Population Structure, Ecological Segregation, and Reproduction in a Population of Arctic Char ( Salvelinus alpinus ) from Lake Tasersuaq, Greenland
The population of Arctic char (Salvelinus alpinus) in a large lake, Tasersuaq, in West Greenland consisted of three distinct size groups representing ecological forms with differences in habitat, feeding, and reproduction. Smaller char were benthic and fed on chironomids whereas medium-sized char we...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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1986
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Online Access: | http://dx.doi.org/10.1139/f86-121 http://www.nrcresearchpress.com/doi/pdf/10.1139/f86-121 |
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crcansciencepubl:10.1139/f86-121 2023-12-17T10:25:15+01:00 Population Structure, Ecological Segregation, and Reproduction in a Population of Arctic Char ( Salvelinus alpinus ) from Lake Tasersuaq, Greenland Riget, F. F. Nygaard, K. H. Christensen, B. 1986 http://dx.doi.org/10.1139/f86-121 http://www.nrcresearchpress.com/doi/pdf/10.1139/f86-121 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 43, issue 5, page 985-992 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1986 crcansciencepubl https://doi.org/10.1139/f86-121 2023-11-19T13:38:23Z The population of Arctic char (Salvelinus alpinus) in a large lake, Tasersuaq, in West Greenland consisted of three distinct size groups representing ecological forms with differences in habitat, feeding, and reproduction. Smaller char were benthic and fed on chironomids whereas medium-sized char were living pelagically in summer, feeding on zooplankton. Larger char moved randomly over the strata, and cannibalism increased in importance with increasing size. Within each size group there was a great variation in age. All three groups contained spawners but spawning frequency variated between groups. Smaller forms probably transform to larger ones with correlated shifts in diet and periods of somatic growth only. We hypothesize that the ecological forms of the Tasersuaq population may represent an early step towards speciation. This view bridges the opposing interpretations of char populations presented in the literature considering different forms as belonging to either a common gene pool or to reproductively isolated sibling species. Article in Journal/Newspaper Arctic Greenland Salvelinus alpinus Zooplankton Canadian Science Publishing (via Crossref) Arctic Greenland Canadian Journal of Fisheries and Aquatic Sciences 43 5 985 992 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Riget, F. F. Nygaard, K. H. Christensen, B. Population Structure, Ecological Segregation, and Reproduction in a Population of Arctic Char ( Salvelinus alpinus ) from Lake Tasersuaq, Greenland |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
The population of Arctic char (Salvelinus alpinus) in a large lake, Tasersuaq, in West Greenland consisted of three distinct size groups representing ecological forms with differences in habitat, feeding, and reproduction. Smaller char were benthic and fed on chironomids whereas medium-sized char were living pelagically in summer, feeding on zooplankton. Larger char moved randomly over the strata, and cannibalism increased in importance with increasing size. Within each size group there was a great variation in age. All three groups contained spawners but spawning frequency variated between groups. Smaller forms probably transform to larger ones with correlated shifts in diet and periods of somatic growth only. We hypothesize that the ecological forms of the Tasersuaq population may represent an early step towards speciation. This view bridges the opposing interpretations of char populations presented in the literature considering different forms as belonging to either a common gene pool or to reproductively isolated sibling species. |
format |
Article in Journal/Newspaper |
author |
Riget, F. F. Nygaard, K. H. Christensen, B. |
author_facet |
Riget, F. F. Nygaard, K. H. Christensen, B. |
author_sort |
Riget, F. F. |
title |
Population Structure, Ecological Segregation, and Reproduction in a Population of Arctic Char ( Salvelinus alpinus ) from Lake Tasersuaq, Greenland |
title_short |
Population Structure, Ecological Segregation, and Reproduction in a Population of Arctic Char ( Salvelinus alpinus ) from Lake Tasersuaq, Greenland |
title_full |
Population Structure, Ecological Segregation, and Reproduction in a Population of Arctic Char ( Salvelinus alpinus ) from Lake Tasersuaq, Greenland |
title_fullStr |
Population Structure, Ecological Segregation, and Reproduction in a Population of Arctic Char ( Salvelinus alpinus ) from Lake Tasersuaq, Greenland |
title_full_unstemmed |
Population Structure, Ecological Segregation, and Reproduction in a Population of Arctic Char ( Salvelinus alpinus ) from Lake Tasersuaq, Greenland |
title_sort |
population structure, ecological segregation, and reproduction in a population of arctic char ( salvelinus alpinus ) from lake tasersuaq, greenland |
publisher |
Canadian Science Publishing |
publishDate |
1986 |
url |
http://dx.doi.org/10.1139/f86-121 http://www.nrcresearchpress.com/doi/pdf/10.1139/f86-121 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland Salvelinus alpinus Zooplankton |
genre_facet |
Arctic Greenland Salvelinus alpinus Zooplankton |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 43, issue 5, page 985-992 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f86-121 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
43 |
container_issue |
5 |
container_start_page |
985 |
op_container_end_page |
992 |
_version_ |
1785574829826506752 |