Cadmium, mercury, zinc and selenium in ringed seals (Phoca hispida) from Greenland and Svalbard
Muscle, liver, and kidney tissue from 456 ringed seals (Phoca hispida) from eight areas inGreenland were analysed for cadmium, mercury, zinc and selenium. In general, cadmium concentrationswere high in liver and kidney tissue, with geometric means of 7.79 and 33.5 μg/g (all dataon wet weight basis),...
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1998
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ftunitroemsoe:oai:ojs.henry.ub.uit.no:article/2992 2023-05-15T16:03:56+02:00 Cadmium, mercury, zinc and selenium in ringed seals (Phoca hispida) from Greenland and Svalbard Dietz, Rune Paludan-Müller, Paul Agger, Carsten Thye Nielsen, Christian Overgaard 1998-06-13 application/pdf https://septentrio.uit.no/index.php/NAMMCOSP/article/view/2992 https://doi.org/10.7557/3.2992 eng eng Septentrio Academic Publishing https://septentrio.uit.no/index.php/NAMMCOSP/article/view/2992/2870 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/2992 doi:10.7557/3.2992 Copyright (c) 1998 Run Dietz, Paul Paludan-Müller, Carsten Thye Agger, Christian Overgaard Nielsen http://creativecommons.org/licenses/by/3.0/ CC-BY NAMMCO Scientific Publications; Vol 1: Ringed Seals in the North Atlantic; 242-272 2309-2491 1560-2206 10.7557/3.1 ringed seals Phoca hispida contaminants heavy metals pollutants info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 1998 ftunitroemsoe https://doi.org/10.7557/3.2992 https://doi.org/10.7557/3.1 2021-08-16T16:42:48Z Muscle, liver, and kidney tissue from 456 ringed seals (Phoca hispida) from eight areas inGreenland were analysed for cadmium, mercury, zinc and selenium. In general, cadmium concentrationswere high in liver and kidney tissue, with geometric means of 7.79 and 33.5 μg/g (all dataon wet weight basis), respectively. Muscle levels were considerably lower, at 0.067 μg/g. The concentration of mercury was relatively high in liver tissue with a geometric mean of 2.59 μg/g. Muscle and kidney mercury levels were somewhat lower, with geometric means of 0.210 and 0.956 μg/g, respectively. Cadmium and mercury levels were strongly dependent upon age and sampling area, as well as theinteraction combinations, indicating that the accumulation of cadmium and mercury varies with ageand area. Mercury accumulated in all three tissues throughout life, whereas cadmium in liver andkidneys peaked in the age group 5-10 years old where after it dropped significantly. Cadmium levels showed a tendency towards higher concentrations in the northern municipalities,which may be due to the higher cadmium levels in certain prey items in the northern areas. Mercurylevels were higher in seals from East Greenland compared to West Greenland. Variations in feedinghabits probably explain some of the differences in levels of cadmium and mercury in ringed sealsfrom different geographical areas. Cadmium concentrations were correlated (both pairwise and partial) in the three organs. This wastrue for mercury as well, whereas only half of the combinations were significant for zinc and selenium.Cadmium was strongly correlated to mercury in all three tissues and zinc only in liver andkidneys. Mercury was only correlated to selenium in liver and not to zinc. High concentrations of cadmium were found in the bile from 58 ringed seals, and were about 10-fold higher than in muscle. The concentration of mercury in bile was relatively low, being only onethird of the muscle level. The bile levels reflect that substantial amounts of especially cadmium arecirculated through the bile. However, it is uncertain whether these amounts are actually excreted orreabsorbed in the intestine (enterohepatic circulation). Article in Journal/Newspaper East Greenland Greenland Phoca hispida Svalbard University of Tromsø: Septentrio Academic Publishing Greenland Svalbard NAMMCO Scientific Publications 1 242 |
institution |
Open Polar |
collection |
University of Tromsø: Septentrio Academic Publishing |
op_collection_id |
ftunitroemsoe |
language |
English |
topic |
ringed seals Phoca hispida contaminants heavy metals pollutants |
spellingShingle |
ringed seals Phoca hispida contaminants heavy metals pollutants Dietz, Rune Paludan-Müller, Paul Agger, Carsten Thye Nielsen, Christian Overgaard Cadmium, mercury, zinc and selenium in ringed seals (Phoca hispida) from Greenland and Svalbard |
