Effects of episodic acidification on Atlantic salmon ( Salmo salar) smolts
The effect of episodic acidification on Atlantic salmon (Salmo salar) smolt physiology and survival in fresh water (FW) and seawater (SW) was investigated. Smolts were held in either ambient (control, pH 6.06.6), acidified (chronic, pH 4.46.1), or episodically acidified (episodic, pH reduction fro...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Online Access: | http://dx.doi.org/10.1139/f03-015 http://www.nrcresearchpress.com/doi/pdf/10.1139/f03-015 |
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crcansciencepubl:10.1139/f03-015 2024-09-09T19:30:30+00:00 Effects of episodic acidification on Atlantic salmon ( Salmo salar) smolts Magee, J A Obedzinski, M McCormick, S D Kocik, J F 2003 http://dx.doi.org/10.1139/f03-015 http://www.nrcresearchpress.com/doi/pdf/10.1139/f03-015 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 60, issue 2, page 214-221 ISSN 0706-652X 1205-7533 journal-article 2003 crcansciencepubl https://doi.org/10.1139/f03-015 2024-06-20T04:11:53Z The effect of episodic acidification on Atlantic salmon (Salmo salar) smolt physiology and survival in fresh water (FW) and seawater (SW) was investigated. Smolts were held in either ambient (control, pH 6.06.6), acidified (chronic, pH 4.46.1), or episodically acidified (episodic, pH reduction from control levels to pH ~5.2 for 48 h once weekly) river water for 31 days and then transferred to 34 SW. Smolts fed little while in acidified conditions and chronic smolts did not grow in length or weight. In FW, chronic smolts experienced increases in hematocrit and plasma potassium and reductions in plasma sodium and chloride. Upon transfer to SW, chronic and episodic smolts experienced reductions in hematocrit, increases in plasma sodium, chloride, and potassium levels, and suffered mortalities. Gill Na + ,K + -ATPase and citrate synthase activities were reduced by exposure to acid. For most parameters, the effect of episodic acid exposure was less than that of chronic acidification. Exposure to acidic conditions, even when short in duration and followed by a 30-h recovery period in suitable water (pH 6.5), led to a 35% mortality of smolts upon transfer to SW. This study highlights the importance of measuring and assessing sublethal stresses in FW and their ultimate effects in marine ecosystems. Article in Journal/Newspaper Atlantic salmon Salmo salar Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 60 2 214 221 |
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Canadian Science Publishing |
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English |
description |
The effect of episodic acidification on Atlantic salmon (Salmo salar) smolt physiology and survival in fresh water (FW) and seawater (SW) was investigated. Smolts were held in either ambient (control, pH 6.06.6), acidified (chronic, pH 4.46.1), or episodically acidified (episodic, pH reduction from control levels to pH ~5.2 for 48 h once weekly) river water for 31 days and then transferred to 34 SW. Smolts fed little while in acidified conditions and chronic smolts did not grow in length or weight. In FW, chronic smolts experienced increases in hematocrit and plasma potassium and reductions in plasma sodium and chloride. Upon transfer to SW, chronic and episodic smolts experienced reductions in hematocrit, increases in plasma sodium, chloride, and potassium levels, and suffered mortalities. Gill Na + ,K + -ATPase and citrate synthase activities were reduced by exposure to acid. For most parameters, the effect of episodic acid exposure was less than that of chronic acidification. Exposure to acidic conditions, even when short in duration and followed by a 30-h recovery period in suitable water (pH 6.5), led to a 35% mortality of smolts upon transfer to SW. This study highlights the importance of measuring and assessing sublethal stresses in FW and their ultimate effects in marine ecosystems. |
format |
Article in Journal/Newspaper |
author |
Magee, J A Obedzinski, M McCormick, S D Kocik, J F |
spellingShingle |
Magee, J A Obedzinski, M McCormick, S D Kocik, J F Effects of episodic acidification on Atlantic salmon ( Salmo salar) smolts |
author_facet |
Magee, J A Obedzinski, M McCormick, S D Kocik, J F |
author_sort |
Magee, J A |
title |
Effects of episodic acidification on Atlantic salmon ( Salmo salar) smolts |
title_short |
Effects of episodic acidification on Atlantic salmon ( Salmo salar) smolts |
title_full |
Effects of episodic acidification on Atlantic salmon ( Salmo salar) smolts |
title_fullStr |
Effects of episodic acidification on Atlantic salmon ( Salmo salar) smolts |
title_full_unstemmed |
Effects of episodic acidification on Atlantic salmon ( Salmo salar) smolts |
title_sort |
effects of episodic acidification on atlantic salmon ( salmo salar) smolts |
publisher |
Canadian Science Publishing |
publishDate |
2003 |
url |
http://dx.doi.org/10.1139/f03-015 http://www.nrcresearchpress.com/doi/pdf/10.1139/f03-015 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 60, issue 2, page 214-221 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f03-015 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
60 |
container_issue |
2 |
container_start_page |
214 |
op_container_end_page |
221 |
_version_ |
1809899477867167744 |