Mortality of silver eel (Anguilla anguilla) migrating downstream through a small hydroelectric plant on the Drawa River in northern Poland
The European eel, Anguilla anguilla L., is an endangered species. Barriers to its downstream spawning migration are one of the greatest threats this species faces. There are hundreds of hydroelectric plants (HEP) on rivers in Poland (> 600), and thousands throughout Europe. Eel that pass through...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Sciendo
2016-06-01
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| Series: | Archives of Polish Fisheries |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/aopf-2016-0008 |
| _version_ | 1818578544719036416 |
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| author | Dębowski Piotr Bernaś Rafał Skóra Michał Morzuch Jacek |
| author_facet | Dębowski Piotr Bernaś Rafał Skóra Michał Morzuch Jacek |
| author_sort | Dębowski Piotr |
| collection | DOAJ |
| description | The European eel, Anguilla anguilla L., is an endangered species. Barriers to its downstream spawning migration are one of the greatest threats this species faces. There are hundreds of hydroelectric plants (HEP) on rivers in Poland (> 600), and thousands throughout Europe. Eel that pass through HEP turbines as they migrate downstream suffer high mortality, but this depends mainly on local and technical conditions. Silver eel mortality was estimated and the possibility of the fish bypassing the turbines was studied between November 2013 and June 2014 at a typical HEP in northern Poland. Two telemetry methods were used with 49 eel: passive integrated transponder (PIT) system and acoustic telemetry. Fifty five percent of eel migrated downstream in fall 2013, soon after their release, and 45% migrated the next spring. The eel did not use the fish passes designed for upstream migration; thus, they were forced to go through the turbines, which resulted in 55% mortality. HEPs cause interruptions and delays in eel spawning migrations and are responsible for high eel mortality. This can make implementing an eel restitution plan difficult or even impossible in river systems with many barriers. |
| first_indexed | 2024-12-16T06:47:30Z |
| format | Article |
| id | doaj.art-605650c340db496f8ef4920a6f28d640 |
| institution | Directory Open Access Journal |
| issn | 2083-6139 |
| language | English |
| last_indexed | 2024-12-16T06:47:30Z |
| publishDate | 2016-06-01 |
| publisher | Sciendo |
| record_format | Article |
| series | Archives of Polish Fisheries |
| spelling | doaj.art-605650c340db496f8ef4920a6f28d6402022-12-21T22:40:30ZengSciendoArchives of Polish Fisheries2083-61392016-06-01242697510.1515/aopf-2016-0008aopf-2016-0008Mortality of silver eel (Anguilla anguilla) migrating downstream through a small hydroelectric plant on the Drawa River in northern PolandDębowski Piotr0Bernaś Rafał1Skóra Michał2Morzuch Jacek3Department of Migratory Fishes in Rutki, Inland Fisheries Institute in Olsztyn, PolandDepartment of Migratory Fishes in Rutki, Inland Fisheries Institute in Olsztyn, PolandDepartment of Migratory Fishes in Rutki, Inland Fisheries Institute in Olsztyn, PolandDepartment of Migratory Fishes in Rutki, Inland Fisheries Institute in Olsztyn, PolandThe European eel, Anguilla anguilla L., is an endangered species. Barriers to its downstream spawning migration are one of the greatest threats this species faces. There are hundreds of hydroelectric plants (HEP) on rivers in Poland (> 600), and thousands throughout Europe. Eel that pass through HEP turbines as they migrate downstream suffer high mortality, but this depends mainly on local and technical conditions. Silver eel mortality was estimated and the possibility of the fish bypassing the turbines was studied between November 2013 and June 2014 at a typical HEP in northern Poland. Two telemetry methods were used with 49 eel: passive integrated transponder (PIT) system and acoustic telemetry. Fifty five percent of eel migrated downstream in fall 2013, soon after their release, and 45% migrated the next spring. The eel did not use the fish passes designed for upstream migration; thus, they were forced to go through the turbines, which resulted in 55% mortality. HEPs cause interruptions and delays in eel spawning migrations and are responsible for high eel mortality. This can make implementing an eel restitution plan difficult or even impossible in river systems with many barriers.https://doi.org/10.1515/aopf-2016-0008eelhydroelectric plantmortalityspawning migration |
| spellingShingle | Dębowski Piotr Bernaś Rafał Skóra Michał Morzuch Jacek Mortality of silver eel (Anguilla anguilla) migrating downstream through a small hydroelectric plant on the Drawa River in northern Poland Archives of Polish Fisheries eel hydroelectric plant mortality spawning migration |
| title | Mortality of silver eel (Anguilla anguilla) migrating downstream through a small hydroelectric plant on the Drawa River in northern Poland |
| title_full | Mortality of silver eel (Anguilla anguilla) migrating downstream through a small hydroelectric plant on the Drawa River in northern Poland |
| title_fullStr | Mortality of silver eel (Anguilla anguilla) migrating downstream through a small hydroelectric plant on the Drawa River in northern Poland |
| title_full_unstemmed | Mortality of silver eel (Anguilla anguilla) migrating downstream through a small hydroelectric plant on the Drawa River in northern Poland |
| title_short | Mortality of silver eel (Anguilla anguilla) migrating downstream through a small hydroelectric plant on the Drawa River in northern Poland |
| title_sort | mortality of silver eel anguilla anguilla migrating downstream through a small hydroelectric plant on the drawa river in northern poland |
| topic | eel hydroelectric plant mortality spawning migration |
| url | https://doi.org/10.1515/aopf-2016-0008 |
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