Temporal and Geographical Variation of Intestinal Ulcers in Grey Seals (Halichoerus grypus) and Environmental Contaminants in Baltic Biota during Four Decades
The prevalence of intestinal ulcers and parasites was investigated in 2172 grey seals (Halichoerus grypus) collected in the Baltic Sea and 49 grey seals collected outside the Baltic Sea (i.e., the Atlantic). An increase in frequency of ileocaeco-colonic ulcers was observed in the early 1980s, follow...
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ftmdpi:oai:mdpi.com:/2076-2615/11/10/2968/ 2023-08-20T04:05:58+02:00 Temporal and Geographical Variation of Intestinal Ulcers in Grey Seals (Halichoerus grypus) and Environmental Contaminants in Baltic Biota during Four Decades Bäcklin Britt-Marie Persson Sara Faxneld Suzanne Rigét F. Frank Roos M. Anna agris 2021-10-15 application/pdf https://doi.org/10.3390/ani11102968 EN eng Multidisciplinary Digital Publishing Institute Aquatic Animals https://dx.doi.org/10.3390/ani11102968 https://creativecommons.org/licenses/by/4.0/ Animals; Volume 11; Issue 10; Pages: 2968 intestinal lesions acanthocephalan parasites herring guillemot Baltic Sea Baltic seal environmental pollutants Text 2021 ftmdpi https://doi.org/10.3390/ani11102968 2023-08-01T02:57:59Z The prevalence of intestinal ulcers and parasites was investigated in 2172 grey seals (Halichoerus grypus) collected in the Baltic Sea and 49 grey seals collected outside the Baltic Sea (i.e., the Atlantic). An increase in frequency of ileocaeco-colonic ulcers was observed in the early 1980s, followed by a decrease in the mid-1990s. At the same time, there was an increase followed by a decrease in brominated flame retardants, Perfluorooctanesulfonic acid (PFOS) and cadmium levels in herring (Clupea harengus), the most common prey item in Baltic grey seal diet, as well as in another top predator in the Baltic, the common guillemot (Uria aalge). The frequency of intestinal ulcers was significantly related to the intensity of acanthocephalan parasites, the age of the seal and the region of the Baltic Sea. Perforation of the intestinal wall was the cause of death in 26 of the investigated Baltic grey seals. In contrast, none of the investigated Atlantic grey seals had intestinal ulcers. They showed a thin colonic wall and very few acanthocephalan parasites. The high prevalence of intestinal ulcers and the high parasite intensity appear to be unique to the Baltic population of grey seals. Text common guillemot Uria aalge uria MDPI Open Access Publishing Animals 11 10 2968 |
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MDPI Open Access Publishing |
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English |
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intestinal lesions acanthocephalan parasites herring guillemot Baltic Sea Baltic seal environmental pollutants |
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intestinal lesions acanthocephalan parasites herring guillemot Baltic Sea Baltic seal environmental pollutants Bäcklin Britt-Marie Persson Sara Faxneld Suzanne Rigét F. Frank Roos M. Anna Temporal and Geographical Variation of Intestinal Ulcers in Grey Seals (Halichoerus grypus) and Environmental Contaminants in Baltic Biota during Four Decades |
topic_facet |
intestinal lesions acanthocephalan parasites herring guillemot Baltic Sea Baltic seal environmental pollutants |
description |
The prevalence of intestinal ulcers and parasites was investigated in 2172 grey seals (Halichoerus grypus) collected in the Baltic Sea and 49 grey seals collected outside the Baltic Sea (i.e., the Atlantic). An increase in frequency of ileocaeco-colonic ulcers was observed in the early 1980s, followed by a decrease in the mid-1990s. At the same time, there was an increase followed by a decrease in brominated flame retardants, Perfluorooctanesulfonic acid (PFOS) and cadmium levels in herring (Clupea harengus), the most common prey item in Baltic grey seal diet, as well as in another top predator in the Baltic, the common guillemot (Uria aalge). The frequency of intestinal ulcers was significantly related to the intensity of acanthocephalan parasites, the age of the seal and the region of the Baltic Sea. Perforation of the intestinal wall was the cause of death in 26 of the investigated Baltic grey seals. In contrast, none of the investigated Atlantic grey seals had intestinal ulcers. They showed a thin colonic wall and very few acanthocephalan parasites. The high prevalence of intestinal ulcers and the high parasite intensity appear to be unique to the Baltic population of grey seals. |
format |
Text |
author |
Bäcklin Britt-Marie Persson Sara Faxneld Suzanne Rigét F. Frank Roos M. Anna |
author_facet |
Bäcklin Britt-Marie Persson Sara Faxneld Suzanne Rigét F. Frank Roos M. Anna |
author_sort |
Bäcklin Britt-Marie |
title |
Temporal and Geographical Variation of Intestinal Ulcers in Grey Seals (Halichoerus grypus) and Environmental Contaminants in Baltic Biota during Four Decades |
title_short |
Temporal and Geographical Variation of Intestinal Ulcers in Grey Seals (Halichoerus grypus) and Environmental Contaminants in Baltic Biota during Four Decades |
title_full |
Temporal and Geographical Variation of Intestinal Ulcers in Grey Seals (Halichoerus grypus) and Environmental Contaminants in Baltic Biota during Four Decades |
title_fullStr |
Temporal and Geographical Variation of Intestinal Ulcers in Grey Seals (Halichoerus grypus) and Environmental Contaminants in Baltic Biota during Four Decades |
title_full_unstemmed |
Temporal and Geographical Variation of Intestinal Ulcers in Grey Seals (Halichoerus grypus) and Environmental Contaminants in Baltic Biota during Four Decades |
title_sort |
temporal and geographical variation of intestinal ulcers in grey seals (halichoerus grypus) and environmental contaminants in baltic biota during four decades |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2021 |
url |
https://doi.org/10.3390/ani11102968 |
op_coverage |
agris |
genre |
common guillemot Uria aalge uria |
genre_facet |
common guillemot Uria aalge uria |
op_source |
Animals; Volume 11; Issue 10; Pages: 2968 |
op_relation |
Aquatic Animals https://dx.doi.org/10.3390/ani11102968 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/ani11102968 |
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Animals |
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11 |
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10 |
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2968 |
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