Estuarine survival and migratory behaviour of Atlantic salmon Salmo salar smolts
To estimate mortality rates, assess the spatio‐temporal dynamics of natural mortality and examine migratory behaviour during the fresh to saltwater transition, 185 wild Atlantic salmon Salmo salar smolts were implanted with coded acoustic transmitters. Seaward migration of tagged S. salar from four...
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crwiley:10.1111/j.1095-8649.2012.03419.x 2024-06-02T08:03:34+00:00 Estuarine survival and migratory behaviour of Atlantic salmon Salmo salar smolts Halfyard, E. A. Gibson, A. J. F. Ruzzante, D. E. Stokesbury, M. J. W. Whoriskey, F. G. 2012 http://dx.doi.org/10.1111/j.1095-8649.2012.03419.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.2012.03419.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.2012.03419.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Biology volume 81, issue 5, page 1626-1645 ISSN 0022-1112 1095-8649 journal-article 2012 crwiley https://doi.org/10.1111/j.1095-8649.2012.03419.x 2024-05-03T11:02:05Z To estimate mortality rates, assess the spatio‐temporal dynamics of natural mortality and examine migratory behaviour during the fresh to saltwater transition, 185 wild Atlantic salmon Salmo salar smolts were implanted with coded acoustic transmitters. Seaward migration of tagged S. salar from four river systems in an area of Nova Scotia, Canada known as the Southern Upland was monitored using fixed receivers and active telemetry over 3 years. Cumulative survival through the river, inner estuary, outer estuary and bay habitats averaged 59·6% (range = 39·4–73·5%). When standardized to distance travelled, survival rates followed two patterns: (1) constant rates of survival independent of habitat or (2) low survival most frequently associated with inner estuary habitats. In rivers where survival was independent of habitat, residency periods were also independent of habitat, post‐smolts exhibited few upstream movements, took a more direct route to the ocean and reached the ocean rapidly. Alternatively, in rivers where survival was habitat specific, residency was also habitat specific with overall increased residency, more frequent upstream movements and delayed arrival to the open ocean. The sudden disappearance of most (75–100%) smolts and post‐smolts assumed dead during the course of this study warrants further examination into the role of avian predators as a mortality vector. Article in Journal/Newspaper Atlantic salmon Salmo salar Wiley Online Library Canada Journal of Fish Biology 81 5 1626 1645 |
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Wiley Online Library |
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English |
description |
To estimate mortality rates, assess the spatio‐temporal dynamics of natural mortality and examine migratory behaviour during the fresh to saltwater transition, 185 wild Atlantic salmon Salmo salar smolts were implanted with coded acoustic transmitters. Seaward migration of tagged S. salar from four river systems in an area of Nova Scotia, Canada known as the Southern Upland was monitored using fixed receivers and active telemetry over 3 years. Cumulative survival through the river, inner estuary, outer estuary and bay habitats averaged 59·6% (range = 39·4–73·5%). When standardized to distance travelled, survival rates followed two patterns: (1) constant rates of survival independent of habitat or (2) low survival most frequently associated with inner estuary habitats. In rivers where survival was independent of habitat, residency periods were also independent of habitat, post‐smolts exhibited few upstream movements, took a more direct route to the ocean and reached the ocean rapidly. Alternatively, in rivers where survival was habitat specific, residency was also habitat specific with overall increased residency, more frequent upstream movements and delayed arrival to the open ocean. The sudden disappearance of most (75–100%) smolts and post‐smolts assumed dead during the course of this study warrants further examination into the role of avian predators as a mortality vector. |
format |
Article in Journal/Newspaper |
author |
Halfyard, E. A. Gibson, A. J. F. Ruzzante, D. E. Stokesbury, M. J. W. Whoriskey, F. G. |
spellingShingle |
Halfyard, E. A. Gibson, A. J. F. Ruzzante, D. E. Stokesbury, M. J. W. Whoriskey, F. G. Estuarine survival and migratory behaviour of Atlantic salmon Salmo salar smolts |
author_facet |
Halfyard, E. A. Gibson, A. J. F. Ruzzante, D. E. Stokesbury, M. J. W. Whoriskey, F. G. |
author_sort |
Halfyard, E. A. |
title |
Estuarine survival and migratory behaviour of Atlantic salmon Salmo salar smolts |
title_short |
Estuarine survival and migratory behaviour of Atlantic salmon Salmo salar smolts |
title_full |
Estuarine survival and migratory behaviour of Atlantic salmon Salmo salar smolts |
title_fullStr |
Estuarine survival and migratory behaviour of Atlantic salmon Salmo salar smolts |
title_full_unstemmed |
Estuarine survival and migratory behaviour of Atlantic salmon Salmo salar smolts |
title_sort |
estuarine survival and migratory behaviour of atlantic salmon salmo salar smolts |
publisher |
Wiley |
publishDate |
2012 |
url |
http://dx.doi.org/10.1111/j.1095-8649.2012.03419.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.2012.03419.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.2012.03419.x |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Journal of Fish Biology volume 81, issue 5, page 1626-1645 ISSN 0022-1112 1095-8649 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1095-8649.2012.03419.x |
container_title |
Journal of Fish Biology |
container_volume |
81 |
container_issue |
5 |
container_start_page |
1626 |
op_container_end_page |
1645 |
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1800748121797427200 |