Population variation in density‐dependent growth, mortality and their trade‐off in a stream fish
Abstract Important variation in the shape and strength of density‐dependent growth and mortality is observed across animal populations. Understanding this population variation is critical for predicting density‐dependent relationships in natural populations, but comparisons amongst studies are chall...
Published in: | Journal of Animal Ecology |
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crwiley:10.1111/1365-2656.13124 2024-06-23T07:54:48+00:00 Population variation in density‐dependent growth, mortality and their trade‐off in a stream fish Matte, Jean‐Michel Fraser, Dylan J. Grant, James W. A. Street, Garrett Natural Sciences and Engineering Research Council of Canada 2019 http://dx.doi.org/10.1111/1365-2656.13124 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2656.13124 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/1365-2656.13124 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2656.13124 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Animal Ecology volume 89, issue 2, page 541-552 ISSN 0021-8790 1365-2656 journal-article 2019 crwiley https://doi.org/10.1111/1365-2656.13124 2024-06-04T06:42:04Z Abstract Important variation in the shape and strength of density‐dependent growth and mortality is observed across animal populations. Understanding this population variation is critical for predicting density‐dependent relationships in natural populations, but comparisons amongst studies are challenging as studies differ in methodologies and in local environmental conditions. Consequently, it is unclear whether: (a) the shape and strength of density‐dependent growth and mortality are population‐specific; (b) the potential trade‐off between density‐dependent growth and mortality differs amongst populations; and (c) environmental characteristics can be related to population differences in density‐dependent relationships. To elucidate these uncertainties, we manipulated the density (0.3–7 fish/ ) of young‐of‐the‐year brook trout ( Salvelinus fontinalis ) simultaneously in three neighbouring populations in a field experiment in Newfoundland, Canada. Within each population, our experiment included both spatial (three sites per stream) and temporal (three consecutive summers) replication. We detected temporally consistent population variation in the shape of density‐dependent growth (negative linear and negative logarithmic), but not for mortality (positive logarithmic). The strength of density‐dependent growth across populations was reduced in sections with a high percentage of boulder substrate, whereas density‐dependent mortality increased with increasing flow, water temperature and more acidic pH. Neighbouring populations exhibited different mortality‐growth trade‐offs: the ratio of mortality‐to‐growth increased linearly with increasing density at different rates across populations (up to 4‐fold differences), but also increased with increasing temperature. Our results are some of the first to demonstrate temporally consistent, population‐specific density‐dependent relationships and trade‐offs at small spatial scales that match the magnitude of interspecific variation observed across the globe. Furthermore, key ... Article in Journal/Newspaper Newfoundland Wiley Online Library Canada Journal of Animal Ecology 89 2 541 552 |
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Abstract Important variation in the shape and strength of density‐dependent growth and mortality is observed across animal populations. Understanding this population variation is critical for predicting density‐dependent relationships in natural populations, but comparisons amongst studies are challenging as studies differ in methodologies and in local environmental conditions. Consequently, it is unclear whether: (a) the shape and strength of density‐dependent growth and mortality are population‐specific; (b) the potential trade‐off between density‐dependent growth and mortality differs amongst populations; and (c) environmental characteristics can be related to population differences in density‐dependent relationships. To elucidate these uncertainties, we manipulated the density (0.3–7 fish/ ) of young‐of‐the‐year brook trout ( Salvelinus fontinalis ) simultaneously in three neighbouring populations in a field experiment in Newfoundland, Canada. Within each population, our experiment included both spatial (three sites per stream) and temporal (three consecutive summers) replication. We detected temporally consistent population variation in the shape of density‐dependent growth (negative linear and negative logarithmic), but not for mortality (positive logarithmic). The strength of density‐dependent growth across populations was reduced in sections with a high percentage of boulder substrate, whereas density‐dependent mortality increased with increasing flow, water temperature and more acidic pH. Neighbouring populations exhibited different mortality‐growth trade‐offs: the ratio of mortality‐to‐growth increased linearly with increasing density at different rates across populations (up to 4‐fold differences), but also increased with increasing temperature. Our results are some of the first to demonstrate temporally consistent, population‐specific density‐dependent relationships and trade‐offs at small spatial scales that match the magnitude of interspecific variation observed across the globe. Furthermore, key ... |
author2 |
Street, Garrett Natural Sciences and Engineering Research Council of Canada |
format |
Article in Journal/Newspaper |
author |
Matte, Jean‐Michel Fraser, Dylan J. Grant, James W. A. |
spellingShingle |
Matte, Jean‐Michel Fraser, Dylan J. Grant, James W. A. Population variation in density‐dependent growth, mortality and their trade‐off in a stream fish |
author_facet |
Matte, Jean‐Michel Fraser, Dylan J. Grant, James W. A. |
author_sort |
Matte, Jean‐Michel |
title |
Population variation in density‐dependent growth, mortality and their trade‐off in a stream fish |
title_short |
Population variation in density‐dependent growth, mortality and their trade‐off in a stream fish |
title_full |
Population variation in density‐dependent growth, mortality and their trade‐off in a stream fish |
title_fullStr |
Population variation in density‐dependent growth, mortality and their trade‐off in a stream fish |
title_full_unstemmed |
Population variation in density‐dependent growth, mortality and their trade‐off in a stream fish |
title_sort |
population variation in density‐dependent growth, mortality and their trade‐off in a stream fish |
publisher |
Wiley |
publishDate |
2019 |
url |
http://dx.doi.org/10.1111/1365-2656.13124 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2656.13124 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/1365-2656.13124 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2656.13124 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
Journal of Animal Ecology volume 89, issue 2, page 541-552 ISSN 0021-8790 1365-2656 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/1365-2656.13124 |
container_title |
Journal of Animal Ecology |
container_volume |
89 |
container_issue |
2 |
container_start_page |
541 |
op_container_end_page |
552 |
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1802647071753240576 |