Physiological and endocrine changes in Atlantic salmon smolts during hatchery rearing, downstream migration, and ocean entry
Billions of hatchery salmon smolts are released annually in an attempt to mitigate anthropogenic impacts on freshwater habitats, often with limited success. Mortality of wild and hatchery fish is high during downstream and early ocean migration. To understand changes that occur during migration, we...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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crcansciencepubl:10.1139/cjfas-2012-0151 2024-05-12T08:01:16+00:00 Physiological and endocrine changes in Atlantic salmon smolts during hatchery rearing, downstream migration, and ocean entry McCormick, Stephen D. Sheehan, Timothy F. Björnsson, Björn Thrandur Lipsky, Christine Kocik, John F. Regish, Amy M. O'Dea, Michael F. 2013 http://dx.doi.org/10.1139/cjfas-2012-0151 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2012-0151 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2012-0151 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 70, issue 1, page 105-118 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2013 crcansciencepubl https://doi.org/10.1139/cjfas-2012-0151 2024-04-18T06:54:48Z Billions of hatchery salmon smolts are released annually in an attempt to mitigate anthropogenic impacts on freshwater habitats, often with limited success. Mortality of wild and hatchery fish is high during downstream and early ocean migration. To understand changes that occur during migration, we examined physiological and endocrine changes in Atlantic salmon (Salmo salar) smolts during hatchery rearing, downstream migration, and early ocean entry in two successive years. Gill Na + /K + -ATPase activity increased in the hatchery during spring, increased further after river release, and was slightly lower after recapture in the ocean. Plasma growth hormone levels increased in the hatchery, were higher in the river, and increased further in the ocean. Plasma IGF-I remained relatively constant in the hatchery, increased in the river, then decreased in the ocean. Plasma thyroid hormones were variable in the hatchery, but increased in both river- and ocean-captured smolts. Naturally reared fish had lower condition factor, gill NKA activity, and plasma thyroxine than hatchery fish in the river but were similar in the ocean. This novel data set provides a vital first step in understanding the role and norms of endocrine function in smolts and the metrics of successful marine entry. Article in Journal/Newspaper Atlantic salmon Salmo salar Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 70 1 105 118 |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
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Aquatic Science Ecology, Evolution, Behavior and Systematics McCormick, Stephen D. Sheehan, Timothy F. Björnsson, Björn Thrandur Lipsky, Christine Kocik, John F. Regish, Amy M. O'Dea, Michael F. Physiological and endocrine changes in Atlantic salmon smolts during hatchery rearing, downstream migration, and ocean entry |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Billions of hatchery salmon smolts are released annually in an attempt to mitigate anthropogenic impacts on freshwater habitats, often with limited success. Mortality of wild and hatchery fish is high during downstream and early ocean migration. To understand changes that occur during migration, we examined physiological and endocrine changes in Atlantic salmon (Salmo salar) smolts during hatchery rearing, downstream migration, and early ocean entry in two successive years. Gill Na + /K + -ATPase activity increased in the hatchery during spring, increased further after river release, and was slightly lower after recapture in the ocean. Plasma growth hormone levels increased in the hatchery, were higher in the river, and increased further in the ocean. Plasma IGF-I remained relatively constant in the hatchery, increased in the river, then decreased in the ocean. Plasma thyroid hormones were variable in the hatchery, but increased in both river- and ocean-captured smolts. Naturally reared fish had lower condition factor, gill NKA activity, and plasma thyroxine than hatchery fish in the river but were similar in the ocean. This novel data set provides a vital first step in understanding the role and norms of endocrine function in smolts and the metrics of successful marine entry. |
format |
Article in Journal/Newspaper |
author |
McCormick, Stephen D. Sheehan, Timothy F. Björnsson, Björn Thrandur Lipsky, Christine Kocik, John F. Regish, Amy M. O'Dea, Michael F. |
author_facet |
McCormick, Stephen D. Sheehan, Timothy F. Björnsson, Björn Thrandur Lipsky, Christine Kocik, John F. Regish, Amy M. O'Dea, Michael F. |
author_sort |
McCormick, Stephen D. |
title |
Physiological and endocrine changes in Atlantic salmon smolts during hatchery rearing, downstream migration, and ocean entry |
title_short |
Physiological and endocrine changes in Atlantic salmon smolts during hatchery rearing, downstream migration, and ocean entry |
title_full |
Physiological and endocrine changes in Atlantic salmon smolts during hatchery rearing, downstream migration, and ocean entry |
title_fullStr |
Physiological and endocrine changes in Atlantic salmon smolts during hatchery rearing, downstream migration, and ocean entry |
title_full_unstemmed |
Physiological and endocrine changes in Atlantic salmon smolts during hatchery rearing, downstream migration, and ocean entry |
title_sort |
physiological and endocrine changes in atlantic salmon smolts during hatchery rearing, downstream migration, and ocean entry |
publisher |
Canadian Science Publishing |
publishDate |
2013 |
url |
http://dx.doi.org/10.1139/cjfas-2012-0151 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2012-0151 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2012-0151 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 70, issue 1, page 105-118 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjfas-2012-0151 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
70 |
container_issue |
1 |
container_start_page |
105 |
op_container_end_page |
118 |
_version_ |
1798843379483672576 |