Seasonal Density Dependence in Atlantic Salmon over Varying Spatial Scales
Abstract Scale and ontogeny are important in understanding how various ecological processes structure populations. This is expected to be the case for density‐dependent effects (DDE), which influence the population dynamics of many organisms. Our goal was to evaluate stage‐specific DDE on the growth...
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crwiley:10.1577/t09-121.1 2024-04-28T08:13:20+00:00 Seasonal Density Dependence in Atlantic Salmon over Varying Spatial Scales Bailey, Michael M. Horton, Gregg E. Letcher, Benjamin H. Kinnison, Michael T. 2010 http://dx.doi.org/10.1577/t09-121.1 https://afspubs.onlinelibrary.wiley.com/doi/pdf/10.1577/T09-121.1 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Transactions of the American Fisheries Society volume 139, issue 6, page 1642-1656 ISSN 0002-8487 1548-8659 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2010 crwiley https://doi.org/10.1577/t09-121.1 2024-04-05T07:43:56Z Abstract Scale and ontogeny are important in understanding how various ecological processes structure populations. This is expected to be the case for density‐dependent effects (DDE), which influence the population dynamics of many organisms. Our goal was to evaluate stage‐specific DDE on the growth, movement, and survival of Atlantic salmon Salmo salar from the individual to the group level over varying spatial scales (20–160 m). We used passive integrated transponder tags and associated technology to assess individual growth, survival, and movement histories in a single stream in Maine undergoing restoration efforts via stocking of fry. We studied six life stages over 18 months for four cohorts of presmolt Atlantic salmon. Our findings show that the DDE on growth can be detected at multiple stages well past the young‐of‐the‐year stage in juvenile salmon. We saw a clear development of decreasing DDE on size and growth as cohorts aged. This trend appears to coincide with a tendency for mean fish size to become more variable in low‐density reaches. Density had limited effects on individual movements and mortality during most of juvenile rearing, with such effects largely being confined to the period from spring through fall of the age‐1 year. Shifting the focus of analysis from individuals to group means spanning larger spatial scales had pronounced effects on both the detection of DDE, the magnitude of apparent density effects, and the amount of variation in fish size explained by density. Article in Journal/Newspaper Atlantic salmon Salmo salar Wiley Online Library Transactions of the American Fisheries Society 139 6 1642 1656 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Bailey, Michael M. Horton, Gregg E. Letcher, Benjamin H. Kinnison, Michael T. Seasonal Density Dependence in Atlantic Salmon over Varying Spatial Scales |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Abstract Scale and ontogeny are important in understanding how various ecological processes structure populations. This is expected to be the case for density‐dependent effects (DDE), which influence the population dynamics of many organisms. Our goal was to evaluate stage‐specific DDE on the growth, movement, and survival of Atlantic salmon Salmo salar from the individual to the group level over varying spatial scales (20–160 m). We used passive integrated transponder tags and associated technology to assess individual growth, survival, and movement histories in a single stream in Maine undergoing restoration efforts via stocking of fry. We studied six life stages over 18 months for four cohorts of presmolt Atlantic salmon. Our findings show that the DDE on growth can be detected at multiple stages well past the young‐of‐the‐year stage in juvenile salmon. We saw a clear development of decreasing DDE on size and growth as cohorts aged. This trend appears to coincide with a tendency for mean fish size to become more variable in low‐density reaches. Density had limited effects on individual movements and mortality during most of juvenile rearing, with such effects largely being confined to the period from spring through fall of the age‐1 year. Shifting the focus of analysis from individuals to group means spanning larger spatial scales had pronounced effects on both the detection of DDE, the magnitude of apparent density effects, and the amount of variation in fish size explained by density. |
format |
Article in Journal/Newspaper |
author |
Bailey, Michael M. Horton, Gregg E. Letcher, Benjamin H. Kinnison, Michael T. |
author_facet |
Bailey, Michael M. Horton, Gregg E. Letcher, Benjamin H. Kinnison, Michael T. |
author_sort |
Bailey, Michael M. |
title |
Seasonal Density Dependence in Atlantic Salmon over Varying Spatial Scales |
title_short |
Seasonal Density Dependence in Atlantic Salmon over Varying Spatial Scales |
title_full |
Seasonal Density Dependence in Atlantic Salmon over Varying Spatial Scales |
title_fullStr |
Seasonal Density Dependence in Atlantic Salmon over Varying Spatial Scales |
title_full_unstemmed |
Seasonal Density Dependence in Atlantic Salmon over Varying Spatial Scales |
title_sort |
seasonal density dependence in atlantic salmon over varying spatial scales |
publisher |
Wiley |
publishDate |
2010 |
url |
http://dx.doi.org/10.1577/t09-121.1 https://afspubs.onlinelibrary.wiley.com/doi/pdf/10.1577/T09-121.1 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Transactions of the American Fisheries Society volume 139, issue 6, page 1642-1656 ISSN 0002-8487 1548-8659 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1577/t09-121.1 |
container_title |
Transactions of the American Fisheries Society |
container_volume |
139 |
container_issue |
6 |
container_start_page |
1642 |
op_container_end_page |
1656 |
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1797579886574960640 |