Piscivory and cannibalism in Arctic charr
Piscivory and cannibalism in Arctic charr, Salvelinus alpinus , were studied in three lakes in northern Norway: Guolasjavri, which contains only charr, Takvatn, where Arctic charr coexist with three‐spined sticklebacks, Gasterosteus aculeatus and brown trout, Salmo trutta , and Stuorajavri, where wh...
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crwiley:10.1111/j.1095-8649.1994.tb01092.x 2024-09-15T17:52:19+00:00 Piscivory and cannibalism in Arctic charr Amundsen, P.‐ A. 1994 http://dx.doi.org/10.1111/j.1095-8649.1994.tb01092.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1994.tb01092.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1994.tb01092.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Biology volume 45, issue sA, page 181-189 ISSN 0022-1112 1095-8649 journal-article 1994 crwiley https://doi.org/10.1111/j.1095-8649.1994.tb01092.x 2024-08-22T04:17:52Z Piscivory and cannibalism in Arctic charr, Salvelinus alpinus , were studied in three lakes in northern Norway: Guolasjavri, which contains only charr, Takvatn, where Arctic charr coexist with three‐spined sticklebacks, Gasterosteus aculeatus and brown trout, Salmo trutta , and Stuorajavri, where whitefish, Coregonus lavarelun dominate a fish community containing six species. The prevalence of piscivory in the Arctic charr populations generally increased with increasing predator size. In all three lakes, many charr larger than 20 cm were piscivorous, but the extent of piscivory and cannibalism varied. The greatest prevalence of cannibalism was found in Guolasjavri, where 27% of charr greater than 20 cm in length had fed upon smaller conspeciflcs. In Takvatn, 5% of charr larger than 20 cm were cannibalistic, and an additional 9% had eaten three‐spined sticklebacks. In Stuorajavri, up to 74% of the charr greater than 20 cm had eaten whitefish but cannibalism was not recorded. The possible role of cannibalism in population regulation within Arctic charr populations is considered. Article in Journal/Newspaper Arctic charr Northern Norway Salvelinus alpinus Wiley Online Library Journal of Fish Biology 45 sa 181 189 |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
Piscivory and cannibalism in Arctic charr, Salvelinus alpinus , were studied in three lakes in northern Norway: Guolasjavri, which contains only charr, Takvatn, where Arctic charr coexist with three‐spined sticklebacks, Gasterosteus aculeatus and brown trout, Salmo trutta , and Stuorajavri, where whitefish, Coregonus lavarelun dominate a fish community containing six species. The prevalence of piscivory in the Arctic charr populations generally increased with increasing predator size. In all three lakes, many charr larger than 20 cm were piscivorous, but the extent of piscivory and cannibalism varied. The greatest prevalence of cannibalism was found in Guolasjavri, where 27% of charr greater than 20 cm in length had fed upon smaller conspeciflcs. In Takvatn, 5% of charr larger than 20 cm were cannibalistic, and an additional 9% had eaten three‐spined sticklebacks. In Stuorajavri, up to 74% of the charr greater than 20 cm had eaten whitefish but cannibalism was not recorded. The possible role of cannibalism in population regulation within Arctic charr populations is considered. |
format |
Article in Journal/Newspaper |
author |
Amundsen, P.‐ A. |
spellingShingle |
Amundsen, P.‐ A. Piscivory and cannibalism in Arctic charr |
author_facet |
Amundsen, P.‐ A. |
author_sort |
Amundsen, P.‐ A. |
title |
Piscivory and cannibalism in Arctic charr |
title_short |
Piscivory and cannibalism in Arctic charr |
title_full |
Piscivory and cannibalism in Arctic charr |
title_fullStr |
Piscivory and cannibalism in Arctic charr |
title_full_unstemmed |
Piscivory and cannibalism in Arctic charr |
title_sort |
piscivory and cannibalism in arctic charr |
publisher |
Wiley |
publishDate |
1994 |
url |
http://dx.doi.org/10.1111/j.1095-8649.1994.tb01092.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1994.tb01092.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1994.tb01092.x |
genre |
Arctic charr Northern Norway Salvelinus alpinus |
genre_facet |
Arctic charr Northern Norway Salvelinus alpinus |
op_source |
Journal of Fish Biology volume 45, issue sA, page 181-189 ISSN 0022-1112 1095-8649 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1095-8649.1994.tb01092.x |
container_title |
Journal of Fish Biology |
container_volume |
45 |
container_issue |
sa |
container_start_page |
181 |
op_container_end_page |
189 |
_version_ |
1810294373605179392 |