Effect of Photoperiods on the Reactions of Juvenile Atlantic Salmon ( Salmo salar L.) to Light Stimuli
The reactions to light stimuli of juvenile Atlantic salmon exposed to photoperiods (light-exposed fish) and those exposed to control conditions (control fish) were compared. The light-exposed fish showed more activity and reacted more readily to stimuli than the control fish. Both the control and li...
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Canadian Science Publishing
1963
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crcansciencepubl:10.1139/f63-088 2023-12-17T10:27:20+01:00 Effect of Photoperiods on the Reactions of Juvenile Atlantic Salmon ( Salmo salar L.) to Light Stimuli Pinhorn, A. T. Andrews, C. W. 1963 http://dx.doi.org/10.1139/f63-088 http://www.nrcresearchpress.com/doi/pdf/10.1139/f63-088 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Journal of the Fisheries Research Board of Canada volume 20, issue 5, page 1245-1266 ISSN 0015-296X General Medicine journal-article 1963 crcansciencepubl https://doi.org/10.1139/f63-088 2023-11-19T13:38:14Z The reactions to light stimuli of juvenile Atlantic salmon exposed to photoperiods (light-exposed fish) and those exposed to control conditions (control fish) were compared. The light-exposed fish showed more activity and reacted more readily to stimuli than the control fish. Both the control and light-exposed fish exhibited a negative phototaxis at all light intensities except the very lowest where a slight positive phototaxis was obvious. The intensity of an intermittent light stimulus had very little effect on the intensity of the reaction in the light-exposed fish, while the control fish showed an increase in the intensity of the reaction with an increase in the intensity of the light stimulus. The control fish showed an increase in the reaction to the intermittent light stimulus the longer the stimulus was applied at the higher levels of stimulation, while the light-exposed fish showed this behavior at the lower levels of stimulation. The reactions to continuous light were similar to the reactions to intermittent light stimuli, but the light-exposed fish reacted more quickly to continuous light than the control fish. These differences in behavior are attributed to the increased activity and sensitivity of the light-exposed fish, resulting from their exposure to photoperiods. Article in Journal/Newspaper Atlantic salmon Salmo salar Canadian Science Publishing (via Crossref) Journal of the Fisheries Research Board of Canada 20 5 1245 1266 |
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Canadian Science Publishing (via Crossref) |
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crcansciencepubl |
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English |
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General Medicine |
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General Medicine Pinhorn, A. T. Andrews, C. W. Effect of Photoperiods on the Reactions of Juvenile Atlantic Salmon ( Salmo salar L.) to Light Stimuli |
topic_facet |
General Medicine |
description |
The reactions to light stimuli of juvenile Atlantic salmon exposed to photoperiods (light-exposed fish) and those exposed to control conditions (control fish) were compared. The light-exposed fish showed more activity and reacted more readily to stimuli than the control fish. Both the control and light-exposed fish exhibited a negative phototaxis at all light intensities except the very lowest where a slight positive phototaxis was obvious. The intensity of an intermittent light stimulus had very little effect on the intensity of the reaction in the light-exposed fish, while the control fish showed an increase in the intensity of the reaction with an increase in the intensity of the light stimulus. The control fish showed an increase in the reaction to the intermittent light stimulus the longer the stimulus was applied at the higher levels of stimulation, while the light-exposed fish showed this behavior at the lower levels of stimulation. The reactions to continuous light were similar to the reactions to intermittent light stimuli, but the light-exposed fish reacted more quickly to continuous light than the control fish. These differences in behavior are attributed to the increased activity and sensitivity of the light-exposed fish, resulting from their exposure to photoperiods. |
format |
Article in Journal/Newspaper |
author |
Pinhorn, A. T. Andrews, C. W. |
author_facet |
Pinhorn, A. T. Andrews, C. W. |
author_sort |
Pinhorn, A. T. |
title |
Effect of Photoperiods on the Reactions of Juvenile Atlantic Salmon ( Salmo salar L.) to Light Stimuli |
title_short |
Effect of Photoperiods on the Reactions of Juvenile Atlantic Salmon ( Salmo salar L.) to Light Stimuli |
title_full |
Effect of Photoperiods on the Reactions of Juvenile Atlantic Salmon ( Salmo salar L.) to Light Stimuli |
title_fullStr |
Effect of Photoperiods on the Reactions of Juvenile Atlantic Salmon ( Salmo salar L.) to Light Stimuli |
title_full_unstemmed |
Effect of Photoperiods on the Reactions of Juvenile Atlantic Salmon ( Salmo salar L.) to Light Stimuli |
title_sort |
effect of photoperiods on the reactions of juvenile atlantic salmon ( salmo salar l.) to light stimuli |
publisher |
Canadian Science Publishing |
publishDate |
1963 |
url |
http://dx.doi.org/10.1139/f63-088 http://www.nrcresearchpress.com/doi/pdf/10.1139/f63-088 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Journal of the Fisheries Research Board of Canada volume 20, issue 5, page 1245-1266 ISSN 0015-296X |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f63-088 |
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Journal of the Fisheries Research Board of Canada |
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20 |
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5 |
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1245 |
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1266 |
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1785579162657882112 |