Marine and Freshwater Research Marine and Freshwater Research Society
Advances in the aquatic sciences

Just Accepted

This article has been peer reviewed and accepted for publication. It is in production and has not been edited, so may differ from the final published form.

Low mortality rate in silver eels (Anguilla anguilla L.) passing through a small hydropower station

Rafał Bernaś , Piotr Dębowski , Michał Skóra , Grzegorz Radtke , Jacek Morzuch , Andrzej Kapusta

Abstract

In many regulated rivers, silver eels (Anguilla anguilla L.) experience significant mortality as they pass through small hydropower stations (HPS) during their downstream migration. As the main reasons, destroyed river-ocean connectivity with overfishing led to huge collapse in recruitment of this species. Often the direct mortality caused by small hydro turbines varies between particular places and depends on many factors. The aim of this study was to assess the mortality rate of silvers eels passing through a small HPS equipped with Francis turbine in a small Pomeranian river, using acoustic telemetry. During the experiment, no direct mortality occurred as a result of passage through the HPS turbine. However, three individuals were believed to have suffered from injuries or passage trauma.

MF16396  Accepted 11 March 2017

© CSIRO 2017