Infections of Diphyllobothrium dendriticum , D . ditremum (Cestoda), and Cystidicola farionis (Nematoda) in a north Norwegian population of Arctic charr ( Salvelinus alpinus ) during winter
Infections of the parasites Diphyllobothrium dendriticum, Diphyllobothrium ditremum, and Cystidicola farionis in Arctic charr (Salvelinus alpinus) from Takvatn, northern Norway, were followed throughout a 9-month overwintering period. The relative density of all three parasite species increased with...
Published in: | Canadian Journal of Zoology |
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Language: | English |
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Canadian Science Publishing
1994
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Online Access: | http://dx.doi.org/10.1139/z94-261 http://www.nrcresearchpress.com/doi/pdf/10.1139/z94-261 |
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crcansciencepubl:10.1139/z94-261 2024-05-12T07:57:52+00:00 Infections of Diphyllobothrium dendriticum , D . ditremum (Cestoda), and Cystidicola farionis (Nematoda) in a north Norwegian population of Arctic charr ( Salvelinus alpinus ) during winter Knudsen, Rune Klemetsen, Anders 1994 http://dx.doi.org/10.1139/z94-261 http://www.nrcresearchpress.com/doi/pdf/10.1139/z94-261 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 72, issue 11, page 1922-1930 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 1994 crcansciencepubl https://doi.org/10.1139/z94-261 2024-04-18T06:54:54Z Infections of the parasites Diphyllobothrium dendriticum, Diphyllobothrium ditremum, and Cystidicola farionis in Arctic charr (Salvelinus alpinus) from Takvatn, northern Norway, were followed throughout a 9-month overwintering period. The relative density of all three parasite species increased with the age of the host in response to ontogenetic shifts in habitat and food of Arctic charr in the lake. Our results indicate that some recruitment of the three parasite species, particularly D. ditremum, takes place during the winter. However, winter parasite recruitment was lower than in the ice-free season. In spite of high parasite infection in some individuals, no strong indications of parasite-induced host winter mortality were found for any of the three species. Low overwintering mortality of heavily parasitized charr may be connected with a stock-reduction program in the lake that has improved the conditions of the fish, and the residual stock is probably less affected by parasites. Article in Journal/Newspaper Arctic charr Arctic Northern Norway Salvelinus alpinus Canadian Science Publishing Arctic Norway Canadian Journal of Zoology 72 11 1922 1930 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics Knudsen, Rune Klemetsen, Anders Infections of Diphyllobothrium dendriticum , D . ditremum (Cestoda), and Cystidicola farionis (Nematoda) in a north Norwegian population of Arctic charr ( Salvelinus alpinus ) during winter |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
Infections of the parasites Diphyllobothrium dendriticum, Diphyllobothrium ditremum, and Cystidicola farionis in Arctic charr (Salvelinus alpinus) from Takvatn, northern Norway, were followed throughout a 9-month overwintering period. The relative density of all three parasite species increased with the age of the host in response to ontogenetic shifts in habitat and food of Arctic charr in the lake. Our results indicate that some recruitment of the three parasite species, particularly D. ditremum, takes place during the winter. However, winter parasite recruitment was lower than in the ice-free season. In spite of high parasite infection in some individuals, no strong indications of parasite-induced host winter mortality were found for any of the three species. Low overwintering mortality of heavily parasitized charr may be connected with a stock-reduction program in the lake that has improved the conditions of the fish, and the residual stock is probably less affected by parasites. |
format |
Article in Journal/Newspaper |
author |
Knudsen, Rune Klemetsen, Anders |
author_facet |
Knudsen, Rune Klemetsen, Anders |
author_sort |
Knudsen, Rune |
title |
Infections of Diphyllobothrium dendriticum , D . ditremum (Cestoda), and Cystidicola farionis (Nematoda) in a north Norwegian population of Arctic charr ( Salvelinus alpinus ) during winter |
title_short |
Infections of Diphyllobothrium dendriticum , D . ditremum (Cestoda), and Cystidicola farionis (Nematoda) in a north Norwegian population of Arctic charr ( Salvelinus alpinus ) during winter |
title_full |
Infections of Diphyllobothrium dendriticum , D . ditremum (Cestoda), and Cystidicola farionis (Nematoda) in a north Norwegian population of Arctic charr ( Salvelinus alpinus ) during winter |
title_fullStr |
Infections of Diphyllobothrium dendriticum , D . ditremum (Cestoda), and Cystidicola farionis (Nematoda) in a north Norwegian population of Arctic charr ( Salvelinus alpinus ) during winter |
title_full_unstemmed |
Infections of Diphyllobothrium dendriticum , D . ditremum (Cestoda), and Cystidicola farionis (Nematoda) in a north Norwegian population of Arctic charr ( Salvelinus alpinus ) during winter |
title_sort |
infections of diphyllobothrium dendriticum , d . ditremum (cestoda), and cystidicola farionis (nematoda) in a north norwegian population of arctic charr ( salvelinus alpinus ) during winter |
publisher |
Canadian Science Publishing |
publishDate |
1994 |
url |
http://dx.doi.org/10.1139/z94-261 http://www.nrcresearchpress.com/doi/pdf/10.1139/z94-261 |
geographic |
Arctic Norway |
geographic_facet |
Arctic Norway |
genre |
Arctic charr Arctic Northern Norway Salvelinus alpinus |
genre_facet |
Arctic charr Arctic Northern Norway Salvelinus alpinus |
op_source |
Canadian Journal of Zoology volume 72, issue 11, page 1922-1930 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z94-261 |
container_title |
Canadian Journal of Zoology |
container_volume |
72 |
container_issue |
11 |
container_start_page |
1922 |
op_container_end_page |
1930 |
_version_ |
1798838248835907584 |