Movements of Non-Migrant European Eels in an Urbanised Channel Linking a Mediterranean Lagoon to the Sea
Transitional ecosystems and, particularly, Mediterranean lagoons represent important habitats for the European eel ( Anguilla anguilla ) population. In these habitats many anthropogenic pressures can disturb eel movements and, in turn, negatively affect the population. Despite the importance of move...
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MDPI AG
2021
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ftdoajarticles:oai:doaj.org/article:8939ada081a749efb6949f7dae972309 2023-05-15T13:27:14+02:00 Movements of Non-Migrant European Eels in an Urbanised Channel Linking a Mediterranean Lagoon to the Sea Raphaël Lagarde Jason Peyre Elsa Amilhat François Bourrin François Prellwitz Gaël Simon Elisabeth Faliex 2021-03-01T00:00:00Z https://doi.org/10.3390/w13060839 https://doaj.org/article/8939ada081a749efb6949f7dae972309 EN eng MDPI AG https://www.mdpi.com/2073-4441/13/6/839 https://doaj.org/toc/2073-4441 doi:10.3390/w13060839 2073-4441 https://doaj.org/article/8939ada081a749efb6949f7dae972309 Water, Vol 13, Iss 839, p 839 (2021) acoustic camera Anguilla anguilla behaviour diadromy dual-frequency sonar migratory fish Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 article 2021 ftdoajarticles https://doi.org/10.3390/w13060839 2022-12-31T05:14:47Z Transitional ecosystems and, particularly, Mediterranean lagoons represent important habitats for the European eel ( Anguilla anguilla ) population. In these habitats many anthropogenic pressures can disturb eel movements and, in turn, negatively affect the population. Despite the importance of movements during the non-migrant growing stage in eels, this topic is understudied in Mediterranean lagoons. We thus aim to describe the diel and seasonal phenology and the effect of environmental drivers on non-migrant eel movements. Videos obtained from an Adaptive Resolution Imaging Sonar (ARIS) acoustic camera that continuously recorded from October 2018 to April 2020 were processed to evaluate the daily number of eels swimming toward the lagoon. More than 60% of the 7207 eels observed were females with a size >45 cm. Movements were year-round and predominantly during the night. A Boosted Regression Tree analysis demonstrated that, among the 10 environmental drivers studied, flow velocity, water temperature, discharge of the main tributary, wind velocity and atmospheric pressure, had the strongest influence on eel movement activity. Non-migrant eel movements should be better incorporated into lagoon management plans through actions such as limiting dredging activities from 18:00 to midnight, especially when the water flows toward the lagoon and when the water temperature is higher than 12 °C. Article in Journal/Newspaper Anguilla anguilla Directory of Open Access Journals: DOAJ Articles Aris ENVELOPE(-61.400,-61.400,-70.633,-70.633) Water 13 6 839 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
acoustic camera Anguilla anguilla behaviour diadromy dual-frequency sonar migratory fish Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 |
spellingShingle |
acoustic camera Anguilla anguilla behaviour diadromy dual-frequency sonar migratory fish Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 Raphaël Lagarde Jason Peyre Elsa Amilhat François Bourrin François Prellwitz Gaël Simon Elisabeth Faliex Movements of Non-Migrant European Eels in an Urbanised Channel Linking a Mediterranean Lagoon to the Sea |
topic_facet |
acoustic camera Anguilla anguilla behaviour diadromy dual-frequency sonar migratory fish Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 |
description |
Transitional ecosystems and, particularly, Mediterranean lagoons represent important habitats for the European eel ( Anguilla anguilla ) population. In these habitats many anthropogenic pressures can disturb eel movements and, in turn, negatively affect the population. Despite the importance of movements during the non-migrant growing stage in eels, this topic is understudied in Mediterranean lagoons. We thus aim to describe the diel and seasonal phenology and the effect of environmental drivers on non-migrant eel movements. Videos obtained from an Adaptive Resolution Imaging Sonar (ARIS) acoustic camera that continuously recorded from October 2018 to April 2020 were processed to evaluate the daily number of eels swimming toward the lagoon. More than 60% of the 7207 eels observed were females with a size >45 cm. Movements were year-round and predominantly during the night. A Boosted Regression Tree analysis demonstrated that, among the 10 environmental drivers studied, flow velocity, water temperature, discharge of the main tributary, wind velocity and atmospheric pressure, had the strongest influence on eel movement activity. Non-migrant eel movements should be better incorporated into lagoon management plans through actions such as limiting dredging activities from 18:00 to midnight, especially when the water flows toward the lagoon and when the water temperature is higher than 12 °C. |
format |
Article in Journal/Newspaper |
author |
Raphaël Lagarde Jason Peyre Elsa Amilhat François Bourrin François Prellwitz Gaël Simon Elisabeth Faliex |
author_facet |
Raphaël Lagarde Jason Peyre Elsa Amilhat François Bourrin François Prellwitz Gaël Simon Elisabeth Faliex |
author_sort |
Raphaël Lagarde |
title |
Movements of Non-Migrant European Eels in an Urbanised Channel Linking a Mediterranean Lagoon to the Sea |
title_short |
Movements of Non-Migrant European Eels in an Urbanised Channel Linking a Mediterranean Lagoon to the Sea |
title_full |
Movements of Non-Migrant European Eels in an Urbanised Channel Linking a Mediterranean Lagoon to the Sea |
title_fullStr |
Movements of Non-Migrant European Eels in an Urbanised Channel Linking a Mediterranean Lagoon to the Sea |
title_full_unstemmed |
Movements of Non-Migrant European Eels in an Urbanised Channel Linking a Mediterranean Lagoon to the Sea |
title_sort |
movements of non-migrant european eels in an urbanised channel linking a mediterranean lagoon to the sea |
publisher |
MDPI AG |
publishDate |
2021 |
url |
https://doi.org/10.3390/w13060839 https://doaj.org/article/8939ada081a749efb6949f7dae972309 |
long_lat |
ENVELOPE(-61.400,-61.400,-70.633,-70.633) |
geographic |
Aris |
geographic_facet |
Aris |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_source |
Water, Vol 13, Iss 839, p 839 (2021) |
op_relation |
https://www.mdpi.com/2073-4441/13/6/839 https://doaj.org/toc/2073-4441 doi:10.3390/w13060839 2073-4441 https://doaj.org/article/8939ada081a749efb6949f7dae972309 |
op_doi |
https://doi.org/10.3390/w13060839 |
container_title |
Water |
container_volume |
13 |
container_issue |
6 |
container_start_page |
839 |
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1766397206825271296 |