Atlantic salmon return rate increases with smolt length
International audience Recent declines in Atlantic salmon Salmo salar populations are generally attributed to factors in their marine life-phase. However, it is postulated that factors affecting their freshwater life-phase might impact their marine survival, such as the influence of body size. While...
Published in: | ICES Journal of Marine Science |
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Online Access: | https://institut-agro-rennes-angers.hal.science/hal-02272105 https://institut-agro-rennes-angers.hal.science/hal-02272105/document https://institut-agro-rennes-angers.hal.science/hal-02272105/file/Rivot_2019.pdf https://doi.org/10.1093/icesjms/fsz066 |
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ftagrocampouest:oai:HAL:hal-02272105v1 2024-05-12T08:01:13+00:00 Atlantic salmon return rate increases with smolt length Gregory, Stephen Ibbotson, Anton Riley, William Nevoux, Marie Lauridsen, Rasmus Russell, Ian Britton, J Robert Gillingham, Phillipa Simmons, Olivia Rivot, Etienne Salmo and Trout Research Centre The Game and Wildlife Conservation Trust Centre for Environment, Fisheries and Aquaculture Science Lowestoft (CEFAS) Écologie et santé des écosystèmes (ESE) Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST Bournemouth University Poole (BU) 2019-04-23 https://institut-agro-rennes-angers.hal.science/hal-02272105 https://institut-agro-rennes-angers.hal.science/hal-02272105/document https://institut-agro-rennes-angers.hal.science/hal-02272105/file/Rivot_2019.pdf https://doi.org/10.1093/icesjms/fsz066 en eng HAL CCSD Oxford University Press info:eu-repo/semantics/altIdentifier/doi/10.1093/icesjms/fsz066 hal-02272105 https://institut-agro-rennes-angers.hal.science/hal-02272105 https://institut-agro-rennes-angers.hal.science/hal-02272105/document https://institut-agro-rennes-angers.hal.science/hal-02272105/file/Rivot_2019.pdf doi:10.1093/icesjms/fsz066 PRODINRA: 496384 WOS: 000501732500028 info:eu-repo/semantics/OpenAccess ISSN: 1054-3139 EISSN: 1095-9289 ICES Journal of Marine Science https://institut-agro-rennes-angers.hal.science/hal-02272105 ICES Journal of Marine Science, 2019, 76 (6), pp.1702-1712. ⟨10.1093/icesjms/fsz066⟩ https://academic.oup.com/icesjms/advance-article-abstract/doi/10.1093/icesjms/fsz066/5481490 Atlantic salmon Salmo salar survival smolt body size State-space models restoration effort freshwater life-stages salmonid Bayesian inference size effect marine survival passive integrated transponder (PIT) probability to return as adult juvenile state space model [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.MCG]Environmental Sciences/Global Changes [SDV.SA.STP]Life Sciences [q-bio]/Agricultural sciences/Sciences and technics of fishery info:eu-repo/semantics/article Journal articles 2019 ftagrocampouest https://doi.org/10.1093/icesjms/fsz06610.1093/icesjms/fsz066/5481490 2024-04-17T23:45:21Z International audience Recent declines in Atlantic salmon Salmo salar populations are generally attributed to factors in their marine life-phase. However, it is postulated that factors affecting their freshwater life-phase might impact their marine survival, such as the influence of body size. While larger smolts are widely hypothesized to have higher marine survival rates, empirical support remains scant, in part due to inadequate data and ambiguous statistical analyses. Here, we test the influence of smolt body size on marine return rates, a proxy for marine survival, using a 12-year dataset of 3688 smolts tagged with passive integrated transponders in the River Frome, Southern England. State-space models describe the probability of smolts surviving their marine phase to return as 1 sea-winter (1SW) or multi-sea-winter adults as a function of their length, while accounting for imperfect detection and missing data. Models predicted that larger smolts had higher return rates; the most parsimonious model included the effect of length on 1SW return rate. This prediction is concerning, as freshwater juvenile salmon are decreasing in size on the River Frome, and elsewhere. Thus, to maximize adult returns, restoration efforts should focus on freshwater life-stages, and maximize both the number and the size of emigrating smolts. Article in Journal/Newspaper Atlantic salmon Salmo salar Agrocampus Ouest: HAL ICES Journal of Marine Science 76 6 1702 1712 |
institution |
Open Polar |
collection |
Agrocampus Ouest: HAL |
op_collection_id |
ftagrocampouest |
language |
English |
topic |
Atlantic salmon Salmo salar survival smolt body size State-space models restoration effort freshwater life-stages salmonid Bayesian inference size effect marine survival passive integrated transponder (PIT) probability to return as adult juvenile state space model [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.MCG]Environmental Sciences/Global Changes [SDV.SA.STP]Life Sciences [q-bio]/Agricultural sciences/Sciences and technics of fishery |
spellingShingle |
