Congener-specific accumulation and patterns of chlorinated and brominated contaminants in adult male walruses from Svalbard, Norway
Blubber samples from 17 adult, male walruses were sampled in eastern Svalbard and analyzed for chlorinated and brominatedcontaminants. A wide range of contaminants were detected, including PCBs (mean 2000; 95% range 1165–4005 ng/g lipid), DDE(mean 100: 95% range 50–310) ng/g lipid), chlordanes (mean...
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Norwegian Polar Institute
2008
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Online Access: | http://data.npolar.no/dataset/815288eb-846d-51ba-a9fd-0047edb8ccd0 |
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npolardata:oai:npolar.no:dataset/815288eb-846d-51ba-a9fd-0047edb8ccd0 2024-03-03T22:15:37+00:00 Congener-specific accumulation and patterns of chlorinated and brominated contaminants in adult male walruses from Svalbard, Norway Kovacs, Kit M. Wolkers, Hans Lydersen, Christian van Bavel, Bert Ericson, Ingrid Skoglund, Eli BEGINDATE: 2002-08-01 ENDDATE: 2002-08-31 BEGINDATE: 2003-08-01 ENDDATE: 2003-08-31 BEGINDATE: 2004-08-01 ENDDATE: 2004-08-31 ENVELOPE(18.0,18.0,78.5,78.5) OCEAN, ATLANTIC OCEAN, NORTH ATLANTIC OCEAN, SVALBARD AND JAN MAYEN, Svalbard GEOGRAPHIC REGION, ARCTIC GEOGRAPHIC REGION, POLAR 2008-07-10 http://data.npolar.no/dataset/815288eb-846d-51ba-a9fd-0047edb8ccd0 unknown Norwegian Polar Institute BIOTA biology EARTH SCIENCE BIOLOGICAL CLASSIFICATION ANIMALS/VERTEBRATES MAMMALS CARNIVORES SEALS/SEA LIONS/WALRUSES BIOSPHERE ECOLOGICAL DYNAMICS Dataset 2008 npolardata 2017-09-07T07:14:17Z Blubber samples from 17 adult, male walruses were sampled in eastern Svalbard and analyzed for chlorinated and brominatedcontaminants. A wide range of contaminants were detected, including PCBs (mean 2000; 95% range 1165–4005 ng/g lipid), DDE(mean 100: 95% range 50–310) ng/g lipid), chlordanes (mean 2500; 95% range 1347–5009) ng/g lipid, toxaphenes (mean 80; 95%range 51–132 ng/g lipid) and polybrominated diphenyl ethers (PBDEs) (mean15 ng/g; 95% range 9–27 ng/g lipid). PCB and DDElevels were substantially lower than those of animals sampled 10 year earlier in this area, confirming a decreasing trend for thesecompounds in the Arctic. However, compared to other recently sampled marine mammals from Svalbard, walruses showedrelatively high PCB and chlordane levels although they had lower levels of DDE, toxaphenes, and PBDEs, possibly due to speciesandlocation-specific differences in exposure and metabolism.The range in contaminant levels found within the sample group was vast, despite the fact that the animals investigated were alladult males from the same location. The PCB pattern in highly contaminated animals was different from that in animals with lowlevels of contamination, with relatively more persistent PCBs in the highly contaminated group. This suggests that the morecontaminated animals were feeding at higher trophic levels; possibly targeting seals in addition to mollusks as their prey. Thissuggestion was reinforced by the fatty acid profiles of the inner blubber layer of walruses with low versus high contaminant levels,which suggested different diets for the two groups. Dataset Arctic Jan Mayen North Atlantic Svalbard walrus* Norwegian Polar Data Centre Arctic Svalbard Norway Jan Mayen Svalbard ENVELOPE(20.000,20.000,78.000,78.000) ENVELOPE(18.0,18.0,78.5,78.5) |
institution |
Open Polar |
collection |
Norwegian Polar Data Centre |
op_collection_id |
npolardata |
language |
unknown |
topic |
BIOTA biology EARTH SCIENCE BIOLOGICAL CLASSIFICATION ANIMALS/VERTEBRATES MAMMALS CARNIVORES SEALS/SEA LIONS/WALRUSES BIOSPHERE ECOLOGICAL DYNAMICS |
spellingShingle |
BIOTA biology EARTH SCIENCE BIOLOGICAL CLASSIFICATION ANIMALS/VERTEBRATES MAMMALS CARNIVORES SEALS/SEA LIONS/WALRUSES BIOSPHERE ECOLOGICAL DYNAMICS Kovacs, Kit M. Wolkers, Hans Lydersen, Christian van Bavel, Bert Ericson, Ingrid Skoglund, Eli Congener-specific accumulation and patterns of chlorinated and brominated contaminants in adult male walruses from Svalbard, Norway |
