Notes on the Seaward Migration of Pink and Chum Salmon Fry
The seaward migration of pink and chum salmon fry takes place at night. Strong light is avoided. In pink salmon negative rheotaxis (swimming with a current) is strongly developed and migration is not primarily effected by random swimming and passive displacement. Downstream movement is mainly at or...
Published in: | Journal of the Fisheries Research Board of Canada |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Canadian Science Publishing
1955
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Online Access: | http://dx.doi.org/10.1139/f55-022 http://www.nrcresearchpress.com/doi/pdf/10.1139/f55-022 |
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crcansciencepubl:10.1139/f55-022 2024-03-03T08:47:59+00:00 Notes on the Seaward Migration of Pink and Chum Salmon Fry Neave, Ferris 1955 http://dx.doi.org/10.1139/f55-022 http://www.nrcresearchpress.com/doi/pdf/10.1139/f55-022 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Journal of the Fisheries Research Board of Canada volume 12, issue 3, page 369-374 ISSN 0015-296X journal-article 1955 crcansciencepubl https://doi.org/10.1139/f55-022 2024-02-07T10:53:43Z The seaward migration of pink and chum salmon fry takes place at night. Strong light is avoided. In pink salmon negative rheotaxis (swimming with a current) is strongly developed and migration is not primarily effected by random swimming and passive displacement. Downstream movement is mainly at or close to the surface. In slack water vertical distribution is more uniform. In the shortest streams examined, each night's migrants appeared to reach the sea before daybreak. In a longer stream, fry were seen to bury themselves at the onset of daylight. After being held in fresh water for an undetermined period, fry show positive rheotaxis and schooling behaviour and no longer avoid light. Behaviour of fry after reaching the sea also differs from that shown during actual migration. Changes in behaviour may coincide with commencement of feeding. Article in Journal/Newspaper Pink salmon Canadian Science Publishing Journal of the Fisheries Research Board of Canada 12 3 369 374 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
The seaward migration of pink and chum salmon fry takes place at night. Strong light is avoided. In pink salmon negative rheotaxis (swimming with a current) is strongly developed and migration is not primarily effected by random swimming and passive displacement. Downstream movement is mainly at or close to the surface. In slack water vertical distribution is more uniform. In the shortest streams examined, each night's migrants appeared to reach the sea before daybreak. In a longer stream, fry were seen to bury themselves at the onset of daylight. After being held in fresh water for an undetermined period, fry show positive rheotaxis and schooling behaviour and no longer avoid light. Behaviour of fry after reaching the sea also differs from that shown during actual migration. Changes in behaviour may coincide with commencement of feeding. |
format |
Article in Journal/Newspaper |
author |
Neave, Ferris |
spellingShingle |
Neave, Ferris Notes on the Seaward Migration of Pink and Chum Salmon Fry |
author_facet |
Neave, Ferris |
author_sort |
Neave, Ferris |
title |
Notes on the Seaward Migration of Pink and Chum Salmon Fry |
title_short |
Notes on the Seaward Migration of Pink and Chum Salmon Fry |
title_full |
Notes on the Seaward Migration of Pink and Chum Salmon Fry |
title_fullStr |
Notes on the Seaward Migration of Pink and Chum Salmon Fry |
title_full_unstemmed |
Notes on the Seaward Migration of Pink and Chum Salmon Fry |
title_sort |
notes on the seaward migration of pink and chum salmon fry |
publisher |
Canadian Science Publishing |
publishDate |
1955 |
url |
http://dx.doi.org/10.1139/f55-022 http://www.nrcresearchpress.com/doi/pdf/10.1139/f55-022 |
genre |
Pink salmon |
genre_facet |
Pink salmon |
op_source |
Journal of the Fisheries Research Board of Canada volume 12, issue 3, page 369-374 ISSN 0015-296X |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f55-022 |
container_title |
Journal of the Fisheries Research Board of Canada |
container_volume |
12 |
container_issue |
3 |
container_start_page |
369 |
op_container_end_page |
374 |
_version_ |
1792504305091084288 |