Density‐dependent territory size and individual growth rate in juvenile Atlantic salmon ( Salmo salar)
Abstract Whether territoriality regulates population size depends on the flexibility of territory size, but few studies have quantified territory size over a broad range of densities. While juvenile salmonids in streams exhibit density‐dependent mortality and emigration, consistent with space limita...
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crwiley:10.1111/eff.12120 2024-09-15T17:56:13+00:00 Density‐dependent territory size and individual growth rate in juvenile Atlantic salmon ( Salmo salar) Lindeman, Amanda A. Grant, James W. A. Desjardins, Cyndy M. Natural Sciences and Engineering Research Council of Canada 2014 http://dx.doi.org/10.1111/eff.12120 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Feff.12120 https://onlinelibrary.wiley.com/doi/pdf/10.1111/eff.12120 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Ecology of Freshwater Fish volume 24, issue 1, page 15-22 ISSN 0906-6691 1600-0633 journal-article 2014 crwiley https://doi.org/10.1111/eff.12120 2024-08-22T04:17:07Z Abstract Whether territoriality regulates population size depends on the flexibility of territory size, but few studies have quantified territory size over a broad range of densities. While juvenile salmonids in streams exhibit density‐dependent mortality and emigration, consistent with space limitation, there has been relatively little study of how territory size and individual growth rate change over a broad range of densities, particularly in field experiments. Consequently, we manipulated the density (range = 0.25–8 m −2 ) of young‐of‐the‐year ( YOY ) Atlantic salmon ( Salmo salar ) in mesh enclosures erected in a natural stream to test whether (i) territory size is fixed, decreases continuously or decreases towards an asymptotic minimum size as density increases; and (ii) individual growth rate decreases as a negative power curve with density as in observational field studies. Territory size decreased with increasing density, consistent with an asymptotic minimum size of about 0.13 m 2 for a 5‐cm fish. Individual growth rate also decreased with density, although the magnitude of decrease was steeper than in observational studies. Our results suggest a limit to how small territories can be compressed, which will set the upper limit to the local density in a habitat. The density‐dependent changes in territory size and individual growth rate will both play a role in the regulation of stream salmonid populations. Article in Journal/Newspaper Atlantic salmon Salmo salar Wiley Online Library Ecology of Freshwater Fish 24 1 15 22 |
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English |
description |
Abstract Whether territoriality regulates population size depends on the flexibility of territory size, but few studies have quantified territory size over a broad range of densities. While juvenile salmonids in streams exhibit density‐dependent mortality and emigration, consistent with space limitation, there has been relatively little study of how territory size and individual growth rate change over a broad range of densities, particularly in field experiments. Consequently, we manipulated the density (range = 0.25–8 m −2 ) of young‐of‐the‐year ( YOY ) Atlantic salmon ( Salmo salar ) in mesh enclosures erected in a natural stream to test whether (i) territory size is fixed, decreases continuously or decreases towards an asymptotic minimum size as density increases; and (ii) individual growth rate decreases as a negative power curve with density as in observational field studies. Territory size decreased with increasing density, consistent with an asymptotic minimum size of about 0.13 m 2 for a 5‐cm fish. Individual growth rate also decreased with density, although the magnitude of decrease was steeper than in observational studies. Our results suggest a limit to how small territories can be compressed, which will set the upper limit to the local density in a habitat. The density‐dependent changes in territory size and individual growth rate will both play a role in the regulation of stream salmonid populations. |
author2 |
Natural Sciences and Engineering Research Council of Canada |
format |
Article in Journal/Newspaper |
author |
Lindeman, Amanda A. Grant, James W. A. Desjardins, Cyndy M. |
spellingShingle |
Lindeman, Amanda A. Grant, James W. A. Desjardins, Cyndy M. Density‐dependent territory size and individual growth rate in juvenile Atlantic salmon ( Salmo salar) |
author_facet |
Lindeman, Amanda A. Grant, James W. A. Desjardins, Cyndy M. |
author_sort |
Lindeman, Amanda A. |
title |
Density‐dependent territory size and individual growth rate in juvenile Atlantic salmon ( Salmo salar) |
title_short |
Density‐dependent territory size and individual growth rate in juvenile Atlantic salmon ( Salmo salar) |
title_full |
Density‐dependent territory size and individual growth rate in juvenile Atlantic salmon ( Salmo salar) |
title_fullStr |
Density‐dependent territory size and individual growth rate in juvenile Atlantic salmon ( Salmo salar) |
title_full_unstemmed |
Density‐dependent territory size and individual growth rate in juvenile Atlantic salmon ( Salmo salar) |
title_sort |
density‐dependent territory size and individual growth rate in juvenile atlantic salmon ( salmo salar) |
publisher |
Wiley |
publishDate |
2014 |
url |
http://dx.doi.org/10.1111/eff.12120 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Feff.12120 https://onlinelibrary.wiley.com/doi/pdf/10.1111/eff.12120 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Ecology of Freshwater Fish volume 24, issue 1, page 15-22 ISSN 0906-6691 1600-0633 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/eff.12120 |
container_title |
Ecology of Freshwater Fish |
container_volume |
24 |
container_issue |
1 |
container_start_page |
15 |
op_container_end_page |
22 |
_version_ |
1810432436878704640 |