Atlantic salmon Salmo salar survival smolt body size State-space models restoration effort freshwater life-stages salmonid Bayesian inference size effect marine survival passive integrated transponder (PIT) probability to return as adult juvenile state space model [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.MCG]Environmental Sciences/Global Changes [SDV.SA.STP]Life Sciences [q-bio]/Agricultural sciences/Sciences and technics of fishery Gregory, Stephen Ibbotson, Anton Riley, William Nevoux, Marie Lauridsen, Rasmus Russell, Ian Britton, J Robert Gillingham, Phillipa Simmons, Olivia Rivot, Etienne Atlantic salmon return rate increases with smolt length |
topic_facet |
Atlantic salmon Salmo salar survival smolt body size State-space models restoration effort freshwater life-stages salmonid Bayesian inference size effect marine survival passive integrated transponder (PIT) probability to return as adult juvenile state space model [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.MCG]Environmental Sciences/Global Changes [SDV.SA.STP]Life Sciences [q-bio]/Agricultural sciences/Sciences and technics of fishery |
description |
International audience Recent declines in Atlantic salmon Salmo salar populations are generally attributed to factors in their marine life-phase. However, it is postulated that factors affecting their freshwater life-phase might impact their marine survival, such as the influence of body size. While larger smolts are widely hypothesized to have higher marine survival rates, empirical support remains scant, in part due to inadequate data and ambiguous statistical analyses. Here, we test the influence of smolt body size on marine return rates, a proxy for marine survival, using a 12-year dataset of 3688 smolts tagged with passive integrated transponders in the River Frome, Southern England. State-space models describe the probability of smolts surviving their marine phase to return as 1 sea-winter (1SW) or multi-sea-winter adults as a function of their length, while accounting for imperfect detection and missing data. Models predicted that larger smolts had higher return rates; the most parsimonious model included the effect of length on 1SW return rate. This prediction is concerning, as freshwater juvenile salmon are decreasing in size on the River Frome, and elsewhere. Thus, to maximize adult returns, restoration efforts should focus on freshwater life-stages, and maximize both the number and the size of emigrating smolts. |
author2 |
Salmo and Trout Research Centre The Game and Wildlife Conservation Trust Centre for Environment, Fisheries and Aquaculture Science Lowestoft (CEFAS) Écologie et santé des écosystèmes (ESE) Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST Bournemouth University Poole (BU) |
format |
Article in Journal/Newspaper |
author |
Gregory, Stephen Ibbotson, Anton Riley, William Nevoux, Marie Lauridsen, Rasmus Russell, Ian Britton, J Robert Gillingham, Phillipa Simmons, Olivia Rivot, Etienne |
author_facet |
Gregory, Stephen Ibbotson, Anton Riley, William Nevoux, Marie Lauridsen, Rasmus Russell, Ian Britton, J Robert Gillingham, Phillipa Simmons, Olivia Rivot, Etienne |
author_sort |
Gregory, Stephen |
title |
Atlantic salmon return rate increases with smolt length |
title_short |
Atlantic salmon return rate increases with smolt length |
title_full |
Atlantic salmon return rate increases with smolt length |
title_fullStr |
Atlantic salmon return rate increases with smolt length |
title_full_unstemmed |
Atlantic salmon return rate increases with smolt length |
title_sort |
atlantic salmon return rate increases with smolt length |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://institut-agro-rennes-angers.hal.science/hal-02272105 https://institut-agro-rennes-angers.hal.science/hal-02272105/document https://institut-agro-rennes-angers.hal.science/hal-02272105/file/Rivot_2019.pdf https://doi.org/10.1093/icesjms/fsz066 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
ISSN: 1054-3139 EISSN: 1095-9289 ICES Journal of Marine Science https://institut-agro-rennes-angers.hal.science/hal-02272105 ICES Journal of Marine Science, 2019, 76 (6), pp.1702-1712. ⟨10.1093/icesjms/fsz066⟩ https://academic.oup.com/icesjms/advance-article-abstract/doi/10.1093/icesjms/fsz066/5481490 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1093/icesjms/fsz066 hal-02272105 https://institut-agro-rennes-angers.hal.science/hal-02272105 https://institut-agro-rennes-angers.hal.science/hal-02272105/document https://institut-agro-rennes-angers.hal.science/hal-02272105/file/Rivot_2019.pdf doi:10.1093/icesjms/fsz066 PRODINRA: 496384 WOS: 000501732500028 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1093/icesjms/fsz06610.1093/icesjms/fsz066/5481490 |
container_title |
ICES Journal of Marine Science |
container_volume |
76 |
container_issue |
6 |
container_start_page |
1702 |
op_container_end_page |
1712 |
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1798843334093963264 |