<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The European eel is a highly threatened species according the European Inland Fisheries Advisory Commission (EIFAC) and the Food and Agriculture Organization of the United Nations (FAO). The recruitment of this species has collapsed over the last fifty years primarily because of the destruction of free migration routes and overfishing. One of the most important factors linked to population decline is mortality during catadromous migration caused by hydroelectric facilities. The aim of the present study was to assess the mortality rate of silvers eel passing through two small hydroelectric facilities. Total mortality at the site was 5%, but it was 15% for fish passing through the two hydroelectric facilities. However, the cumulative mortality in the river basin studied, which has many hydroelectric facilities, indicated that silver eel escapement from the Słupia drainage basin was very low.</p></abstract>

The European eel is a highly threatened species according the European Inland Fisheries Advisory Commission (EIFAC) and the Food and Agriculture Organization of the United Nations (FAO). The recruitment of this species has collapsed over the last fifty years primarily because of the destruction of free migration routes and overfishing. One of the most important factors linked to population decline is mortality during catadromous migration caused by hydroelectric facilities. The aim of the present study was to assess the mortality rate of silvers eel passing through two small hydroelectric facilities. Total mortality at the site was 5%, but it was 15% for fish passing through the two hydroelectric facilities. However, the cumulative mortality in the river basin studied, which has many hydroelectric facilities, indicated that silver eel escapement from the Słupia drainage basin was very low.

Route selection, migration speed, and mortality of silver eel passing through two small hydroelectric facilities

Fisheries & Aquatic Life

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The European eel is a highly threatened species according the European Inland Fisheries Advisory Commission (EIFAC) and the Food and Agriculture Organization...

Route selection, migration speed, and mortality of silver eel passing through two small hydroelectric facilities

Article Category: Research Article

Published Online: Nov 18, 2020

Page range: 133 - 140

Received: Jan 22, 2020

Accepted: Sep 21, 2020

DOI: https://doi.org/10.2478/aopf-2020-0016

Keywords
silver eel migration, mortality, Francis turbine

© 2020 Piotr Dębowski et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Route selection, migration speed, and mortality of silver eel passing through two small hydroelectric facilities

Article Category: Research Article

Published Online: Nov 18, 2020

Page range: 133 - 140

Received: Jan 22, 2020

Accepted: Sep 21, 2020

DOI: https://doi.org/10.2478/aopf-2020-0016

Keywordssilver eel migration, mortality, Francis turbine

© 2020 Piotr Dębowski et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
silver eel migration, mortality, Francis turbine