Cohort strength and body size in co-occurring salmonids in a small stream network: variation in space and time
Trout and salmon commonly coexist in stream networks. Exploring similarities and differences among species can help explain coexistence and invasive ability. Here, we describe spatial distribution, cohort strengths and size-at-age of three co-occurring species in a small stream network. Spatial dist...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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2022
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crcansciencepubl:10.1139/cjfas-2020-0418 2023-12-17T10:27:20+01:00 Cohort strength and body size in co-occurring salmonids in a small stream network: variation in space and time Letcher, Benjamin H. Nislow, Keith H. O’Donnell, Matthew J. Whiteley, Andrew R. Coombs, Jason A. Dubreuil, Todd L. 2022 http://dx.doi.org/10.1139/cjfas-2020-0418 https://cdnsciencepub.com/doi/full-xml/10.1139/cjfas-2020-0418 https://cdnsciencepub.com/doi/pdf/10.1139/cjfas-2020-0418 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 79, issue 1, page 133-147 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2022 crcansciencepubl https://doi.org/10.1139/cjfas-2020-0418 2023-11-19T13:39:11Z Trout and salmon commonly coexist in stream networks. Exploring similarities and differences among species can help explain coexistence and invasive ability. Here, we describe spatial distribution, cohort strengths and size-at-age of three co-occurring species in a small stream network. Spatial distributions varied dramatically among species; native brook trout (Salvellinus fontinalis) occupied all stream reaches, naturalized brown trout (Salmo trutta) were found in the mainstem and lower portions of tributaries and fry-stocked Atlantic salmon (Salmo salar) were limited to the mainstem. Size-at-age also differed among species, Atlantic salmon were consistently the smallest, brook trout were intermediate in size and brown trout were the largest. Despite size differences, mean lengths of brook trout and brown trout were highly correlated among years. Cohort strengths varied considerably across years but were also highly correlated for the two trout species, suggesting strong environmental control on cohort strength and a reduced role for species interactions. At low densities, we observed strong negative effects of density on body sizes and weaker effects otherwise. Overall, these results suggest differences in spatial distribution combined with similarities in response to environmental variation contribute to species coexistence in this small steam network. Article in Journal/Newspaper Atlantic salmon Salmo salar Canadian Science Publishing (via Crossref) Canadian Journal of Fisheries and Aquatic Sciences |
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Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Letcher, Benjamin H. Nislow, Keith H. O’Donnell, Matthew J. Whiteley, Andrew R. Coombs, Jason A. Dubreuil, Todd L. Cohort strength and body size in co-occurring salmonids in a small stream network: variation in space and time |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Trout and salmon commonly coexist in stream networks. Exploring similarities and differences among species can help explain coexistence and invasive ability. Here, we describe spatial distribution, cohort strengths and size-at-age of three co-occurring species in a small stream network. Spatial distributions varied dramatically among species; native brook trout (Salvellinus fontinalis) occupied all stream reaches, naturalized brown trout (Salmo trutta) were found in the mainstem and lower portions of tributaries and fry-stocked Atlantic salmon (Salmo salar) were limited to the mainstem. Size-at-age also differed among species, Atlantic salmon were consistently the smallest, brook trout were intermediate in size and brown trout were the largest. Despite size differences, mean lengths of brook trout and brown trout were highly correlated among years. Cohort strengths varied considerably across years but were also highly correlated for the two trout species, suggesting strong environmental control on cohort strength and a reduced role for species interactions. At low densities, we observed strong negative effects of density on body sizes and weaker effects otherwise. Overall, these results suggest differences in spatial distribution combined with similarities in response to environmental variation contribute to species coexistence in this small steam network. |
format |
Article in Journal/Newspaper |
author |
Letcher, Benjamin H. Nislow, Keith H. O’Donnell, Matthew J. Whiteley, Andrew R. Coombs, Jason A. Dubreuil, Todd L. |
author_facet |
Letcher, Benjamin H. Nislow, Keith H. O’Donnell, Matthew J. Whiteley, Andrew R. Coombs, Jason A. Dubreuil, Todd L. |
author_sort |
Letcher, Benjamin H. |
title |
Cohort strength and body size in co-occurring salmonids in a small stream network: variation in space and time |
title_short |
Cohort strength and body size in co-occurring salmonids in a small stream network: variation in space and time |
title_full |
Cohort strength and body size in co-occurring salmonids in a small stream network: variation in space and time |
title_fullStr |
Cohort strength and body size in co-occurring salmonids in a small stream network: variation in space and time |
title_full_unstemmed |
Cohort strength and body size in co-occurring salmonids in a small stream network: variation in space and time |
title_sort |
cohort strength and body size in co-occurring salmonids in a small stream network: variation in space and time |
publisher |
Canadian Science Publishing |
publishDate |
2022 |
url |
http://dx.doi.org/10.1139/cjfas-2020-0418 https://cdnsciencepub.com/doi/full-xml/10.1139/cjfas-2020-0418 https://cdnsciencepub.com/doi/pdf/10.1139/cjfas-2020-0418 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 79, issue 1, page 133-147 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjfas-2020-0418 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
_version_ |
1785579175171588096 |