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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NRC Research Press (Canadian Science Publishing)
2021
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Online Access: | https://hdl.handle.net/10037/21838 https://doi.org/10.1139/as-2019-0032 |
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ftunivtroemsoe:oai:munin.uit.no:10037/21838 2023-05-15T14:20:18+02:00 Lifelong divergence of growth patterns in Arctic charr life history strategies: implications for sustainable fisheries in a changing climate Grenier, Gabrielle Tallman, Ross 2021-01-18 https://hdl.handle.net/10037/21838 https://doi.org/10.1139/as-2019-0032 eng eng NRC Research Press (Canadian Science Publishing) Arctic Science Grenier G, Tallman R. Lifelong divergence of growth patterns in Arctic charr life history strategies: implications for sustainable fisheries in a changing climate. Arctic Science. 2021 FRIDAID 1905046 doi:10.1139/as-2019-0032 2368-7460 https://hdl.handle.net/10037/21838 openAccess Copyright 2021 The Author(s) VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2021 ftunivtroemsoe https://doi.org/10.1139/as-2019-0032 2021-07-14T22:52:36Z 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 University of Tromsø: Munin Open Research Archive Arctic Cumberland Sound ENVELOPE(-66.014,-66.014,65.334,65.334) Nunavut Arctic Science 7 2 454 470 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 |
spellingShingle |
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 Grenier, Gabrielle Tallman, Ross Lifelong divergence of growth patterns in Arctic charr life history strategies: implications for sustainable fisheries in a changing climate |
topic_facet |
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 |
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 |
Grenier, Gabrielle Tallman, Ross |
author_facet |
Grenier, Gabrielle Tallman, Ross |
author_sort |
Grenier, Gabrielle |
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 |
NRC Research Press (Canadian Science Publishing) |
publishDate |
2021 |
url |
https://hdl.handle.net/10037/21838 https://doi.org/10.1139/as-2019-0032 |
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_relation |
Arctic Science Grenier G, Tallman R. Lifelong divergence of growth patterns in Arctic charr life history strategies: implications for sustainable fisheries in a changing climate. Arctic Science. 2021 FRIDAID 1905046 doi:10.1139/as-2019-0032 2368-7460 https://hdl.handle.net/10037/21838 |
op_rights |
openAccess Copyright 2021 The Author(s) |
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_ |
1766292129819131904 |