Influence of environmental and biological factors on the overwinter growth rate of Atlantic salmon Salmo salar parr in a UK chalk stream
Abstract Smolt lengths are increasingly recognised as an important determinant of salmonid marine survival rates. Overwintering growth rates could thus strongly influence adult return rates. In Atlantic salmon Salmo salar , most overwintering studies focus on rivers in harsh climates with minimal gr...
Published in: | Ecology of Freshwater Fish |
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crwiley:10.1111/eff.12542 2024-06-02T08:03:32+00:00 Influence of environmental and biological factors on the overwinter growth rate of Atlantic salmon Salmo salar parr in a UK chalk stream Simmons, Olivia M. Britton, John Robert Gillingham, Phillipa K. Gregory, Stephen D. Bournemouth University European Regional Development Fund 2020 http://dx.doi.org/10.1111/eff.12542 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Feff.12542 https://onlinelibrary.wiley.com/doi/pdf/10.1111/eff.12542 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/eff.12542 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Ecology of Freshwater Fish volume 29, issue 4, page 665-678 ISSN 0906-6691 1600-0633 journal-article 2020 crwiley https://doi.org/10.1111/eff.12542 2024-05-03T11:37:19Z Abstract Smolt lengths are increasingly recognised as an important determinant of salmonid marine survival rates. Overwintering growth rates could thus strongly influence adult return rates. In Atlantic salmon Salmo salar , most overwintering studies focus on rivers in harsh climates with minimal growth, yet in more southerly rivers, overwintering growth rates can be relatively high. Here, the factors influencing annual overwinter growth rates were tested for juvenile S. salar in a temperate chalk stream in southern England over 13 years, where over 10,000 salmon parr were tagged annually in autumn and a proportion recaptured the following spring during smolt emigration. Winters of higher and more variable water temperatures, with longer periods of high flows, showed increased overwintering growth rates. Faster growth rates were recorded from sites further upstream and that had lower parr densities; smaller individuals also grew more than expected for their initial size. These results suggest that a range of factors influences overwintering salmonid growth rates and can be used to inform management decisions to maximise the quality of emigrating smolts. Article in Journal/Newspaper Atlantic salmon Salmo salar Wiley Online Library Ecology of Freshwater Fish 29 4 665 678 |
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Wiley Online Library |
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language |
English |
description |
Abstract Smolt lengths are increasingly recognised as an important determinant of salmonid marine survival rates. Overwintering growth rates could thus strongly influence adult return rates. In Atlantic salmon Salmo salar , most overwintering studies focus on rivers in harsh climates with minimal growth, yet in more southerly rivers, overwintering growth rates can be relatively high. Here, the factors influencing annual overwinter growth rates were tested for juvenile S. salar in a temperate chalk stream in southern England over 13 years, where over 10,000 salmon parr were tagged annually in autumn and a proportion recaptured the following spring during smolt emigration. Winters of higher and more variable water temperatures, with longer periods of high flows, showed increased overwintering growth rates. Faster growth rates were recorded from sites further upstream and that had lower parr densities; smaller individuals also grew more than expected for their initial size. These results suggest that a range of factors influences overwintering salmonid growth rates and can be used to inform management decisions to maximise the quality of emigrating smolts. |
author2 |
Bournemouth University European Regional Development Fund |
format |
Article in Journal/Newspaper |
author |
Simmons, Olivia M. Britton, John Robert Gillingham, Phillipa K. Gregory, Stephen D. |
spellingShingle |
Simmons, Olivia M. Britton, John Robert Gillingham, Phillipa K. Gregory, Stephen D. Influence of environmental and biological factors on the overwinter growth rate of Atlantic salmon Salmo salar parr in a UK chalk stream |
author_facet |
Simmons, Olivia M. Britton, John Robert Gillingham, Phillipa K. Gregory, Stephen D. |
author_sort |
Simmons, Olivia M. |
title |
Influence of environmental and biological factors on the overwinter growth rate of Atlantic salmon Salmo salar parr in a UK chalk stream |
title_short |
Influence of environmental and biological factors on the overwinter growth rate of Atlantic salmon Salmo salar parr in a UK chalk stream |
title_full |
Influence of environmental and biological factors on the overwinter growth rate of Atlantic salmon Salmo salar parr in a UK chalk stream |
title_fullStr |
Influence of environmental and biological factors on the overwinter growth rate of Atlantic salmon Salmo salar parr in a UK chalk stream |
title_full_unstemmed |
Influence of environmental and biological factors on the overwinter growth rate of Atlantic salmon Salmo salar parr in a UK chalk stream |
title_sort |
influence of environmental and biological factors on the overwinter growth rate of atlantic salmon salmo salar parr in a uk chalk stream |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1111/eff.12542 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Feff.12542 https://onlinelibrary.wiley.com/doi/pdf/10.1111/eff.12542 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/eff.12542 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Ecology of Freshwater Fish volume 29, issue 4, page 665-678 ISSN 0906-6691 1600-0633 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/eff.12542 |
container_title |
Ecology of Freshwater Fish |
container_volume |
29 |
container_issue |
4 |
container_start_page |
665 |
op_container_end_page |
678 |
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1800748076211634176 |