Low summer temperatures cause juvenile Atlantic salmon to become nocturnal
The diel and seasonal activity patterns of salmonids are predominantly governed by the annual changes in photoperiod and temperature. In winter salmonids become increasingly nocturnal, hiding in refuges by day but emerging to feed at night. This behaviour may be linked to either one of the controlli...
Published in: | Canadian Journal of Zoology |
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Language: | English |
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Canadian Science Publishing
1995
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Online Access: | http://dx.doi.org/10.1139/z95-051 http://www.nrcresearchpress.com/doi/pdf/10.1139/z95-051 |
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crcansciencepubl:10.1139/z95-051 2024-04-07T07:51:10+00:00 Low summer temperatures cause juvenile Atlantic salmon to become nocturnal Fraser, Neil H. C. Metcalfe, Neil B. Heggenes, Jan Thorpe, John E. 1995 http://dx.doi.org/10.1139/z95-051 http://www.nrcresearchpress.com/doi/pdf/10.1139/z95-051 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 73, issue 3, page 446-451 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 1995 crcansciencepubl https://doi.org/10.1139/z95-051 2024-03-08T00:37:48Z The diel and seasonal activity patterns of salmonids are predominantly governed by the annual changes in photoperiod and temperature. In winter salmonids become increasingly nocturnal, hiding in refuges by day but emerging to feed at night. This behaviour may be linked to either one of the controlling influences mentioned above or to an inherent annual rhythm. Here we show that the previously described switch by Altantic salmon (Salmo salar L.) from predominantly diurnal to nocturnal activity in winter also occurs at other times of the year in response to low, "winter" temperatures; this is demonstrated both in laboratory experiments and by field observations in glacial rivers. This indicates that there is no underlying inherent annual rhythm to this behaviour nor any photoperiodic influence. Furthermore, in the laboratory experiment this temperature-dependent shift to nocturnalism was explained by a suppression of daytime activity rather than an increase in activity at night. Article in Journal/Newspaper Atlantic salmon Salmo salar Canadian Science Publishing Canadian Journal of Zoology 73 3 446 451 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics Fraser, Neil H. C. Metcalfe, Neil B. Heggenes, Jan Thorpe, John E. Low summer temperatures cause juvenile Atlantic salmon to become nocturnal |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
The diel and seasonal activity patterns of salmonids are predominantly governed by the annual changes in photoperiod and temperature. In winter salmonids become increasingly nocturnal, hiding in refuges by day but emerging to feed at night. This behaviour may be linked to either one of the controlling influences mentioned above or to an inherent annual rhythm. Here we show that the previously described switch by Altantic salmon (Salmo salar L.) from predominantly diurnal to nocturnal activity in winter also occurs at other times of the year in response to low, "winter" temperatures; this is demonstrated both in laboratory experiments and by field observations in glacial rivers. This indicates that there is no underlying inherent annual rhythm to this behaviour nor any photoperiodic influence. Furthermore, in the laboratory experiment this temperature-dependent shift to nocturnalism was explained by a suppression of daytime activity rather than an increase in activity at night. |
format |
Article in Journal/Newspaper |
author |
Fraser, Neil H. C. Metcalfe, Neil B. Heggenes, Jan Thorpe, John E. |
author_facet |
Fraser, Neil H. C. Metcalfe, Neil B. Heggenes, Jan Thorpe, John E. |
author_sort |
Fraser, Neil H. C. |
title |
Low summer temperatures cause juvenile Atlantic salmon to become nocturnal |
title_short |
Low summer temperatures cause juvenile Atlantic salmon to become nocturnal |
title_full |
Low summer temperatures cause juvenile Atlantic salmon to become nocturnal |
title_fullStr |
Low summer temperatures cause juvenile Atlantic salmon to become nocturnal |
title_full_unstemmed |
Low summer temperatures cause juvenile Atlantic salmon to become nocturnal |
title_sort |
low summer temperatures cause juvenile atlantic salmon to become nocturnal |
publisher |
Canadian Science Publishing |
publishDate |
1995 |
url |
http://dx.doi.org/10.1139/z95-051 http://www.nrcresearchpress.com/doi/pdf/10.1139/z95-051 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Canadian Journal of Zoology volume 73, issue 3, page 446-451 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z95-051 |
container_title |
Canadian Journal of Zoology |
container_volume |
73 |
container_issue |
3 |
container_start_page |
446 |
op_container_end_page |
451 |
_version_ |
1795666036520910848 |