On the actual recruitment of European eel ( Anguilla anguilla) in the River Ems, Germany
Abstract Data from the historical River Ems glass eel fisheries in the 20th Century have been used for the ICES recruitment series. Commercial catches ceased from 1980 and dropped to zero; thus, eel recruitment data are since lacking. The present study assessed the actual eel recruitment to the Rive...
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crwiley:10.1111/fme.12314 2024-06-02T07:55:11+00:00 On the actual recruitment of European eel ( Anguilla anguilla) in the River Ems, Germany Diekmann, Markus Simon, Janek Salva, Jens Lower Saxony Ministry for Food, Agriculture and Consumer Protection 2018 http://dx.doi.org/10.1111/fme.12314 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Ffme.12314 https://onlinelibrary.wiley.com/doi/pdf/10.1111/fme.12314 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Fisheries Management and Ecology volume 26, issue 1, page 20-30 ISSN 0969-997X 1365-2400 journal-article 2018 crwiley https://doi.org/10.1111/fme.12314 2024-05-03T10:59:37Z Abstract Data from the historical River Ems glass eel fisheries in the 20th Century have been used for the ICES recruitment series. Commercial catches ceased from 1980 and dropped to zero; thus, eel recruitment data are since lacking. The present study assessed the actual eel recruitment to the River Ems with regard to the local tidal conditions. Standardised measurements were performed on relative glass eel occurrence at the tidal weir from 2014 and quantitative sampling at the next weir upstream from 2013. Eel migration at the tidal weir was dominated by glass eels and increased 2–3 month earlier than at the upstream weir, where migration was dominated by pigmented eels. In 2016, glass eels were marked at the tidal weir and pigmented elvers were sampled at the upstream weir. The 2016 eel recruitment was estimated at about 1% of the mean historical recruitment. Eel recruitment at the two weirs was not directly linked. Many eels seem not to pass the upstream weir. Further investigations are needed to reveal whether the results represent a regular pattern. In the long run, the perpetuation of the recruitment series is also foreseen. Article in Journal/Newspaper Anguilla anguilla Wiley Online Library Weir ENVELOPE(177.167,177.167,-84.983,-84.983) Fisheries Management and Ecology 26 1 20 30 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Data from the historical River Ems glass eel fisheries in the 20th Century have been used for the ICES recruitment series. Commercial catches ceased from 1980 and dropped to zero; thus, eel recruitment data are since lacking. The present study assessed the actual eel recruitment to the River Ems with regard to the local tidal conditions. Standardised measurements were performed on relative glass eel occurrence at the tidal weir from 2014 and quantitative sampling at the next weir upstream from 2013. Eel migration at the tidal weir was dominated by glass eels and increased 2–3 month earlier than at the upstream weir, where migration was dominated by pigmented eels. In 2016, glass eels were marked at the tidal weir and pigmented elvers were sampled at the upstream weir. The 2016 eel recruitment was estimated at about 1% of the mean historical recruitment. Eel recruitment at the two weirs was not directly linked. Many eels seem not to pass the upstream weir. Further investigations are needed to reveal whether the results represent a regular pattern. In the long run, the perpetuation of the recruitment series is also foreseen. |
author2 |
Lower Saxony Ministry for Food, Agriculture and Consumer Protection |
format |
Article in Journal/Newspaper |
author |
Diekmann, Markus Simon, Janek Salva, Jens |
spellingShingle |
Diekmann, Markus Simon, Janek Salva, Jens On the actual recruitment of European eel ( Anguilla anguilla) in the River Ems, Germany |
author_facet |
Diekmann, Markus Simon, Janek Salva, Jens |
author_sort |
Diekmann, Markus |
title |
On the actual recruitment of European eel ( Anguilla anguilla) in the River Ems, Germany |
title_short |
On the actual recruitment of European eel ( Anguilla anguilla) in the River Ems, Germany |
title_full |
On the actual recruitment of European eel ( Anguilla anguilla) in the River Ems, Germany |
title_fullStr |
On the actual recruitment of European eel ( Anguilla anguilla) in the River Ems, Germany |
title_full_unstemmed |
On the actual recruitment of European eel ( Anguilla anguilla) in the River Ems, Germany |
title_sort |
on the actual recruitment of european eel ( anguilla anguilla) in the river ems, germany |
publisher |
Wiley |
publishDate |
2018 |
url |
http://dx.doi.org/10.1111/fme.12314 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Ffme.12314 https://onlinelibrary.wiley.com/doi/pdf/10.1111/fme.12314 |
long_lat |
ENVELOPE(177.167,177.167,-84.983,-84.983) |
geographic |
Weir |
geographic_facet |
Weir |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_source |
Fisheries Management and Ecology volume 26, issue 1, page 20-30 ISSN 0969-997X 1365-2400 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/fme.12314 |
container_title |
Fisheries Management and Ecology |
container_volume |
26 |
container_issue |
1 |
container_start_page |
20 |
op_container_end_page |
30 |
_version_ |
1800746715885600768 |