Temperature-related loss of smolt characteristics in Atlantic salmon ( Salmo salar) in the wild
Atlantic salmon (Salmo salar) that had previously been released as fry in tributaries of the Connecticut River were captured from 1993 to 1997 during their normal spring smolt migration 198 km from the mouth of the river. Smolts had peak levels of gill Na + ,K + -ATPase activity and salinity toleran...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Language: | English |
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1999
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Online Access: | http://dx.doi.org/10.1139/f99-099 http://www.nrcresearchpress.com/doi/pdf/10.1139/f99-099 |
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crcansciencepubl:10.1139/f99-099 2024-06-23T07:51:19+00:00 Temperature-related loss of smolt characteristics in Atlantic salmon ( Salmo salar) in the wild McCormick, Stephen D Cunjak, Richard A Dempson, Brian O'Dea, Michael F Carey, Judith B 1999 http://dx.doi.org/10.1139/f99-099 http://www.nrcresearchpress.com/doi/pdf/10.1139/f99-099 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 56, issue 9, page 1649-1667 ISSN 0706-652X 1205-7533 journal-article 1999 crcansciencepubl https://doi.org/10.1139/f99-099 2024-06-06T04:11:17Z Atlantic salmon (Salmo salar) that had previously been released as fry in tributaries of the Connecticut River were captured from 1993 to 1997 during their normal spring smolt migration 198 km from the mouth of the river. Smolts had peak levels of gill Na + ,K + -ATPase activity and salinity tolerance early in migration (early May), indicating physiological readiness to enter seawater. Significant decreases in gill Na + ,K + -ATPase activity (29-66%) and salinity tolerance were seen in smolts at the end of the migratory period (late May and early June). Reduced gill Na + ,K + -ATPase activity occurred earlier in warm years and was directly related to the degree-days during migration (r 2 = 0.75). Reduced gill Na + ,K + -ATPase activity was found at the end of migration in warmer, southern rivers (Connecticut River and Penobscot River, Maine) but not in northern rivers (Catamaran Brook, New Brunswick, and Conne River, Newfoundland). Both hatchery- and stream-reared fish held in the laboratory exhibited a more rapid loss of physiological smolt characteristics when held at higher temperature. The results indicate that late migrants in southern rivers lose physiological smolt characteristics due to high temperatures during spring migration. Delays in migration, such as those that occur at dams, may have negative impacts on smolt survival in warmer rivers. Article in Journal/Newspaper Atlantic salmon Newfoundland Salmo salar Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 56 9 1649 1667 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Atlantic salmon (Salmo salar) that had previously been released as fry in tributaries of the Connecticut River were captured from 1993 to 1997 during their normal spring smolt migration 198 km from the mouth of the river. Smolts had peak levels of gill Na + ,K + -ATPase activity and salinity tolerance early in migration (early May), indicating physiological readiness to enter seawater. Significant decreases in gill Na + ,K + -ATPase activity (29-66%) and salinity tolerance were seen in smolts at the end of the migratory period (late May and early June). Reduced gill Na + ,K + -ATPase activity occurred earlier in warm years and was directly related to the degree-days during migration (r 2 = 0.75). Reduced gill Na + ,K + -ATPase activity was found at the end of migration in warmer, southern rivers (Connecticut River and Penobscot River, Maine) but not in northern rivers (Catamaran Brook, New Brunswick, and Conne River, Newfoundland). Both hatchery- and stream-reared fish held in the laboratory exhibited a more rapid loss of physiological smolt characteristics when held at higher temperature. The results indicate that late migrants in southern rivers lose physiological smolt characteristics due to high temperatures during spring migration. Delays in migration, such as those that occur at dams, may have negative impacts on smolt survival in warmer rivers. |
format |
Article in Journal/Newspaper |
author |
McCormick, Stephen D Cunjak, Richard A Dempson, Brian O'Dea, Michael F Carey, Judith B |
spellingShingle |
McCormick, Stephen D Cunjak, Richard A Dempson, Brian O'Dea, Michael F Carey, Judith B Temperature-related loss of smolt characteristics in Atlantic salmon ( Salmo salar) in the wild |
author_facet |
McCormick, Stephen D Cunjak, Richard A Dempson, Brian O'Dea, Michael F Carey, Judith B |
author_sort |
McCormick, Stephen D |
title |
Temperature-related loss of smolt characteristics in Atlantic salmon ( Salmo salar) in the wild |
title_short |
Temperature-related loss of smolt characteristics in Atlantic salmon ( Salmo salar) in the wild |
title_full |
Temperature-related loss of smolt characteristics in Atlantic salmon ( Salmo salar) in the wild |
title_fullStr |
Temperature-related loss of smolt characteristics in Atlantic salmon ( Salmo salar) in the wild |
title_full_unstemmed |
Temperature-related loss of smolt characteristics in Atlantic salmon ( Salmo salar) in the wild |
title_sort |
temperature-related loss of smolt characteristics in atlantic salmon ( salmo salar) in the wild |
publisher |
Canadian Science Publishing |
publishDate |
1999 |
url |
http://dx.doi.org/10.1139/f99-099 http://www.nrcresearchpress.com/doi/pdf/10.1139/f99-099 |
genre |
Atlantic salmon Newfoundland Salmo salar |
genre_facet |
Atlantic salmon Newfoundland Salmo salar |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 56, issue 9, page 1649-1667 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f99-099 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
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56 |
container_issue |
9 |
container_start_page |
1649 |
op_container_end_page |
1667 |
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1802642367828721664 |