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 moveme...
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ftmdpi:oai:mdpi.com:/2073-4441/13/6/839/ 2023-08-20T03:59:42+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 agris 2021-03-19 application/pdf https://doi.org/10.3390/w13060839 EN eng Multidisciplinary Digital Publishing Institute Biodiversity and Functionality of Aquatic Ecosystems https://dx.doi.org/10.3390/w13060839 https://creativecommons.org/licenses/by/4.0/ Water; Volume 13; Issue 6; Pages: 839 acoustic camera Anguilla anguilla behaviour diadromy dual-frequency sonar migratory fish Text 2021 ftmdpi https://doi.org/10.3390/w13060839 2023-08-01T01:19:20Z 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. Text Anguilla anguilla MDPI Open Access Publishing Aris ENVELOPE(-61.400,-61.400,-70.633,-70.633) Water 13 6 839 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
acoustic camera Anguilla anguilla behaviour diadromy dual-frequency sonar migratory fish |
spellingShingle |
acoustic camera Anguilla anguilla behaviour diadromy dual-frequency sonar migratory fish 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 |
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 |
Text |
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 |
Multidisciplinary Digital Publishing Institute |
publishDate |
2021 |
url |
https://doi.org/10.3390/w13060839 |
op_coverage |
agris |
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; Volume 13; Issue 6; Pages: 839 |
op_relation |
Biodiversity and Functionality of Aquatic Ecosystems https://dx.doi.org/10.3390/w13060839 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/w13060839 |
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Water |
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13 |
container_issue |
6 |
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839 |
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