Winter temperature and food quality affect age at maturity: an experimental test with Atlantic salmon ( Salmo salar)
Field studies have revealed that many ectotherms mature younger and smaller in warmer environments although they grow faster. This has puzzled ecologists because the direct effect of factors that accelerate growth is expected to be larger, not smaller size. We tested this experimentally for Atlantic...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Canadian Science Publishing
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crcansciencepubl:10.1139/f2012-108 2024-09-30T14:32:22+00:00 Winter temperature and food quality affect age at maturity: an experimental test with Atlantic salmon ( Salmo salar) Jonsson, Bror Finstad, Anders G. Jonsson, Nina Bradford, Michael 2012 http://dx.doi.org/10.1139/f2012-108 http://www.nrcresearchpress.com/doi/full-xml/10.1139/f2012-108 http://www.nrcresearchpress.com/doi/pdf/10.1139/f2012-108 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 69, issue 11, page 1817-1826 ISSN 0706-652X 1205-7533 journal-article 2012 crcansciencepubl https://doi.org/10.1139/f2012-108 2024-09-12T04:13:24Z Field studies have revealed that many ectotherms mature younger and smaller in warmer environments although they grow faster. This has puzzled ecologists because the direct effect of factors that accelerate growth is expected to be larger, not smaller size. We tested this experimentally for Atlantic salmon (Salmo salar) at two winter temperatures and diets. Logistic regression revealed that the probability of maturation during the second year in sea water, relative to the probability of older maturation, increased with temperature and growth rate during the first winter. Also, large size and high condition factor 1 year prior to maturation stimulated maturation. In females, a high lipid diet increased the probability of maturation as one-sea-winter fish, and there were significant interactions between winter temperature and food quality and between body size and condition factor the first autumn in sea water. Thus, if the direct effect of temperature on growth rate is the main effect of warming, salmon are likely to attain maturity younger and smaller. Also, richer food decreased age at maturation in females. This finding has consequences for interpretations of climate change impacts on age at maturity in Atlantic salmon and may also hold for many other ectotherm species. Article in Journal/Newspaper Atlantic salmon Salmo salar Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 69 11 1817 1826 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
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English |
description |
Field studies have revealed that many ectotherms mature younger and smaller in warmer environments although they grow faster. This has puzzled ecologists because the direct effect of factors that accelerate growth is expected to be larger, not smaller size. We tested this experimentally for Atlantic salmon (Salmo salar) at two winter temperatures and diets. Logistic regression revealed that the probability of maturation during the second year in sea water, relative to the probability of older maturation, increased with temperature and growth rate during the first winter. Also, large size and high condition factor 1 year prior to maturation stimulated maturation. In females, a high lipid diet increased the probability of maturation as one-sea-winter fish, and there were significant interactions between winter temperature and food quality and between body size and condition factor the first autumn in sea water. Thus, if the direct effect of temperature on growth rate is the main effect of warming, salmon are likely to attain maturity younger and smaller. Also, richer food decreased age at maturation in females. This finding has consequences for interpretations of climate change impacts on age at maturity in Atlantic salmon and may also hold for many other ectotherm species. |
author2 |
Bradford, Michael |
format |
Article in Journal/Newspaper |
author |
Jonsson, Bror Finstad, Anders G. Jonsson, Nina |
spellingShingle |
Jonsson, Bror Finstad, Anders G. Jonsson, Nina Winter temperature and food quality affect age at maturity: an experimental test with Atlantic salmon ( Salmo salar) |
author_facet |
Jonsson, Bror Finstad, Anders G. Jonsson, Nina |
author_sort |
Jonsson, Bror |
title |
Winter temperature and food quality affect age at maturity: an experimental test with Atlantic salmon ( Salmo salar) |
title_short |
Winter temperature and food quality affect age at maturity: an experimental test with Atlantic salmon ( Salmo salar) |
title_full |
Winter temperature and food quality affect age at maturity: an experimental test with Atlantic salmon ( Salmo salar) |
title_fullStr |
Winter temperature and food quality affect age at maturity: an experimental test with Atlantic salmon ( Salmo salar) |
title_full_unstemmed |
Winter temperature and food quality affect age at maturity: an experimental test with Atlantic salmon ( Salmo salar) |
title_sort |
winter temperature and food quality affect age at maturity: an experimental test with atlantic salmon ( salmo salar) |
publisher |
Canadian Science Publishing |
publishDate |
2012 |
url |
http://dx.doi.org/10.1139/f2012-108 http://www.nrcresearchpress.com/doi/full-xml/10.1139/f2012-108 http://www.nrcresearchpress.com/doi/pdf/10.1139/f2012-108 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 69, issue 11, page 1817-1826 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f2012-108 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
69 |
container_issue |
11 |
container_start_page |
1817 |
op_container_end_page |
1826 |
_version_ |
1811636539060387840 |