Human influence on brown trout juvenile body size during metapopulation expansion
Change in body size can be driven by social (density) and non-social (environmental and spatial variation) factors. In expanding metapopulations, spatial sorting by means of dispersal on the expansion front can further drive the evolution of body size. However, human intervention can dramatically af...
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crroyalsociety:10.1098/rsbl.2021.0366 2024-06-02T08:09:48+00:00 Human influence on brown trout juvenile body size during metapopulation expansion Aulus-Giacosa, L. Guéraud, F. Gaudin, P. Buoro, M. Aymes, J. C. Labonne, J. Vignon, M. 2021 http://dx.doi.org/10.1098/rsbl.2021.0366 https://royalsocietypublishing.org/doi/pdf/10.1098/rsbl.2021.0366 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsbl.2021.0366 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Biology Letters volume 17, issue 10 ISSN 1744-957X journal-article 2021 crroyalsociety https://doi.org/10.1098/rsbl.2021.0366 2024-05-07T14:16:13Z Change in body size can be driven by social (density) and non-social (environmental and spatial variation) factors. In expanding metapopulations, spatial sorting by means of dispersal on the expansion front can further drive the evolution of body size. However, human intervention can dramatically affect these founder effects. Using long-term monitoring of the colonization of the remote Kerguelen islands by brown trout, a facultative anadromous salmonid, we analyse body size variation in 32 naturally founded and 10 human-introduced populations over 57 years. In naturally founded populations, we find that spatial sorting promotes slow positive changes in body size on the expansion front, then that body size decreases as populations get older and local density increases. This pattern is, however, completely different in human-introduced populations, where body size remains constant or even increases as populations get older. The present findings confirm that changes in body size can be affected by metapopulation expansion, but that human influence, even in very remote environments, can fully alter this process. Article in Journal/Newspaper Kerguelen Islands The Royal Society Kerguelen Kerguelen Islands Biology Letters 17 10 |
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Open Polar |
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The Royal Society |
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crroyalsociety |
language |
English |
description |
Change in body size can be driven by social (density) and non-social (environmental and spatial variation) factors. In expanding metapopulations, spatial sorting by means of dispersal on the expansion front can further drive the evolution of body size. However, human intervention can dramatically affect these founder effects. Using long-term monitoring of the colonization of the remote Kerguelen islands by brown trout, a facultative anadromous salmonid, we analyse body size variation in 32 naturally founded and 10 human-introduced populations over 57 years. In naturally founded populations, we find that spatial sorting promotes slow positive changes in body size on the expansion front, then that body size decreases as populations get older and local density increases. This pattern is, however, completely different in human-introduced populations, where body size remains constant or even increases as populations get older. The present findings confirm that changes in body size can be affected by metapopulation expansion, but that human influence, even in very remote environments, can fully alter this process. |
format |
Article in Journal/Newspaper |
author |
Aulus-Giacosa, L. Guéraud, F. Gaudin, P. Buoro, M. Aymes, J. C. Labonne, J. Vignon, M. |
spellingShingle |
Aulus-Giacosa, L. Guéraud, F. Gaudin, P. Buoro, M. Aymes, J. C. Labonne, J. Vignon, M. Human influence on brown trout juvenile body size during metapopulation expansion |
author_facet |
Aulus-Giacosa, L. Guéraud, F. Gaudin, P. Buoro, M. Aymes, J. C. Labonne, J. Vignon, M. |
author_sort |
Aulus-Giacosa, L. |
title |
Human influence on brown trout juvenile body size during metapopulation expansion |
title_short |
Human influence on brown trout juvenile body size during metapopulation expansion |
title_full |
Human influence on brown trout juvenile body size during metapopulation expansion |
title_fullStr |
Human influence on brown trout juvenile body size during metapopulation expansion |
title_full_unstemmed |
Human influence on brown trout juvenile body size during metapopulation expansion |
title_sort |
human influence on brown trout juvenile body size during metapopulation expansion |
publisher |
The Royal Society |
publishDate |
2021 |
url |
http://dx.doi.org/10.1098/rsbl.2021.0366 https://royalsocietypublishing.org/doi/pdf/10.1098/rsbl.2021.0366 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsbl.2021.0366 |
geographic |
Kerguelen Kerguelen Islands |
geographic_facet |
Kerguelen Kerguelen Islands |
genre |
Kerguelen Islands |
genre_facet |
Kerguelen Islands |
op_source |
Biology Letters volume 17, issue 10 ISSN 1744-957X |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rsbl.2021.0366 |
container_title |
Biology Letters |
container_volume |
17 |
container_issue |
10 |
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1800755579368505344 |