Temporal variations in daily patterns of swimming activity and vertical distribution in juvenile pink salmon ( Oncorhynchus gorbuscha )
At times corresponding to their juvenile coastal and pelagic ocean phases, groups of juvenile pink salmon exhibited diel rhythms of generally diurnal swimming activity and nocturnal vertical movement in response to simulated seasonal variations in photoperiod and water temperature in the laboratory....
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Canadian Science Publishing
1984
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Online Access: | http://dx.doi.org/10.1139/z84-013 http://www.nrcresearchpress.com/doi/pdf/10.1139/z84-013 |
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crcansciencepubl:10.1139/z84-013 2023-12-17T10:48:11+01:00 Temporal variations in daily patterns of swimming activity and vertical distribution in juvenile pink salmon ( Oncorhynchus gorbuscha ) Godin, Jean-Guy J. 1984 http://dx.doi.org/10.1139/z84-013 http://www.nrcresearchpress.com/doi/pdf/10.1139/z84-013 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 62, issue 1, page 72-79 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 1984 crcansciencepubl https://doi.org/10.1139/z84-013 2023-11-19T13:38:55Z At times corresponding to their juvenile coastal and pelagic ocean phases, groups of juvenile pink salmon exhibited diel rhythms of generally diurnal swimming activity and nocturnal vertical movement in response to simulated seasonal variations in photoperiod and water temperature in the laboratory. Diurnal swimming activity was synchronized with the daily light cycle throughout most of the year, but not with ambient daily temperature cycles. On average, fish were increasingly more active during the day than at night with increasing duration of the photophase. Relative swimming speed also increased with increasing photophase duration, and was not affected by seasonal changes in temperature. The fish always showed a greater tendency to swim in the upper half of the water column during the night than during the day. This rhythm of vertical distribution was more strongly synchronized with the daily light cycle in winter than during any other season. Daily temperature cycles did not synchronize these distribution patterns. No significant seasonal trend was noted in mean levels or mean indices of vertical distribution. Results are related to the migratory behaviour of pink salmon, and it is concluded that photoperiod may be an important proximate factor in the timing of their seasonal migratory behaviour. Article in Journal/Newspaper Oncorhynchus gorbuscha Pink salmon Canadian Science Publishing (via Crossref) Canadian Journal of Zoology 62 1 72 79 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
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 Godin, Jean-Guy J. Temporal variations in daily patterns of swimming activity and vertical distribution in juvenile pink salmon ( Oncorhynchus gorbuscha ) |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
At times corresponding to their juvenile coastal and pelagic ocean phases, groups of juvenile pink salmon exhibited diel rhythms of generally diurnal swimming activity and nocturnal vertical movement in response to simulated seasonal variations in photoperiod and water temperature in the laboratory. Diurnal swimming activity was synchronized with the daily light cycle throughout most of the year, but not with ambient daily temperature cycles. On average, fish were increasingly more active during the day than at night with increasing duration of the photophase. Relative swimming speed also increased with increasing photophase duration, and was not affected by seasonal changes in temperature. The fish always showed a greater tendency to swim in the upper half of the water column during the night than during the day. This rhythm of vertical distribution was more strongly synchronized with the daily light cycle in winter than during any other season. Daily temperature cycles did not synchronize these distribution patterns. No significant seasonal trend was noted in mean levels or mean indices of vertical distribution. Results are related to the migratory behaviour of pink salmon, and it is concluded that photoperiod may be an important proximate factor in the timing of their seasonal migratory behaviour. |
format |
Article in Journal/Newspaper |
author |
Godin, Jean-Guy J. |
author_facet |
Godin, Jean-Guy J. |
author_sort |
Godin, Jean-Guy J. |
title |
Temporal variations in daily patterns of swimming activity and vertical distribution in juvenile pink salmon ( Oncorhynchus gorbuscha ) |
title_short |
Temporal variations in daily patterns of swimming activity and vertical distribution in juvenile pink salmon ( Oncorhynchus gorbuscha ) |
title_full |
Temporal variations in daily patterns of swimming activity and vertical distribution in juvenile pink salmon ( Oncorhynchus gorbuscha ) |
title_fullStr |
Temporal variations in daily patterns of swimming activity and vertical distribution in juvenile pink salmon ( Oncorhynchus gorbuscha ) |
title_full_unstemmed |
Temporal variations in daily patterns of swimming activity and vertical distribution in juvenile pink salmon ( Oncorhynchus gorbuscha ) |
title_sort |
temporal variations in daily patterns of swimming activity and vertical distribution in juvenile pink salmon ( oncorhynchus gorbuscha ) |
publisher |
Canadian Science Publishing |
publishDate |
1984 |
url |
http://dx.doi.org/10.1139/z84-013 http://www.nrcresearchpress.com/doi/pdf/10.1139/z84-013 |
genre |
Oncorhynchus gorbuscha Pink salmon |
genre_facet |
Oncorhynchus gorbuscha Pink salmon |
op_source |
Canadian Journal of Zoology volume 62, issue 1, page 72-79 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z84-013 |
container_title |
Canadian Journal of Zoology |
container_volume |
62 |
container_issue |
1 |
container_start_page |
72 |
op_container_end_page |
79 |
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1785572286981472256 |