tinroИзвестия ТИНРОIzvestiya TINRO1606-99192658-5510ТИНРО10.26428/1606-9919-2022-202-305-315tinro-725Research ArticleБИОЛОГИЧЕСКИЕ РЕСУРСЫBIOLOGICAL RESOURCESЗадержка сигнала стронция в отолитах ювенильной нерки ( Oncorhynchus nerka) во время перехода из пресной в морскую средуStrontium signal lag in otoliths of juvenile sockeye salmon ( Oncorhynchus nerka) during transition from the freshwater to marine environmentshttps://orcid.org/0000-0002-7939-8095КузьменкоЮ.KuzmenkoYu.

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ykuzmen@eoas.ubc.cahttps://orcid.org/0000-0003-4718-4962ХантБ.HuntB. P.V.

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b.hunt@oceans.ubc.cahttps://orcid.org/0000-0002-8712-7789ЕгороваЮ.EgorovaYu.

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yegorova@eoas.ubc.caСпесивыйТ.SpesivyT.

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tim.spesivy@gmail.comДжонсонС.JohnsonS. C.

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Stewart.Johnson@dfo-mpo.gc.cahttps://orcid.org/0000-0002-6145-2129ПахомовЕ.PakhomovE. A.

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epakhomov@eoas.ubc.caДепартамент земных, океанических и атмосферных наук университета Британской КолумбииКанадаDepartment of Earth, Ocean and Atmospheric Sciences, University of British ColumbiaCanadaДепартамент земных, океанических и атмосферных наук университета Британской Колумбии; Институт океана и рыболовства университета Британской Kолумбии; Хакай институтКанадаDepartment of Earth, Ocean and Atmospheric Sciences, University of British Columbia; Institute for the Oceans and Fisheries, University of British Columbia; Hakai InstituteCanadaДепартамент земных, океанических и атмосферных наук университета Британской Колумбии;КанадаDepartment of Earth, Ocean and Atmospheric Sciences, University of British ColumbiaCanadaИнститут океана и рыболовства университета Британской KолумбииКанадаInstitute for the Oceans and Fisheries, University of British ColumbiaCanadaFisheries and Oceans Canada, Тихоокеанская биологическая станцияКанадаFisheries and Oceans Canada, Pacific Biological StationCanada2022280620222022305315Copyright © Кузьменко Ю., Хант Б.P., Егорова Ю., Спесивый Т., Джонсон С.C., Пахомов Е.A., 20222022Кузьменко Ю., Хант Б., Егорова Ю., Спесивый Т., Джонсон С., Пахомов Е.Kuzmenko Y., Hunt B.P., Egorova Y., Spesivy T., Johnson S.C., Pakhomov E.A.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://izvestiya.tinro-center.ru/jour/article/view/725

Изменение концентраций стронция в отолитах рыб повсеместно используется как прокси диадромных миграций. Однако позиция метки стронция по отношению к точной (или истинной) точке перехода оставалась спорной. В этом исследовании была измерена задержка сигнала стронция в отолитах нерки, содержавшейся в экспериментальных условиях, приближенных к условиям, в которых рыба совершает раннюю морскую миграцию. Описанная задержка сигнала стронция составила в среднем 8,2 (СД = 5,1) дня для рыб размером 140–170 мм и массой 30–70 г. Такая задержка может быть видоспецифичной и должна учитываться при расчетах перехода в морскую среду и продолжительности раннего морского периода с использованием концентрации стронция в отолитах нерки.

The shift in strontium (Sr) concentrations in fish otoliths is a commonly used proxy for identification of marine environment entry during diadromous migrations. However, there is still controversy about the appearance of the Sr-based sea entry mark relative to the true point of entry. In this study, the Sr signal lag was assessed in otoliths of juvenile sockeye salmon (Oncorhynchus nerka) under experimental conditions replicating the transition to seawater during juveniles’ seaward migration. A Sr signal delay was observed to average at 8.2 (SD = 5.1) days for fish with a body length of 140–170 mm (and a weight of 30–70 g). This lag may be species-specific and should be taken into consideration when estimating marine entry timing and marine residence duration of juvenile salmon.

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The authors declare that there are no conflicts of interest present.