Data from: Migratory passage structures at hydropower plants as potential physiological and behavioural selective agents ...
Anthropogenic activities affect fish populations worldwide. River dams have profound impacts on ecosystems by changing habitats and hindering migration. In an effort to counteract such effects a diversity of mitigation measures has been installed at hydroelectric power plants. Still, not all individ...
| Main Authors: | , , , , |
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| Format: | Dataset |
| Language: | English |
| Published: |
Dryad
2019
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.5061/dryad.8b876q6 https://datadryad.org/stash/dataset/doi:10.5061/dryad.8b876q6 |
| Summary: | Anthropogenic activities affect fish populations worldwide. River dams have profound impacts on ecosystems by changing habitats and hindering migration. In an effort to counteract such effects a diversity of mitigation measures has been installed at hydroelectric power plants. Still, not all individuals in a population use these measures, creating potentially strong selection processes at hydroelectric power plants. Especially, during migration, when fish can get heavily delayed or pass through a hydropower turbine, facing increased mortality compared to those using a safe bypass route. In this study, we quantify migration route choices of descending wild PIT-tagged Atlantic salmon smolts released upstream from a hydroelectric plant. We demonstrate how only a few meters’ displacement of bypass canals can have a large impact on the fish guidance efficiency. The proportion of fish using the bypasses increased when water was released in surface gates closer to the turbine intake. During a period of low fish ... : R scriptumerk.rstCatches of Atlantic salmon in River RST-trapsall.pit.dataMark recapture data. PIT-tagged Atlantic salmon smoltsFGEdistFish guidance efficiency vs. distance to turbinetime2event.dataData for time-to-event analysis ... |
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