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dc.contributor.authorGrenier, Gabrielle
dc.contributor.authorTallman, Ross
dc.date.accessioned2021-07-08T09:06:57Z
dc.date.available2021-07-08T09:06:57Z
dc.date.issued2021-01-18
dc.description.abstractArctic charr (<i>Salvelinus alpinus</i> 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.en_US
dc.identifier.citationGrenier G, Tallman R. Lifelong divergence of growth patterns in Arctic charr life history strategies: implications for sustainable fisheries in a changing climate. Arctic Science. 2021en_US
dc.identifier.cristinIDFRIDAID 1905046
dc.identifier.doi10.1139/as-2019-0032
dc.identifier.issn2368-7460
dc.identifier.urihttps://hdl.handle.net/10037/21838
dc.language.isoengen_US
dc.publisherNRC Research Press (Canadian Science Publishing)en_US
dc.relation.journalArctic Science
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2021 The Author(s)en_US
dc.subjectVDP::Agriculture and fishery disciplines: 900::Fisheries science: 920en_US
dc.subjectVDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920en_US
dc.titleLifelong divergence of growth patterns in Arctic charr life history strategies: implications for sustainable fisheries in a changing climateen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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