Among‐individual diet variation within a lake trout ecotype: Lack of stability of niche use
Abstract In a polyphenic species, differences in resource use are expected among ecotypes, and homogeneity in resource use is expected within an ecotype. Yet, using a broad resource spectrum has been identified as a strategy for fishes living in unproductive northern environments, where food is patc...
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ftdoajarticles:oai:doaj.org/article:b3d78c267b9e4eaa85c19e923664d9d3 2023-05-15T15:08:11+02:00 Among‐individual diet variation within a lake trout ecotype: Lack of stability of niche use Louise Chavarie Kimberly L. Howland Les N. Harris Colin P. Gallagher Michael J. Hansen William M. Tonn Andrew M. Muir Charles C. Krueger 2021-02-01T00:00:00Z https://doi.org/10.1002/ece3.7158 https://doaj.org/article/b3d78c267b9e4eaa85c19e923664d9d3 EN eng Wiley https://doi.org/10.1002/ece3.7158 https://doaj.org/toc/2045-7758 2045-7758 doi:10.1002/ece3.7158 https://doaj.org/article/b3d78c267b9e4eaa85c19e923664d9d3 Ecology and Evolution, Vol 11, Iss 3, Pp 1457-1475 (2021) Arctic fatty acids generalist genetic morphology resource use Ecology QH540-549.5 article 2021 ftdoajarticles https://doi.org/10.1002/ece3.7158 2022-12-31T15:30:04Z Abstract In a polyphenic species, differences in resource use are expected among ecotypes, and homogeneity in resource use is expected within an ecotype. Yet, using a broad resource spectrum has been identified as a strategy for fishes living in unproductive northern environments, where food is patchily distributed and ephemeral. We investigated whether specialization of trophic resources by individuals occurred within the generalist piscivore ecotype of lake trout from Great Bear Lake, Canada, reflective of a form of diversity. Four distinct dietary patterns of resource use within this lake trout ecotype were detected from fatty acid composition, with some variation linked to spatial patterns within Great Bear Lake. Feeding habits of different groups within the ecotype were not associated with detectable morphological or genetic differentiation, suggesting that behavioral plasticity caused the trophic differences. A low level of genetic differentiation was detected between exceptionally large‐sized individuals and other piscivore individuals. We demonstrated that individual trophic specialization can occur within an ecotype inhabiting a geologically young system (8,000–10,000 yr BP), a lake that sustains high levels of phenotypic diversity of lake trout overall. The characterization of niche use among individuals, as done in this study, is necessary to understand the role that individual variation can play at the beginning of differentiation processes. Article in Journal/Newspaper Arctic Great Bear Lake Directory of Open Access Journals: DOAJ Articles Arctic Canada Great Bear Lake ENVELOPE(-120.753,-120.753,65.834,65.834) Ecology and Evolution 11 3 1457 1475 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Arctic fatty acids generalist genetic morphology resource use Ecology QH540-549.5 |
spellingShingle |
Arctic fatty acids generalist genetic morphology resource use Ecology QH540-549.5 Louise Chavarie Kimberly L. Howland Les N. Harris Colin P. Gallagher Michael J. Hansen William M. Tonn Andrew M. Muir Charles C. Krueger Among‐individual diet variation within a lake trout ecotype: Lack of stability of niche use |
topic_facet |
Arctic fatty acids generalist genetic morphology resource use Ecology QH540-549.5 |
description |
Abstract In a polyphenic species, differences in resource use are expected among ecotypes, and homogeneity in resource use is expected within an ecotype. Yet, using a broad resource spectrum has been identified as a strategy for fishes living in unproductive northern environments, where food is patchily distributed and ephemeral. We investigated whether specialization of trophic resources by individuals occurred within the generalist piscivore ecotype of lake trout from Great Bear Lake, Canada, reflective of a form of diversity. Four distinct dietary patterns of resource use within this lake trout ecotype were detected from fatty acid composition, with some variation linked to spatial patterns within Great Bear Lake. Feeding habits of different groups within the ecotype were not associated with detectable morphological or genetic differentiation, suggesting that behavioral plasticity caused the trophic differences. A low level of genetic differentiation was detected between exceptionally large‐sized individuals and other piscivore individuals. We demonstrated that individual trophic specialization can occur within an ecotype inhabiting a geologically young system (8,000–10,000 yr BP), a lake that sustains high levels of phenotypic diversity of lake trout overall. The characterization of niche use among individuals, as done in this study, is necessary to understand the role that individual variation can play at the beginning of differentiation processes. |
format |
Article in Journal/Newspaper |
author |
Louise Chavarie Kimberly L. Howland Les N. Harris Colin P. Gallagher Michael J. Hansen William M. Tonn Andrew M. Muir Charles C. Krueger |
author_facet |
Louise Chavarie Kimberly L. Howland Les N. Harris Colin P. Gallagher Michael J. Hansen William M. Tonn Andrew M. Muir Charles C. Krueger |
author_sort |
Louise Chavarie |
title |
Among‐individual diet variation within a lake trout ecotype: Lack of stability of niche use |
title_short |
Among‐individual diet variation within a lake trout ecotype: Lack of stability of niche use |
title_full |
Among‐individual diet variation within a lake trout ecotype: Lack of stability of niche use |
title_fullStr |
Among‐individual diet variation within a lake trout ecotype: Lack of stability of niche use |
title_full_unstemmed |
Among‐individual diet variation within a lake trout ecotype: Lack of stability of niche use |
title_sort |
among‐individual diet variation within a lake trout ecotype: lack of stability of niche use |
publisher |
Wiley |
publishDate |
2021 |
url |
https://doi.org/10.1002/ece3.7158 https://doaj.org/article/b3d78c267b9e4eaa85c19e923664d9d3 |
long_lat |
ENVELOPE(-120.753,-120.753,65.834,65.834) |
geographic |
Arctic Canada Great Bear Lake |
geographic_facet |
Arctic Canada Great Bear Lake |
genre |
Arctic Great Bear Lake |
genre_facet |
Arctic Great Bear Lake |
op_source |
Ecology and Evolution, Vol 11, Iss 3, Pp 1457-1475 (2021) |
op_relation |
https://doi.org/10.1002/ece3.7158 https://doaj.org/toc/2045-7758 2045-7758 doi:10.1002/ece3.7158 https://doaj.org/article/b3d78c267b9e4eaa85c19e923664d9d3 |
op_doi |
https://doi.org/10.1002/ece3.7158 |
container_title |
Ecology and Evolution |
container_volume |
11 |
container_issue |
3 |
container_start_page |
1457 |
op_container_end_page |
1475 |
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1766339602543542272 |