topic_facet |
ringed seals Phoca hispida contaminants heavy metals pollutants |
description |
Muscle, liver, and kidney tissue from 456 ringed seals (Phoca hispida) from eight areas inGreenland were analysed for cadmium, mercury, zinc and selenium. In general, cadmium concentrationswere high in liver and kidney tissue, with geometric means of 7.79 and 33.5 μg/g (all dataon wet weight basis), respectively. Muscle levels were considerably lower, at 0.067 μg/g. The concentration of mercury was relatively high in liver tissue with a geometric mean of 2.59 μg/g. Muscle and kidney mercury levels were somewhat lower, with geometric means of 0.210 and 0.956 μg/g, respectively. Cadmium and mercury levels were strongly dependent upon age and sampling area, as well as theinteraction combinations, indicating that the accumulation of cadmium and mercury varies with ageand area. Mercury accumulated in all three tissues throughout life, whereas cadmium in liver andkidneys peaked in the age group 5-10 years old where after it dropped significantly. Cadmium levels showed a tendency towards higher concentrations in the northern municipalities,which may be due to the higher cadmium levels in certain prey items in the northern areas. Mercurylevels were higher in seals from East Greenland compared to West Greenland. Variations in feedinghabits probably explain some of the differences in levels of cadmium and mercury in ringed sealsfrom different geographical areas. Cadmium concentrations were correlated (both pairwise and partial) in the three organs. This wastrue for mercury as well, whereas only half of the combinations were significant for zinc and selenium.Cadmium was strongly correlated to mercury in all three tissues and zinc only in liver andkidneys. Mercury was only correlated to selenium in liver and not to zinc. High concentrations of cadmium were found in the bile from 58 ringed seals, and were about 10-fold higher than in muscle. The concentration of mercury in bile was relatively low, being only onethird of the muscle level. The bile levels reflect that substantial amounts of especially cadmium arecirculated through the bile. However, it is uncertain whether these amounts are actually excreted orreabsorbed in the intestine (enterohepatic circulation). |
format |
Article in Journal/Newspaper |
author |
Dietz, Rune Paludan-Müller, Paul Agger, Carsten Thye Nielsen, Christian Overgaard |
author_facet |
Dietz, Rune Paludan-Müller, Paul Agger, Carsten Thye Nielsen, Christian Overgaard |
author_sort |
Dietz, Rune |
title |
Cadmium, mercury, zinc and selenium in ringed seals (Phoca hispida) from Greenland and Svalbard |
title_short |
Cadmium, mercury, zinc and selenium in ringed seals (Phoca hispida) from Greenland and Svalbard |
title_full |
Cadmium, mercury, zinc and selenium in ringed seals (Phoca hispida) from Greenland and Svalbard |
title_fullStr |
Cadmium, mercury, zinc and selenium in ringed seals (Phoca hispida) from Greenland and Svalbard |
title_full_unstemmed |
Cadmium, mercury, zinc and selenium in ringed seals (Phoca hispida) from Greenland and Svalbard |
title_sort |
cadmium, mercury, zinc and selenium in ringed seals (phoca hispida) from greenland and svalbard |
publisher |
Septentrio Academic Publishing |
publishDate |
1998 |
url |
https://septentrio.uit.no/index.php/NAMMCOSP/article/view/2992 https://doi.org/10.7557/3.2992 |
geographic |
Greenland Svalbard |
geographic_facet |
Greenland Svalbard |
genre |
East Greenland Greenland Phoca hispida Svalbard |
genre_facet |
East Greenland Greenland Phoca hispida Svalbard |
op_source |
NAMMCO Scientific Publications; Vol 1: Ringed Seals in the North Atlantic; 242-272 2309-2491 1560-2206 10.7557/3.1 |
op_relation |
https://septentrio.uit.no/index.php/NAMMCOSP/article/view/2992/2870 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/2992 doi:10.7557/3.2992 |
op_rights |
Copyright (c) 1998 Run Dietz, Paul Paludan-Müller, Carsten Thye Agger, Christian Overgaard Nielsen http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.7557/3.2992 https://doi.org/10.7557/3.1 |
container_title |
NAMMCO Scientific Publications |
container_volume |
1 |
container_start_page |
242 |
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1766399622069092352 |