Lake Trout ( Salvelinus namaycush) Control of Snail Density and Size Distribution in an Arctic Lake
In arctic Alaskan lakes the density and size distribution of the snail Lymnaea elodes appear to be greatly affected by the presence or absence of lake trout (Salvelinus namaycush). Snail densities were much lower and size distributions depressed in lakes where trout were present. During the summer o...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Canadian Science Publishing
1991
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Online Access: | http://dx.doi.org/10.1139/f91-064 http://www.nrcresearchpress.com/doi/pdf/10.1139/f91-064 |
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crcansciencepubl:10.1139/f91-064 2024-05-19T07:35:01+00:00 Lake Trout ( Salvelinus namaycush) Control of Snail Density and Size Distribution in an Arctic Lake Merrick, Glenn W. Hershey, Anne E. McDonald, Michael E. 1991 http://dx.doi.org/10.1139/f91-064 http://www.nrcresearchpress.com/doi/pdf/10.1139/f91-064 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 48, issue 3, page 498-502 ISSN 0706-652X 1205-7533 journal-article 1991 crcansciencepubl https://doi.org/10.1139/f91-064 2024-04-25T06:52:00Z In arctic Alaskan lakes the density and size distribution of the snail Lymnaea elodes appear to be greatly affected by the presence or absence of lake trout (Salvelinus namaycush). Snail densities were much lower and size distributions depressed in lakes where trout were present. During the summer of 1986, lake trout were introduced into an arctic lake to test the effects of their predation on the dominant snail Lymnaea elodes. During July and early August, snail densities in the experimental lake remained stable in the deepwater areas of the lake, but increased significantly in the deepwater areas of an adjacent, troutless control lake, probably due to snail migration from the lake periphery in the absence of predation pressure. These experimental results suggest that the observed pattern of snail distribution and size in lakes containing trout is due to Sake trout predation. Article in Journal/Newspaper Arctic Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 48 3 498 502 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
In arctic Alaskan lakes the density and size distribution of the snail Lymnaea elodes appear to be greatly affected by the presence or absence of lake trout (Salvelinus namaycush). Snail densities were much lower and size distributions depressed in lakes where trout were present. During the summer of 1986, lake trout were introduced into an arctic lake to test the effects of their predation on the dominant snail Lymnaea elodes. During July and early August, snail densities in the experimental lake remained stable in the deepwater areas of the lake, but increased significantly in the deepwater areas of an adjacent, troutless control lake, probably due to snail migration from the lake periphery in the absence of predation pressure. These experimental results suggest that the observed pattern of snail distribution and size in lakes containing trout is due to Sake trout predation. |
format |
Article in Journal/Newspaper |
author |
Merrick, Glenn W. Hershey, Anne E. McDonald, Michael E. |
spellingShingle |
Merrick, Glenn W. Hershey, Anne E. McDonald, Michael E. Lake Trout ( Salvelinus namaycush) Control of Snail Density and Size Distribution in an Arctic Lake |
author_facet |
Merrick, Glenn W. Hershey, Anne E. McDonald, Michael E. |
author_sort |
Merrick, Glenn W. |
title |
Lake Trout ( Salvelinus namaycush) Control of Snail Density and Size Distribution in an Arctic Lake |
title_short |
Lake Trout ( Salvelinus namaycush) Control of Snail Density and Size Distribution in an Arctic Lake |
title_full |
Lake Trout ( Salvelinus namaycush) Control of Snail Density and Size Distribution in an Arctic Lake |
title_fullStr |
Lake Trout ( Salvelinus namaycush) Control of Snail Density and Size Distribution in an Arctic Lake |
title_full_unstemmed |
Lake Trout ( Salvelinus namaycush) Control of Snail Density and Size Distribution in an Arctic Lake |
title_sort |
lake trout ( salvelinus namaycush) control of snail density and size distribution in an arctic lake |
publisher |
Canadian Science Publishing |
publishDate |
1991 |
url |
http://dx.doi.org/10.1139/f91-064 http://www.nrcresearchpress.com/doi/pdf/10.1139/f91-064 |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 48, issue 3, page 498-502 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f91-064 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
48 |
container_issue |
3 |
container_start_page |
498 |
op_container_end_page |
502 |
_version_ |
1799473300704854016 |