Lifelong divergence of growth patterns in Arctic charr life history strategies: implications for sustainable fisheries in a changing climate
Arctic charr (Salvelinus alpinus Linnaeus, 1758) are phenotypically variable with multiple life history strategies including anadromous and freshwater resident individuals. The mechanism determining life history is believed to be set early in life. Anadromous individuals show greater seasonality in...
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Canadian Science Publishing
2021
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Online Access: | https://doi.org/10.1139/as-2019-0032 https://doaj.org/article/6b23840ddf3d4449be170f896e8c31ef |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:6b23840ddf3d4449be170f896e8c31ef 2023-05-15T14:22:20+02:00 Lifelong divergence of growth patterns in Arctic charr life history strategies: implications for sustainable fisheries in a changing climate Gabrielle Grenier Ross F. Tallman 2021-06-01 https://doi.org/10.1139/as-2019-0032 https://doaj.org/article/6b23840ddf3d4449be170f896e8c31ef en fr eng fre Canadian Science Publishing doi:10.1139/as-2019-0032 2368-7460 https://doaj.org/article/6b23840ddf3d4449be170f896e8c31ef undefined Arctic Science, Vol 7, Iss 2, Pp 454-470 (2021) early life otolith arctic charr seasonal growth life history strategy envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2021 fttriple https://doi.org/10.1139/as-2019-0032 2023-01-22T19:11:46Z Arctic charr (Salvelinus alpinus Linnaeus, 1758) are phenotypically variable with multiple life history strategies including anadromous and freshwater resident individuals. The mechanism determining life history is believed to be set early in life. Anadromous individuals show greater seasonality in growth and feeding after the first seaward migration relative to resident conspecifics. We used otolith growth increment measurements to estimate lifelong growth patterns for 355 individuals with anadromous or resident life history from four populations within Cumberland Sound, Nunavut. Using a general and a generalized linear model, we discovered a linear increase (estimate = 0.006) in growth for both Arctic charr life histories between 1990 and 2016. Resident Arctic charr have lower annual growth (estimate = −0.176) and show a decrease in the annual proportion of summer growth as they age (estimate = −0.042), whereas their anadromous counterparts maintain a higher seasonality in their growth patterns with age. This suggests that growth is indeed important in life history trajectory for Arctic charr and that seasonal growth patterns differ among life histories. The results highlight the importance of improving our understanding of mechanisms influencing life history trajectory in Arctic charr to ensure sustainability of harvested Arctic charr populations in a changing climate. Article in Journal/Newspaper Arctic Arctic charr Arctic Cumberland Sound Nunavut Salvelinus alpinus Unknown Arctic Cumberland Sound ENVELOPE(-66.014,-66.014,65.334,65.334) Nunavut Arctic Science 7 2 454 470 |
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Open Polar |
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language |
English French |
topic |
early life otolith arctic charr seasonal growth life history strategy envir |
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early life otolith arctic charr seasonal growth life history strategy envir Gabrielle Grenier Ross F. Tallman Lifelong divergence of growth patterns in Arctic charr life history strategies: implications for sustainable fisheries in a changing climate |
topic_facet |
early life otolith arctic charr seasonal growth life history strategy envir |
description |
Arctic charr (Salvelinus alpinus Linnaeus, 1758) are phenotypically variable with multiple life history strategies including anadromous and freshwater resident individuals. The mechanism determining life history is believed to be set early in life. Anadromous individuals show greater seasonality in growth and feeding after the first seaward migration relative to resident conspecifics. We used otolith growth increment measurements to estimate lifelong growth patterns for 355 individuals with anadromous or resident life history from four populations within Cumberland Sound, Nunavut. Using a general and a generalized linear model, we discovered a linear increase (estimate = 0.006) in growth for both Arctic charr life histories between 1990 and 2016. Resident Arctic charr have lower annual growth (estimate = −0.176) and show a decrease in the annual proportion of summer growth as they age (estimate = −0.042), whereas their anadromous counterparts maintain a higher seasonality in their growth patterns with age. This suggests that growth is indeed important in life history trajectory for Arctic charr and that seasonal growth patterns differ among life histories. The results highlight the importance of improving our understanding of mechanisms influencing life history trajectory in Arctic charr to ensure sustainability of harvested Arctic charr populations in a changing climate. |
format |
Article in Journal/Newspaper |
author |
Gabrielle Grenier Ross F. Tallman |
author_facet |
Gabrielle Grenier Ross F. Tallman |
author_sort |
Gabrielle Grenier |
title |
Lifelong divergence of growth patterns in Arctic charr life history strategies: implications for sustainable fisheries in a changing climate |
title_short |
Lifelong divergence of growth patterns in Arctic charr life history strategies: implications for sustainable fisheries in a changing climate |
title_full |
Lifelong divergence of growth patterns in Arctic charr life history strategies: implications for sustainable fisheries in a changing climate |
title_fullStr |
Lifelong divergence of growth patterns in Arctic charr life history strategies: implications for sustainable fisheries in a changing climate |
title_full_unstemmed |
Lifelong divergence of growth patterns in Arctic charr life history strategies: implications for sustainable fisheries in a changing climate |
title_sort |
lifelong divergence of growth patterns in arctic charr life history strategies: implications for sustainable fisheries in a changing climate |
publisher |
Canadian Science Publishing |
publishDate |
2021 |
url |
https://doi.org/10.1139/as-2019-0032 https://doaj.org/article/6b23840ddf3d4449be170f896e8c31ef |
long_lat |
ENVELOPE(-66.014,-66.014,65.334,65.334) |
geographic |
Arctic Cumberland Sound Nunavut |
geographic_facet |
Arctic Cumberland Sound Nunavut |
genre |
Arctic Arctic charr Arctic Cumberland Sound Nunavut Salvelinus alpinus |
genre_facet |
Arctic Arctic charr Arctic Cumberland Sound Nunavut Salvelinus alpinus |
op_source |
Arctic Science, Vol 7, Iss 2, Pp 454-470 (2021) |
op_relation |
doi:10.1139/as-2019-0032 2368-7460 https://doaj.org/article/6b23840ddf3d4449be170f896e8c31ef |
op_rights |
undefined |
op_doi |
https://doi.org/10.1139/as-2019-0032 |
container_title |
Arctic Science |
container_volume |
7 |
container_issue |
2 |
container_start_page |
454 |
op_container_end_page |
470 |
_version_ |
1766294963264421888 |