Lowering treatment temperature reduces salmon mortality: a new way to treat with hydrogen peroxide in aquaculture
Abstract BACKGROUND Hydrogen peroxide (H 2 O 2 ) baths are widely used to reduce numbers of salmon lice on farmed Atlantic salmon. Fish mortalities often occur after baths, with warmer temperatures increasing lethality. We tested whether mortality could be reduced and lice removal efficacy maintaine...
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crwiley:10.1002/ps.4751 2024-09-15T17:56:29+00:00 Lowering treatment temperature reduces salmon mortality: a new way to treat with hydrogen peroxide in aquaculture Overton, Kathy Samsing, Francisca Oppedal, Frode Stien, Lars H Dempster, Tim Norges Forskningsråd 2017 http://dx.doi.org/10.1002/ps.4751 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fps.4751 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ps.4751 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ps.4751 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Pest Management Science volume 74, issue 3, page 535-540 ISSN 1526-498X 1526-4998 journal-article 2017 crwiley https://doi.org/10.1002/ps.4751 2024-07-18T04:23:48Z Abstract BACKGROUND Hydrogen peroxide (H 2 O 2 ) baths are widely used to reduce numbers of salmon lice on farmed Atlantic salmon. Fish mortalities often occur after baths, with warmer temperatures increasing lethality. We tested whether mortality could be reduced and lice removal efficacy maintained by lowering bath temperatures relative to ambient temperatures. Post‐smolt salmon infected with lice were held at 10, 13 or 16 °C, and treated with 1.5 g/L H 2 O 2 for 20 min at equal or lower bath temperatures of 7, 10 or 13 °C. RESULTS Salmon mortality decreased as ambient and bath temperatures decreased. No mortality occurred when fish at 13 °C were treated at 7 °C. For ambient temperatures of 16 °C, the number of lice remaining was reduced by four‐fold when treated at 7 °C compared with 13 °C. All treatments in which mortality was zero had similar efficacies regardless of bath temperature. CONCLUSION We took salmon from warmer to colder temperatures to determine the optimum bathing temperature to prevent mortality. A temperature of 7 °C was optimal when treating with 1.5 g/L of H 2 O 2 , as mortality was zero and pre‐adult lice removal was unchanged. By manipulating temperature, we developed a new method of H 2 O 2 bathing that reduces mortality. When ambient temperatures are >10 °C, we recommend that the industry decrease H 2 O 2 bath temperatures. © 2017 Society of Chemical Industry Article in Journal/Newspaper Atlantic salmon Wiley Online Library Pest Management Science 74 3 535 540 |
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Wiley Online Library |
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English |
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Abstract BACKGROUND Hydrogen peroxide (H 2 O 2 ) baths are widely used to reduce numbers of salmon lice on farmed Atlantic salmon. Fish mortalities often occur after baths, with warmer temperatures increasing lethality. We tested whether mortality could be reduced and lice removal efficacy maintained by lowering bath temperatures relative to ambient temperatures. Post‐smolt salmon infected with lice were held at 10, 13 or 16 °C, and treated with 1.5 g/L H 2 O 2 for 20 min at equal or lower bath temperatures of 7, 10 or 13 °C. RESULTS Salmon mortality decreased as ambient and bath temperatures decreased. No mortality occurred when fish at 13 °C were treated at 7 °C. For ambient temperatures of 16 °C, the number of lice remaining was reduced by four‐fold when treated at 7 °C compared with 13 °C. All treatments in which mortality was zero had similar efficacies regardless of bath temperature. CONCLUSION We took salmon from warmer to colder temperatures to determine the optimum bathing temperature to prevent mortality. A temperature of 7 °C was optimal when treating with 1.5 g/L of H 2 O 2 , as mortality was zero and pre‐adult lice removal was unchanged. By manipulating temperature, we developed a new method of H 2 O 2 bathing that reduces mortality. When ambient temperatures are >10 °C, we recommend that the industry decrease H 2 O 2 bath temperatures. © 2017 Society of Chemical Industry |
author2 |
Norges Forskningsråd |
format |
Article in Journal/Newspaper |
author |
Overton, Kathy Samsing, Francisca Oppedal, Frode Stien, Lars H Dempster, Tim |
spellingShingle |
Overton, Kathy Samsing, Francisca Oppedal, Frode Stien, Lars H Dempster, Tim Lowering treatment temperature reduces salmon mortality: a new way to treat with hydrogen peroxide in aquaculture |
author_facet |
Overton, Kathy Samsing, Francisca Oppedal, Frode Stien, Lars H Dempster, Tim |
author_sort |
Overton, Kathy |
title |
Lowering treatment temperature reduces salmon mortality: a new way to treat with hydrogen peroxide in aquaculture |
title_short |
Lowering treatment temperature reduces salmon mortality: a new way to treat with hydrogen peroxide in aquaculture |
title_full |
Lowering treatment temperature reduces salmon mortality: a new way to treat with hydrogen peroxide in aquaculture |
title_fullStr |
Lowering treatment temperature reduces salmon mortality: a new way to treat with hydrogen peroxide in aquaculture |
title_full_unstemmed |
Lowering treatment temperature reduces salmon mortality: a new way to treat with hydrogen peroxide in aquaculture |
title_sort |
lowering treatment temperature reduces salmon mortality: a new way to treat with hydrogen peroxide in aquaculture |
publisher |
Wiley |
publishDate |
2017 |
url |
http://dx.doi.org/10.1002/ps.4751 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fps.4751 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ps.4751 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ps.4751 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
Pest Management Science volume 74, issue 3, page 535-540 ISSN 1526-498X 1526-4998 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/ps.4751 |
container_title |
Pest Management Science |
container_volume |
74 |
container_issue |
3 |
container_start_page |
535 |
op_container_end_page |
540 |
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1810432683786895360 |