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- W2797713995 abstract "Repeat spawners of anadromous salmonids may contribute significantly to population resilience by providing multiple cohorts to both seawater and freshwater life stages. In this study, winter survival of sea trout (Salmo trutta Linnaeus, 1758) post spawners (kelts) was 89%. Sea survival increased linearly with female length with a return probability between 30% and 50%, whereas males attained a maximum return probability of 60% at 520 mm. Of the returning sea trout, 40% skipped spawning and they had significantly lower condition factor as kelts compared with those who returned after one summer. These results suggest that sex-specific differences in individual post-spawning growth–survival trade-off exist and that energetic status of descending kelts may influence the probability to skip spawning. We discuss to what extent hydropower may reduce post-spawning survival due to blocking of river descent opportunities, potentially altering the fitness landscape and favouring new life-history adaptations. From a management perspective, it is concluded that it is crucial to maintain connectivity in regulated rivers, allowing fish to complete repetitive spawning and feeding migrations, thus contributing to population productivity." @default.
- W2797713995 created "2018-04-24" @default.
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- W2797713995 date "2018-12-01" @default.
- W2797713995 modified "2023-10-16" @default.
- W2797713995 title "Condition-dependent skipped spawning in anadromous brown trout (<i>Salmo trutta</i>)" @default.
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- W2797713995 doi "https://doi.org/10.1139/cjfas-2017-0076" @default.
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