Is it advantageous for Atlantic salmon to be triploid at lower temperatures?
Marine organisms living at low temperatures tend to have larger genomes and larger cells which suggest that these traits can be beneficial in colder environments. In fish, triploidy (three complete sets of chromosomes) can be induced experimentally following fertilization, which provides a model sys...
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Online Access: | https://hdl.handle.net/11250/2728275 https://doi.org/10.1016/j.jtherbio.2020.102548 |
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ftimr:oai:imr.brage.unit.no:11250/2728275 2023-05-15T15:30:35+02:00 Is it advantageous for Atlantic salmon to be triploid at lower temperatures? Riseth, Erling Fraser, Thomas Sambraus, Florian Stien, Lars Helge Hvas, Malthe 2020 application/pdf https://hdl.handle.net/11250/2728275 https://doi.org/10.1016/j.jtherbio.2020.102548 eng eng Norges forskningsråd: 237790 Journal of Thermal Biology. 2020, 89 . urn:issn:0306-4565 https://hdl.handle.net/11250/2728275 https://doi.org/10.1016/j.jtherbio.2020.102548 cristin:1842579 7 89 Journal of Thermal Biology 102548 Peer reviewed Journal article 2020 ftimr https://doi.org/10.1016/j.jtherbio.2020.102548 2021-09-23T20:14:47Z Marine organisms living at low temperatures tend to have larger genomes and larger cells which suggest that these traits can be beneficial in colder environments. In fish, triploidy (three complete sets of chromosomes) can be induced experimentally following fertilization, which provides a model system to investigate the hypothesis that larger cells and genomes offers a physiological advantage at low temperatures. We tested this hypothesis by measuring metabolic rates and swimming performance of diploid and triploid Atlantic salmon (Salmo salar) post smolts acclimated to 3 or 10.5 °C. At 10.5 °C, triploids had significantly lower maximum metabolic rates which resulted in a lower aerobic scope compared to diploids. In addition, triploids initiated ram ventilation at lower swimming speeds, providing further evidence of a reduced capacity to meet oxygen demands during strenuous activity at 10.5 °C. However, at 3 °C, metabolic rates and critical swimming speeds were similar between both ploidies, and as expected substantially lower than at 10.5 °C. Therefore, triploidy in colder environments did not provide any advantage over diploidy in terms of metabolic rate traits or swimming performance in Atlantic salmon. We therefore conclude that traits, other than aerobic scope and swimming performance, contribute to the trend for increased cell and genome size in marine ectotherms living in cold environments. publishedVersion Article in Journal/Newspaper Atlantic salmon Salmo salar Institute for Marine Research: Brage IMR Journal of Thermal Biology 89 102548 |
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Institute for Marine Research: Brage IMR |
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English |
description |
Marine organisms living at low temperatures tend to have larger genomes and larger cells which suggest that these traits can be beneficial in colder environments. In fish, triploidy (three complete sets of chromosomes) can be induced experimentally following fertilization, which provides a model system to investigate the hypothesis that larger cells and genomes offers a physiological advantage at low temperatures. We tested this hypothesis by measuring metabolic rates and swimming performance of diploid and triploid Atlantic salmon (Salmo salar) post smolts acclimated to 3 or 10.5 °C. At 10.5 °C, triploids had significantly lower maximum metabolic rates which resulted in a lower aerobic scope compared to diploids. In addition, triploids initiated ram ventilation at lower swimming speeds, providing further evidence of a reduced capacity to meet oxygen demands during strenuous activity at 10.5 °C. However, at 3 °C, metabolic rates and critical swimming speeds were similar between both ploidies, and as expected substantially lower than at 10.5 °C. Therefore, triploidy in colder environments did not provide any advantage over diploidy in terms of metabolic rate traits or swimming performance in Atlantic salmon. We therefore conclude that traits, other than aerobic scope and swimming performance, contribute to the trend for increased cell and genome size in marine ectotherms living in cold environments. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Riseth, Erling Fraser, Thomas Sambraus, Florian Stien, Lars Helge Hvas, Malthe |
spellingShingle |
Riseth, Erling Fraser, Thomas Sambraus, Florian Stien, Lars Helge Hvas, Malthe Is it advantageous for Atlantic salmon to be triploid at lower temperatures? |
author_facet |
Riseth, Erling Fraser, Thomas Sambraus, Florian Stien, Lars Helge Hvas, Malthe |
author_sort |
Riseth, Erling |
title |
Is it advantageous for Atlantic salmon to be triploid at lower temperatures? |
title_short |
Is it advantageous for Atlantic salmon to be triploid at lower temperatures? |
title_full |
Is it advantageous for Atlantic salmon to be triploid at lower temperatures? |
title_fullStr |
Is it advantageous for Atlantic salmon to be triploid at lower temperatures? |
title_full_unstemmed |
Is it advantageous for Atlantic salmon to be triploid at lower temperatures? |
title_sort |
is it advantageous for atlantic salmon to be triploid at lower temperatures? |
publishDate |
2020 |
url |
https://hdl.handle.net/11250/2728275 https://doi.org/10.1016/j.jtherbio.2020.102548 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
7 89 Journal of Thermal Biology 102548 |
op_relation |
Norges forskningsråd: 237790 Journal of Thermal Biology. 2020, 89 . urn:issn:0306-4565 https://hdl.handle.net/11250/2728275 https://doi.org/10.1016/j.jtherbio.2020.102548 cristin:1842579 |
op_doi |
https://doi.org/10.1016/j.jtherbio.2020.102548 |
container_title |
Journal of Thermal Biology |
container_volume |
89 |
container_start_page |
102548 |
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1766361044910866432 |