Migratory passage structures at hydropower plants as potential physiological and behavioural selective agents.

ABSTRACT: 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 range of mitigation measures have been installed at hydroelectric power plants. However, not all individuals in a population use these measures, potentially creating strong selection processes at hydroelectric power plants. This may be especially true during migration; fish can get heavily delayed or pass through a hydropower turbine, thus facing increased mortality compared with those using a safe bypass route. In this study, we quantify migration route choices of descending wild passive integrated transponder (PIT)-tagged Atlantic salmon smolts released upstream from a hydroelectric plant. We de

SUBMITTER: Haraldstad T 

PROVIDER: S-EPMC6894575 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature