Using scale-derived estimates of body size in analyses of Atlantic salmon life-history variation: a cautionary note
Measurements of individual body length at different life stages are critical in understanding fish ecology and evolution. Such data can be obtained via back-calculation from measurements of fish scales or by using the size of the scale as a direct proxy for body length. Using data from Atlantic salm...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Online Access: | https://hdl.handle.net/11250/3127948 https://doi.org/10.1139/cjfas-2023-0154 |
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ftninstnf:oai:brage.nina.no:11250/3127948 2024-05-19T07:37:38+00:00 Using scale-derived estimates of body size in analyses of Atlantic salmon life-history variation: a cautionary note Burton, Tim Ugedal, Ola Karlsson, Sten Thorstad, Eva Bonsak Bolstad, Geir Hysing Atlantic 2024 application/pdf https://hdl.handle.net/11250/3127948 https://doi.org/10.1139/cjfas-2023-0154 eng eng Norges forskningsråd: 280308 Norges forskningsråd: 275862 Andre: Statkraft Energi AS Norges forskningsråd: 160022/F40 urn:issn:0706-652X https://hdl.handle.net/11250/3127948 https://doi.org/10.1139/cjfas-2023-0154 cristin:2263303 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2024 The Authors Canadian Journal of Fisheries and Aquatic Sciences scalimetry scale reading scale radius body size vgll3 six6 VDP::Økologi: 488 VDP::Ecology: 488 Peer reviewed Journal article 2024 ftninstnf https://doi.org/10.1139/cjfas-2023-0154 2024-05-01T23:40:09Z Measurements of individual body length at different life stages are critical in understanding fish ecology and evolution. Such data can be obtained via back-calculation from measurements of fish scales or by using the size of the scale as a direct proxy for body length. Using data from Atlantic salmon, we test key assumptions associated with each approach and their implications for investigating how variation in growth earlier in life is associated with age at maturity. The scaling of scale size approximated isometry and was similar among individuals who matured at different ages——validating a key assumption of back-calculation. However, we observed that individuals genetically predisposed to delay maturation have smaller scales for their body size——challenging a key assumption of the “direct scale-size” approach. Depending on the method of body length estimation, the relationship between body length growth earlier in life and age at maturity was observed to differ. Thus, when using scale material to study the relationship between growth and maturation in salmon, we recommend back-calculation and an assumed allometric scaling coefficient. scalimetry, scale reading, scale radius, body size, vgll3, six6 publishedVersion Article in Journal/Newspaper Atlantic salmon Norwegian Institute for Nature Research: Brage NINA Canadian Journal of Fisheries and Aquatic Sciences 81 5 549 558 |
institution |
Open Polar |
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Norwegian Institute for Nature Research: Brage NINA |
op_collection_id |
ftninstnf |
language |
English |
topic |
scalimetry scale reading scale radius body size vgll3 six6 VDP::Økologi: 488 VDP::Ecology: 488 |
spellingShingle |
scalimetry scale reading scale radius body size vgll3 six6 VDP::Økologi: 488 VDP::Ecology: 488 Burton, Tim Ugedal, Ola Karlsson, Sten Thorstad, Eva Bonsak Bolstad, Geir Hysing Using scale-derived estimates of body size in analyses of Atlantic salmon life-history variation: a cautionary note |
topic_facet |
scalimetry scale reading scale radius body size vgll3 six6 VDP::Økologi: 488 VDP::Ecology: 488 |
description |
Measurements of individual body length at different life stages are critical in understanding fish ecology and evolution. Such data can be obtained via back-calculation from measurements of fish scales or by using the size of the scale as a direct proxy for body length. Using data from Atlantic salmon, we test key assumptions associated with each approach and their implications for investigating how variation in growth earlier in life is associated with age at maturity. The scaling of scale size approximated isometry and was similar among individuals who matured at different ages——validating a key assumption of back-calculation. However, we observed that individuals genetically predisposed to delay maturation have smaller scales for their body size——challenging a key assumption of the “direct scale-size” approach. Depending on the method of body length estimation, the relationship between body length growth earlier in life and age at maturity was observed to differ. Thus, when using scale material to study the relationship between growth and maturation in salmon, we recommend back-calculation and an assumed allometric scaling coefficient. scalimetry, scale reading, scale radius, body size, vgll3, six6 publishedVersion |
format |
Article in Journal/Newspaper |
author |
Burton, Tim Ugedal, Ola Karlsson, Sten Thorstad, Eva Bonsak Bolstad, Geir Hysing |
author_facet |
Burton, Tim Ugedal, Ola Karlsson, Sten Thorstad, Eva Bonsak Bolstad, Geir Hysing |
author_sort |
Burton, Tim |
title |
Using scale-derived estimates of body size in analyses of Atlantic salmon life-history variation: a cautionary note |
title_short |
Using scale-derived estimates of body size in analyses of Atlantic salmon life-history variation: a cautionary note |
title_full |
Using scale-derived estimates of body size in analyses of Atlantic salmon life-history variation: a cautionary note |
title_fullStr |
Using scale-derived estimates of body size in analyses of Atlantic salmon life-history variation: a cautionary note |
title_full_unstemmed |
Using scale-derived estimates of body size in analyses of Atlantic salmon life-history variation: a cautionary note |
title_sort |
using scale-derived estimates of body size in analyses of atlantic salmon life-history variation: a cautionary note |
publishDate |
2024 |
url |
https://hdl.handle.net/11250/3127948 https://doi.org/10.1139/cjfas-2023-0154 |
op_coverage |
Atlantic |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences |
op_relation |
Norges forskningsråd: 280308 Norges forskningsråd: 275862 Andre: Statkraft Energi AS Norges forskningsråd: 160022/F40 urn:issn:0706-652X https://hdl.handle.net/11250/3127948 https://doi.org/10.1139/cjfas-2023-0154 cristin:2263303 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2024 The Authors |
op_doi |
https://doi.org/10.1139/cjfas-2023-0154 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
81 |
container_issue |
5 |
container_start_page |
549 |
op_container_end_page |
558 |
_version_ |
1799476979239485440 |