Задержка сигнала стронция в отолитах ювенильной нерки ( Oncorhynchus nerka) во время перехода из пресной в морскую среду

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.

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