Environmental DNA analysis indicates that migration barriers are decreasing the occurrence of European eel (Anguilla anguilla) in distance from the sea
The European eel (Anguilla L.) is considered critically endangered by the IUCN Red List, and recruitment remains low. One of the challenges for the species today is migration barriers that limit their habitat. Along the Norwegian coast, like in other countries, the abundance of eels appears to decre...
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ftdoajarticles:oai:doaj.org/article:38e4862369c94903a2eef81bc0381dc3 2023-05-15T13:27:18+02:00 Environmental DNA analysis indicates that migration barriers are decreasing the occurrence of European eel (Anguilla anguilla) in distance from the sea Silje Halvorsen Lars Korslund Per Ø. Gustavsen Audun Slettan 2020-12-01T00:00:00Z https://doi.org/10.1016/j.gecco.2020.e01245 https://doaj.org/article/38e4862369c94903a2eef81bc0381dc3 EN eng Elsevier http://www.sciencedirect.com/science/article/pii/S2351989420307861 https://doaj.org/toc/2351-9894 2351-9894 doi:10.1016/j.gecco.2020.e01245 https://doaj.org/article/38e4862369c94903a2eef81bc0381dc3 Global Ecology and Conservation, Vol 24, Iss , Pp e01245- (2020) Environmental DNA Anguilla Anguilla Passage barriers Conservation Real-time PCR Ecology QH540-549.5 article 2020 ftdoajarticles https://doi.org/10.1016/j.gecco.2020.e01245 2022-12-31T06:56:41Z The European eel (Anguilla L.) is considered critically endangered by the IUCN Red List, and recruitment remains low. One of the challenges for the species today is migration barriers that limit their habitat. Along the Norwegian coast, like in other countries, the abundance of eels appears to decrease with distance from the sea. This pattern may be a result of factors like water temperature, water quality, competition, and habitat suitability and availability. This study aims to use environmental DNA (eDNA) analysis to investigate the potential relationship between migration barriers and the decreasing occurrence of eels in distance from the sea by the coast of southern Norway. Sixty locations with potential migration barriers are investigated by collecting water samples upstream and downstream from each construction before eDNA from each sample is isolated and analyzed by real-time PCR with specific primers and probes matching A. anguilla. The results reveal that the probability of detecting eel eDNA decreases significantly with number of hydroelectric power stations and their associated basins, even when the effect of distance to sea is accounted for. In addition, there is a clear border at which eel eDNA could no longer be detected upstream of the major watercourses. Therefore, it is likely that the migration of eels is prohibited by these constructions, which seem to constitute a much greater challenge than every other type of potential migration barrier investigated in this study. Article in Journal/Newspaper Anguilla anguilla European eel Directory of Open Access Journals: DOAJ Articles Norway Global Ecology and Conservation 24 e01245 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental DNA Anguilla Anguilla Passage barriers Conservation Real-time PCR Ecology QH540-549.5 |
spellingShingle |
Environmental DNA Anguilla Anguilla Passage barriers Conservation Real-time PCR Ecology QH540-549.5 Silje Halvorsen Lars Korslund Per Ø. Gustavsen Audun Slettan Environmental DNA analysis indicates that migration barriers are decreasing the occurrence of European eel (Anguilla anguilla) in distance from the sea |
topic_facet |
Environmental DNA Anguilla Anguilla Passage barriers Conservation Real-time PCR Ecology QH540-549.5 |
description |
The European eel (Anguilla L.) is considered critically endangered by the IUCN Red List, and recruitment remains low. One of the challenges for the species today is migration barriers that limit their habitat. Along the Norwegian coast, like in other countries, the abundance of eels appears to decrease with distance from the sea. This pattern may be a result of factors like water temperature, water quality, competition, and habitat suitability and availability. This study aims to use environmental DNA (eDNA) analysis to investigate the potential relationship between migration barriers and the decreasing occurrence of eels in distance from the sea by the coast of southern Norway. Sixty locations with potential migration barriers are investigated by collecting water samples upstream and downstream from each construction before eDNA from each sample is isolated and analyzed by real-time PCR with specific primers and probes matching A. anguilla. The results reveal that the probability of detecting eel eDNA decreases significantly with number of hydroelectric power stations and their associated basins, even when the effect of distance to sea is accounted for. In addition, there is a clear border at which eel eDNA could no longer be detected upstream of the major watercourses. Therefore, it is likely that the migration of eels is prohibited by these constructions, which seem to constitute a much greater challenge than every other type of potential migration barrier investigated in this study. |
format |
Article in Journal/Newspaper |
author |
Silje Halvorsen Lars Korslund Per Ø. Gustavsen Audun Slettan |
author_facet |
Silje Halvorsen Lars Korslund Per Ø. Gustavsen Audun Slettan |
author_sort |
Silje Halvorsen |
title |
Environmental DNA analysis indicates that migration barriers are decreasing the occurrence of European eel (Anguilla anguilla) in distance from the sea |
title_short |
Environmental DNA analysis indicates that migration barriers are decreasing the occurrence of European eel (Anguilla anguilla) in distance from the sea |
title_full |
Environmental DNA analysis indicates that migration barriers are decreasing the occurrence of European eel (Anguilla anguilla) in distance from the sea |
title_fullStr |
Environmental DNA analysis indicates that migration barriers are decreasing the occurrence of European eel (Anguilla anguilla) in distance from the sea |
title_full_unstemmed |
Environmental DNA analysis indicates that migration barriers are decreasing the occurrence of European eel (Anguilla anguilla) in distance from the sea |
title_sort |
environmental dna analysis indicates that migration barriers are decreasing the occurrence of european eel (anguilla anguilla) in distance from the sea |
publisher |
Elsevier |
publishDate |
2020 |
url |
https://doi.org/10.1016/j.gecco.2020.e01245 https://doaj.org/article/38e4862369c94903a2eef81bc0381dc3 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Anguilla anguilla European eel |
genre_facet |
Anguilla anguilla European eel |
op_source |
Global Ecology and Conservation, Vol 24, Iss , Pp e01245- (2020) |
op_relation |
http://www.sciencedirect.com/science/article/pii/S2351989420307861 https://doaj.org/toc/2351-9894 2351-9894 doi:10.1016/j.gecco.2020.e01245 https://doaj.org/article/38e4862369c94903a2eef81bc0381dc3 |
op_doi |
https://doi.org/10.1016/j.gecco.2020.e01245 |
container_title |
Global Ecology and Conservation |
container_volume |
24 |
container_start_page |
e01245 |
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1766397613280591872 |