Tidal gradients, fine‐scale homing and a potential cryptic ecotype of wild spawning pink salmon ( Oncorhynchus gorbuscha)
Abstract The homing behaviour of salmon is a remarkable natural phenomenon, critical for shaping the ecology and evolution of populations yet the spatial scale at which it occurs is poorly understood. This study investigated the spatial scale and mechanisms driving homing as depicted by spawning sit...
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Online Access: | http://dx.doi.org/10.1111/mec.17154 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mec.17154 |
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crwiley:10.1111/mec.17154 2024-09-15T18:28:40+00:00 Tidal gradients, fine‐scale homing and a potential cryptic ecotype of wild spawning pink salmon ( Oncorhynchus gorbuscha) May, Samuel A. Shedd, Kyle R. Rand, Peter S. Westley, Peter A. H. Alaska Fisheries Science Center North Pacific Research Board 2023 http://dx.doi.org/10.1111/mec.17154 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mec.17154 en eng Wiley http://creativecommons.org/licenses/by-nc/4.0/ http://creativecommons.org/licenses/by-nc/4.0/ Molecular Ecology volume 32, issue 21, page 5838-5848 ISSN 0962-1083 1365-294X journal-article 2023 crwiley https://doi.org/10.1111/mec.17154 2024-07-09T04:09:29Z Abstract The homing behaviour of salmon is a remarkable natural phenomenon, critical for shaping the ecology and evolution of populations yet the spatial scale at which it occurs is poorly understood. This study investigated the spatial scale and mechanisms driving homing as depicted by spawning site‐choice behaviour in pink salmon ( Oncorhynchus gorbuscha ) in Prince William Sound, Alaska. Molecular pedigree analyses of over 30,000 adult spawners in four streams revealed that pink salmon exhibit fine‐scale site fidelity within a stream, returning to within <100 m of their parents. Homing behaviours were driven in part by a salinity gradient between intertidal and freshwater environments, with individuals incubated in freshwater environments more than twice as likely to spawn upstream of tidal influence than those incubated in the intertidal. Our findings challenge the traditional view that pink salmon populations are genetically and phenotypically homogenous due to their short freshwater residency as juveniles and high rates of dispersal as returning adults (i.e. straying). This study has important implications for rates of inbreeding, local adaptation and gene flow within populations, and is particularly relevant to the management of salmon hatcheries, given the high incidence of hatchery‐origin pink salmon, reared in freshwater hatchery environments, that stray into wild populations of Prince William Sound. Article in Journal/Newspaper Oncorhynchus gorbuscha Pink salmon Alaska Wiley Online Library Molecular Ecology 32 21 5838 5848 |
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English |
description |
Abstract The homing behaviour of salmon is a remarkable natural phenomenon, critical for shaping the ecology and evolution of populations yet the spatial scale at which it occurs is poorly understood. This study investigated the spatial scale and mechanisms driving homing as depicted by spawning site‐choice behaviour in pink salmon ( Oncorhynchus gorbuscha ) in Prince William Sound, Alaska. Molecular pedigree analyses of over 30,000 adult spawners in four streams revealed that pink salmon exhibit fine‐scale site fidelity within a stream, returning to within <100 m of their parents. Homing behaviours were driven in part by a salinity gradient between intertidal and freshwater environments, with individuals incubated in freshwater environments more than twice as likely to spawn upstream of tidal influence than those incubated in the intertidal. Our findings challenge the traditional view that pink salmon populations are genetically and phenotypically homogenous due to their short freshwater residency as juveniles and high rates of dispersal as returning adults (i.e. straying). This study has important implications for rates of inbreeding, local adaptation and gene flow within populations, and is particularly relevant to the management of salmon hatcheries, given the high incidence of hatchery‐origin pink salmon, reared in freshwater hatchery environments, that stray into wild populations of Prince William Sound. |
author2 |
Alaska Fisheries Science Center North Pacific Research Board |
format |
Article in Journal/Newspaper |
author |
May, Samuel A. Shedd, Kyle R. Rand, Peter S. Westley, Peter A. H. |
spellingShingle |
May, Samuel A. Shedd, Kyle R. Rand, Peter S. Westley, Peter A. H. Tidal gradients, fine‐scale homing and a potential cryptic ecotype of wild spawning pink salmon ( Oncorhynchus gorbuscha) |
author_facet |
May, Samuel A. Shedd, Kyle R. Rand, Peter S. Westley, Peter A. H. |
author_sort |
May, Samuel A. |
title |
Tidal gradients, fine‐scale homing and a potential cryptic ecotype of wild spawning pink salmon ( Oncorhynchus gorbuscha) |
title_short |
Tidal gradients, fine‐scale homing and a potential cryptic ecotype of wild spawning pink salmon ( Oncorhynchus gorbuscha) |
title_full |
Tidal gradients, fine‐scale homing and a potential cryptic ecotype of wild spawning pink salmon ( Oncorhynchus gorbuscha) |
title_fullStr |
Tidal gradients, fine‐scale homing and a potential cryptic ecotype of wild spawning pink salmon ( Oncorhynchus gorbuscha) |
title_full_unstemmed |
Tidal gradients, fine‐scale homing and a potential cryptic ecotype of wild spawning pink salmon ( Oncorhynchus gorbuscha) |
title_sort |
tidal gradients, fine‐scale homing and a potential cryptic ecotype of wild spawning pink salmon ( oncorhynchus gorbuscha) |
publisher |
Wiley |
publishDate |
2023 |
url |
http://dx.doi.org/10.1111/mec.17154 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mec.17154 |
genre |
Oncorhynchus gorbuscha Pink salmon Alaska |
genre_facet |
Oncorhynchus gorbuscha Pink salmon Alaska |
op_source |
Molecular Ecology volume 32, issue 21, page 5838-5848 ISSN 0962-1083 1365-294X |
op_rights |
http://creativecommons.org/licenses/by-nc/4.0/ http://creativecommons.org/licenses/by-nc/4.0/ |
op_doi |
https://doi.org/10.1111/mec.17154 |
container_title |
Molecular Ecology |
container_volume |
32 |
container_issue |
21 |
container_start_page |
5838 |
op_container_end_page |
5848 |
_version_ |
1810470133685026816 |