Parasite communities in two sympatric morphs of Arctic charr, Salvelinus alpinus (L.), in northern Norway
In this study from Fjellfrøsvatn, an oligotrophic lake in northern Norway, the parasite communities in two sympatric Arctic charr populations were compared. The dwarf morph, which inhabits the profundal zone, exhibited the lowest parasite diversity, seven species, and 72% of these charr harboured on...
Published in: | Canadian Journal of Zoology |
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Canadian Science Publishing
1997
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Online Access: | http://dx.doi.org/10.1139/z97-833 http://www.nrcresearchpress.com/doi/pdf/10.1139/z97-833 |
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crcansciencepubl:10.1139/z97-833 2024-09-15T17:52:23+00:00 Parasite communities in two sympatric morphs of Arctic charr, Salvelinus alpinus (L.), in northern Norway Knudsen, R. Kristoffersen, R. Amundsen, P.-A. 1997 http://dx.doi.org/10.1139/z97-833 http://www.nrcresearchpress.com/doi/pdf/10.1139/z97-833 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 75, issue 12, page 2003-2009 ISSN 0008-4301 1480-3283 journal-article 1997 crcansciencepubl https://doi.org/10.1139/z97-833 2024-08-08T04:13:39Z In this study from Fjellfrøsvatn, an oligotrophic lake in northern Norway, the parasite communities in two sympatric Arctic charr populations were compared. The dwarf morph, which inhabits the profundal zone, exhibited the lowest parasite diversity, seven species, and 72% of these charr harboured only one or two parasite species. In contrast, 10 parasite species were encountered in the larger normal charr, and between 5 and 8 species were present in 73% of these fish, which also utilised a broader food and habitat niche. Proteocephalus sp. was by far the most abundant species in the dwarf charr, probably because this morph fed intensively upon the benthic copepod Acanthocyclops gigas. On the other hand, parasites that are transmitted with littoral benthic prey (i.e., Phyllodistomum umblae, Cyathocephalus truncatus, Cystidicola farionis, and Crepidostomum spp.) were almost absent in the dwarf charr, though they were common in the normal morph. Also, Diphyllobothrium spp. were more prevalent in the normal charr, and this was attributed to their feeding upon limnetic copepods in the pelagic zone. The only recorded parasite with a direct life cycle, the copepod Salmincola edwardsii, had relatively similar abundances in the two morphs. The considerable differences in parasite community structure and abundance between the two charr populations were closely related to differences in the width and composition of the habitat and food niches between the morphs. Article in Journal/Newspaper Arctic charr Northern Norway Salvelinus alpinus Copepods Canadian Science Publishing Canadian Journal of Zoology 75 12 2003 2009 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
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English |
description |
In this study from Fjellfrøsvatn, an oligotrophic lake in northern Norway, the parasite communities in two sympatric Arctic charr populations were compared. The dwarf morph, which inhabits the profundal zone, exhibited the lowest parasite diversity, seven species, and 72% of these charr harboured only one or two parasite species. In contrast, 10 parasite species were encountered in the larger normal charr, and between 5 and 8 species were present in 73% of these fish, which also utilised a broader food and habitat niche. Proteocephalus sp. was by far the most abundant species in the dwarf charr, probably because this morph fed intensively upon the benthic copepod Acanthocyclops gigas. On the other hand, parasites that are transmitted with littoral benthic prey (i.e., Phyllodistomum umblae, Cyathocephalus truncatus, Cystidicola farionis, and Crepidostomum spp.) were almost absent in the dwarf charr, though they were common in the normal morph. Also, Diphyllobothrium spp. were more prevalent in the normal charr, and this was attributed to their feeding upon limnetic copepods in the pelagic zone. The only recorded parasite with a direct life cycle, the copepod Salmincola edwardsii, had relatively similar abundances in the two morphs. The considerable differences in parasite community structure and abundance between the two charr populations were closely related to differences in the width and composition of the habitat and food niches between the morphs. |
format |
Article in Journal/Newspaper |
author |
Knudsen, R. Kristoffersen, R. Amundsen, P.-A. |
spellingShingle |
Knudsen, R. Kristoffersen, R. Amundsen, P.-A. Parasite communities in two sympatric morphs of Arctic charr, Salvelinus alpinus (L.), in northern Norway |
author_facet |
Knudsen, R. Kristoffersen, R. Amundsen, P.-A. |
author_sort |
Knudsen, R. |
title |
Parasite communities in two sympatric morphs of Arctic charr, Salvelinus alpinus (L.), in northern Norway |
title_short |
Parasite communities in two sympatric morphs of Arctic charr, Salvelinus alpinus (L.), in northern Norway |
title_full |
Parasite communities in two sympatric morphs of Arctic charr, Salvelinus alpinus (L.), in northern Norway |
title_fullStr |
Parasite communities in two sympatric morphs of Arctic charr, Salvelinus alpinus (L.), in northern Norway |
title_full_unstemmed |
Parasite communities in two sympatric morphs of Arctic charr, Salvelinus alpinus (L.), in northern Norway |
title_sort |
parasite communities in two sympatric morphs of arctic charr, salvelinus alpinus (l.), in northern norway |
publisher |
Canadian Science Publishing |
publishDate |
1997 |
url |
http://dx.doi.org/10.1139/z97-833 http://www.nrcresearchpress.com/doi/pdf/10.1139/z97-833 |
genre |
Arctic charr Northern Norway Salvelinus alpinus Copepods |
genre_facet |
Arctic charr Northern Norway Salvelinus alpinus Copepods |
op_source |
Canadian Journal of Zoology volume 75, issue 12, page 2003-2009 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z97-833 |
container_title |
Canadian Journal of Zoology |
container_volume |
75 |
container_issue |
12 |
container_start_page |
2003 |
op_container_end_page |
2009 |
_version_ |
1810294427760984064 |