Piscivory and prey selection of four predator species in a whitefish dominated subarctic lake
According to logistic regressions derived for pike Esox lucius and burbot Lota lota , the probability of ingesting fishes in Lake Muddusjärvi, northern Finland, was 50% at 19·3 and 22·1 cm L T , whereas Arctic charr Salvelinus alpinus and brown trout Salmo trutta shifted to piscivory at the lengths...
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crwiley:10.1046/j.1095-8649.2003.00179.x 2024-06-02T08:00:04+00:00 Piscivory and prey selection of four predator species in a whitefish dominated subarctic lake Kahilainen, K. Lehtonen, H. 2003 http://dx.doi.org/10.1046/j.1095-8649.2003.00179.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1095-8649.2003.00179.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1095-8649.2003.00179.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Biology volume 63, issue 3, page 659-672 ISSN 0022-1112 1095-8649 journal-article 2003 crwiley https://doi.org/10.1046/j.1095-8649.2003.00179.x 2024-05-03T12:04:24Z According to logistic regressions derived for pike Esox lucius and burbot Lota lota , the probability of ingesting fishes in Lake Muddusjärvi, northern Finland, was 50% at 19·3 and 22·1 cm L T , whereas Arctic charr Salvelinus alpinus and brown trout Salmo trutta shifted to piscivory at the lengths of 25·7 and 26·4 cm L T . The specialist piscivores, pike and burbot, consumed more prey species and took a wider range of prey sizes than Arctic charr and brown trout. The prey length for all predators increased in relationship to predator length. Whitefish Coregonus lavaretus was the dominant prey species in the lake and in the diet of all the piscivorous species. The whitefish population was divided into three forms, of which the slow‐growing, and the most numerous densely rakered whitefish form (DR), was selected by all predator species. This form also had the smallest average size and widest habitat range, utilizing both pelagic and epibenthic habitats. Two sparsely rakered whitefish forms (LSR and SSR) occupied only epibenthic habitats and had lower relative densities than DR. These forms, LSR and SSR, had a minor importance in the diet of predator species. Article in Journal/Newspaper Arctic charr Arctic Burbot Esox lucius Lota lota Northern Finland Salvelinus alpinus Subarctic lota Wiley Online Library Arctic Muddusjärvi ENVELOPE(26.800,26.800,69.000,69.000) Journal of Fish Biology 63 3 659 672 |
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collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
According to logistic regressions derived for pike Esox lucius and burbot Lota lota , the probability of ingesting fishes in Lake Muddusjärvi, northern Finland, was 50% at 19·3 and 22·1 cm L T , whereas Arctic charr Salvelinus alpinus and brown trout Salmo trutta shifted to piscivory at the lengths of 25·7 and 26·4 cm L T . The specialist piscivores, pike and burbot, consumed more prey species and took a wider range of prey sizes than Arctic charr and brown trout. The prey length for all predators increased in relationship to predator length. Whitefish Coregonus lavaretus was the dominant prey species in the lake and in the diet of all the piscivorous species. The whitefish population was divided into three forms, of which the slow‐growing, and the most numerous densely rakered whitefish form (DR), was selected by all predator species. This form also had the smallest average size and widest habitat range, utilizing both pelagic and epibenthic habitats. Two sparsely rakered whitefish forms (LSR and SSR) occupied only epibenthic habitats and had lower relative densities than DR. These forms, LSR and SSR, had a minor importance in the diet of predator species. |
format |
Article in Journal/Newspaper |
author |
Kahilainen, K. Lehtonen, H. |
spellingShingle |
Kahilainen, K. Lehtonen, H. Piscivory and prey selection of four predator species in a whitefish dominated subarctic lake |
author_facet |
Kahilainen, K. Lehtonen, H. |
author_sort |
Kahilainen, K. |
title |
Piscivory and prey selection of four predator species in a whitefish dominated subarctic lake |
title_short |
Piscivory and prey selection of four predator species in a whitefish dominated subarctic lake |
title_full |
Piscivory and prey selection of four predator species in a whitefish dominated subarctic lake |
title_fullStr |
Piscivory and prey selection of four predator species in a whitefish dominated subarctic lake |
title_full_unstemmed |
Piscivory and prey selection of four predator species in a whitefish dominated subarctic lake |
title_sort |
piscivory and prey selection of four predator species in a whitefish dominated subarctic lake |
publisher |
Wiley |
publishDate |
2003 |
url |
http://dx.doi.org/10.1046/j.1095-8649.2003.00179.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1095-8649.2003.00179.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1095-8649.2003.00179.x |
long_lat |
ENVELOPE(26.800,26.800,69.000,69.000) |
geographic |
Arctic Muddusjärvi |
geographic_facet |
Arctic Muddusjärvi |
genre |
Arctic charr Arctic Burbot Esox lucius Lota lota Northern Finland Salvelinus alpinus Subarctic lota |
genre_facet |
Arctic charr Arctic Burbot Esox lucius Lota lota Northern Finland Salvelinus alpinus Subarctic lota |
op_source |
Journal of Fish Biology volume 63, issue 3, page 659-672 ISSN 0022-1112 1095-8649 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1046/j.1095-8649.2003.00179.x |
container_title |
Journal of Fish Biology |
container_volume |
63 |
container_issue |
3 |
container_start_page |
659 |
op_container_end_page |
672 |
_version_ |
1800744093895098368 |