arctic/Arctic31-2-75.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766291477302870016 |