topic_facet |
BIOTA biology EARTH SCIENCE BIOLOGICAL CLASSIFICATION ANIMALS/VERTEBRATES MAMMALS CARNIVORES SEALS/SEA LIONS/WALRUSES BIOSPHERE ECOLOGICAL DYNAMICS |
description |
Blubber samples from 17 adult, male walruses were sampled in eastern Svalbard and analyzed for chlorinated and brominatedcontaminants. A wide range of contaminants were detected, including PCBs (mean 2000; 95% range 1165–4005 ng/g lipid), DDE(mean 100: 95% range 50–310) ng/g lipid), chlordanes (mean 2500; 95% range 1347–5009) ng/g lipid, toxaphenes (mean 80; 95%range 51–132 ng/g lipid) and polybrominated diphenyl ethers (PBDEs) (mean15 ng/g; 95% range 9–27 ng/g lipid). PCB and DDElevels were substantially lower than those of animals sampled 10 year earlier in this area, confirming a decreasing trend for thesecompounds in the Arctic. However, compared to other recently sampled marine mammals from Svalbard, walruses showedrelatively high PCB and chlordane levels although they had lower levels of DDE, toxaphenes, and PBDEs, possibly due to speciesandlocation-specific differences in exposure and metabolism.The range in contaminant levels found within the sample group was vast, despite the fact that the animals investigated were alladult males from the same location. The PCB pattern in highly contaminated animals was different from that in animals with lowlevels of contamination, with relatively more persistent PCBs in the highly contaminated group. This suggests that the morecontaminated animals were feeding at higher trophic levels; possibly targeting seals in addition to mollusks as their prey. Thissuggestion was reinforced by the fatty acid profiles of the inner blubber layer of walruses with low versus high contaminant levels,which suggested different diets for the two groups. |
format |
Dataset |
author |
Kovacs, Kit M. Wolkers, Hans Lydersen, Christian van Bavel, Bert Ericson, Ingrid Skoglund, Eli |
author_facet |
Kovacs, Kit M. Wolkers, Hans Lydersen, Christian van Bavel, Bert Ericson, Ingrid Skoglund, Eli |
author_sort |
Kovacs, Kit M. |
title |
Congener-specific accumulation and patterns of chlorinated and brominated contaminants in adult male walruses from Svalbard, Norway |
title_short |
Congener-specific accumulation and patterns of chlorinated and brominated contaminants in adult male walruses from Svalbard, Norway |
title_full |
Congener-specific accumulation and patterns of chlorinated and brominated contaminants in adult male walruses from Svalbard, Norway |
title_fullStr |
Congener-specific accumulation and patterns of chlorinated and brominated contaminants in adult male walruses from Svalbard, Norway |
title_full_unstemmed |
Congener-specific accumulation and patterns of chlorinated and brominated contaminants in adult male walruses from Svalbard, Norway |
title_sort |
congener-specific accumulation and patterns of chlorinated and brominated contaminants in adult male walruses from svalbard, norway |
publisher |
Norwegian Polar Institute |
publishDate |
2008 |
url |
http://data.npolar.no/dataset/815288eb-846d-51ba-a9fd-0047edb8ccd0 |
op_coverage |
BEGINDATE: 2002-08-01 ENDDATE: 2002-08-31 BEGINDATE: 2003-08-01 ENDDATE: 2003-08-31 BEGINDATE: 2004-08-01 ENDDATE: 2004-08-31 ENVELOPE(18.0,18.0,78.5,78.5) OCEAN, ATLANTIC OCEAN, NORTH ATLANTIC OCEAN, SVALBARD AND JAN MAYEN, Svalbard GEOGRAPHIC REGION, ARCTIC GEOGRAPHIC REGION, POLAR |
long_lat |
ENVELOPE(20.000,20.000,78.000,78.000) ENVELOPE(18.0,18.0,78.5,78.5) |
geographic |
Arctic Svalbard Norway Jan Mayen Svalbard |
geographic_facet |
Arctic Svalbard Norway Jan Mayen Svalbard |
genre |
Arctic Jan Mayen North Atlantic Svalbard walrus* |
genre_facet |
Arctic Jan Mayen North Atlantic Svalbard walrus* |
_version_ |
1792545057565310976 |