The migratory behaviour of wild Atlantic salmon ( Salmo salar) smolts in the estuary of the River Conwy, North Wales
Thirty-two wild Atlantic salmon (Salmo salar) smolts, tagged with miniature acoustic transmitters, were tracked in the River Conwy, North Wales, to describe the freshwater and estuarine patterns of migration. Migration in fresh water was predominantly nocturnal, although there was a seasonal change...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Canadian Science Publishing
1995
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Online Access: | http://dx.doi.org/10.1139/f95-784 http://www.nrcresearchpress.com/doi/pdf/10.1139/f95-784 |
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crcansciencepubl:10.1139/f95-784 2024-06-23T07:51:19+00:00 The migratory behaviour of wild Atlantic salmon ( Salmo salar) smolts in the estuary of the River Conwy, North Wales Moore, A. Potter, E. C. E. Milner, N. J. Bamber, S. 1995 http://dx.doi.org/10.1139/f95-784 http://www.nrcresearchpress.com/doi/pdf/10.1139/f95-784 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 52, issue 9, page 1923-1935 ISSN 0706-652X 1205-7533 journal-article 1995 crcansciencepubl https://doi.org/10.1139/f95-784 2024-06-06T04:11:18Z Thirty-two wild Atlantic salmon (Salmo salar) smolts, tagged with miniature acoustic transmitters, were tracked in the River Conwy, North Wales, to describe the freshwater and estuarine patterns of migration. Migration in fresh water was predominantly nocturnal, although there was a seasonal change in this pattern with later run fish moving during both the day and night. Smolts tagged earlier in the study spent significantly longer in the river (mean 456 ± 43 h) before migrating into coastal waters than fish tagged later in the study (mean 201 ± 30 h). The movement of smolts through the estuary was indicative of a nocturnal selective ebb tide transport pattern of migration. All of the smolts migrated seawards on an ebb tide close to the surface and within the fastest moving section of the water column. The nocturnal pattern of migration would appear to be the result of an endogenous rhythm of swimming activity that results in the smolts moving up into the water column after dusk and migrating seawards. Smolt migration in the lower portion of the estuary was indicative of active directed swimming and there was no apparent period of acclimation required when moving from fresh to salt water. Article in Journal/Newspaper Atlantic salmon Salmo salar Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 52 9 1923 1935 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
Thirty-two wild Atlantic salmon (Salmo salar) smolts, tagged with miniature acoustic transmitters, were tracked in the River Conwy, North Wales, to describe the freshwater and estuarine patterns of migration. Migration in fresh water was predominantly nocturnal, although there was a seasonal change in this pattern with later run fish moving during both the day and night. Smolts tagged earlier in the study spent significantly longer in the river (mean 456 ± 43 h) before migrating into coastal waters than fish tagged later in the study (mean 201 ± 30 h). The movement of smolts through the estuary was indicative of a nocturnal selective ebb tide transport pattern of migration. All of the smolts migrated seawards on an ebb tide close to the surface and within the fastest moving section of the water column. The nocturnal pattern of migration would appear to be the result of an endogenous rhythm of swimming activity that results in the smolts moving up into the water column after dusk and migrating seawards. Smolt migration in the lower portion of the estuary was indicative of active directed swimming and there was no apparent period of acclimation required when moving from fresh to salt water. |
format |
Article in Journal/Newspaper |
author |
Moore, A. Potter, E. C. E. Milner, N. J. Bamber, S. |
spellingShingle |
Moore, A. Potter, E. C. E. Milner, N. J. Bamber, S. The migratory behaviour of wild Atlantic salmon ( Salmo salar) smolts in the estuary of the River Conwy, North Wales |
author_facet |
Moore, A. Potter, E. C. E. Milner, N. J. Bamber, S. |
author_sort |
Moore, A. |
title |
The migratory behaviour of wild Atlantic salmon ( Salmo salar) smolts in the estuary of the River Conwy, North Wales |
title_short |
The migratory behaviour of wild Atlantic salmon ( Salmo salar) smolts in the estuary of the River Conwy, North Wales |
title_full |
The migratory behaviour of wild Atlantic salmon ( Salmo salar) smolts in the estuary of the River Conwy, North Wales |
title_fullStr |
The migratory behaviour of wild Atlantic salmon ( Salmo salar) smolts in the estuary of the River Conwy, North Wales |
title_full_unstemmed |
The migratory behaviour of wild Atlantic salmon ( Salmo salar) smolts in the estuary of the River Conwy, North Wales |
title_sort |
migratory behaviour of wild atlantic salmon ( salmo salar) smolts in the estuary of the river conwy, north wales |
publisher |
Canadian Science Publishing |
publishDate |
1995 |
url |
http://dx.doi.org/10.1139/f95-784 http://www.nrcresearchpress.com/doi/pdf/10.1139/f95-784 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 52, issue 9, page 1923-1935 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f95-784 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
52 |
container_issue |
9 |
container_start_page |
1923 |
op_container_end_page |
1935 |
_version_ |
1802642365842718720 |