European eel Anguilla anguilla compromise speed for safety in the early marine spawning migration
There are substantial benefits to potential fitness conferred to animals that undertake migrations. However, animals must make compromises to maximize survival and compensate for the risks associated with long-distance movement. European eel (Anguilla anguilla), a migratory catadromous fish, has und...
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Online Access: | http://hdl.handle.net/11250/2580531 https://doi.org/10.1093/icesjms/fsy104 |
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ftninstnf:oai:brage.nina.no:11250/2580531 2023-05-15T13:27:24+02:00 European eel Anguilla anguilla compromise speed for safety in the early marine spawning migration Lennox, Robert J. Økland, Finn Mitamura, Hiromichi Cooke, Steven J. Thorstad, Eva Bonsak River Opo, river Imsa, Hardangerfjord, Norway, Europe 2018 application/octet-stream http://hdl.handle.net/11250/2580531 https://doi.org/10.1093/icesjms/fsy104 eng eng Andre: Natural Sciences and Engineering Research Council of Canada ICES Journal of Marine Science. 2018, 75 (6), 1984-1991. urn:issn:1054-3139 http://hdl.handle.net/11250/2580531 https://doi.org/10.1093/icesjms/fsy104 cristin:1645051 © International Council for the Exploration of the Sea 2018. All rights reserved. 1984-1991 75 ICES Journal of Marine Science 6 asset protection principle conservation behaviour exploitation fjord telemetry VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 Journal article Peer reviewed 2018 ftninstnf https://doi.org/10.1093/icesjms/fsy104 2021-12-23T07:17:08Z There are substantial benefits to potential fitness conferred to animals that undertake migrations. However, animals must make compromises to maximize survival and compensate for the risks associated with long-distance movement. European eel (Anguilla anguilla), a migratory catadromous fish, has undergone population declines owing to changes in marine and freshwater habitat and interactions with human infrastructure, instigating research to investigate the mechanisms controlling their migration. Yellow-phase European eels from the local River Opo and silver-phase European eels transplanted from River Imsa, Norway, were implanted with acoustic transmitters and released within a network of receiver stations in the Hardangerfjord, Norway. Silver-phase eels exhibited more movement within the array than yellow-phase eels, signifying the onset of migration. Silver-phase eels moved through the fjord nocturnally, arriving at gates predominantly at night. Eels had slower rates of migration than expected based on models predicting continuous movement, suggesting that movement ceased during daylight hours. Reduced net rates of travel supported the hypothesis that eels compromise speed for safety during the early marine migration by avoiding predators and not actively migrating during daylight. The silver eels were capable of directed movement towards the ocean and were not recorded by receivers in bays or dead ends. European eels must successfully transit this coastal zone, where their residence is prolonged because of the relatively slow speeds. These results suggest that the early marine phase of the European eel spawning migration be a focal period for European eel conservation efforts. asset protection principle, conservation behaviour, exploitation, fjord, telemetry acceptedVersion Article in Journal/Newspaper Anguilla anguilla Norwegian Institute for Nature Research: Brage NINA Norway ICES Journal of Marine Science 75 6 1984 1991 |
institution |
Open Polar |
collection |
Norwegian Institute for Nature Research: Brage NINA |
op_collection_id |
ftninstnf |
language |
English |
topic |
asset protection principle conservation behaviour exploitation fjord telemetry VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 |
spellingShingle |
asset protection principle conservation behaviour exploitation fjord telemetry VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 Lennox, Robert J. Økland, Finn Mitamura, Hiromichi Cooke, Steven J. Thorstad, Eva Bonsak European eel Anguilla anguilla compromise speed for safety in the early marine spawning migration |
topic_facet |
asset protection principle conservation behaviour exploitation fjord telemetry VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 |
description |
There are substantial benefits to potential fitness conferred to animals that undertake migrations. However, animals must make compromises to maximize survival and compensate for the risks associated with long-distance movement. European eel (Anguilla anguilla), a migratory catadromous fish, has undergone population declines owing to changes in marine and freshwater habitat and interactions with human infrastructure, instigating research to investigate the mechanisms controlling their migration. Yellow-phase European eels from the local River Opo and silver-phase European eels transplanted from River Imsa, Norway, were implanted with acoustic transmitters and released within a network of receiver stations in the Hardangerfjord, Norway. Silver-phase eels exhibited more movement within the array than yellow-phase eels, signifying the onset of migration. Silver-phase eels moved through the fjord nocturnally, arriving at gates predominantly at night. Eels had slower rates of migration than expected based on models predicting continuous movement, suggesting that movement ceased during daylight hours. Reduced net rates of travel supported the hypothesis that eels compromise speed for safety during the early marine migration by avoiding predators and not actively migrating during daylight. The silver eels were capable of directed movement towards the ocean and were not recorded by receivers in bays or dead ends. European eels must successfully transit this coastal zone, where their residence is prolonged because of the relatively slow speeds. These results suggest that the early marine phase of the European eel spawning migration be a focal period for European eel conservation efforts. asset protection principle, conservation behaviour, exploitation, fjord, telemetry acceptedVersion |
format |
Article in Journal/Newspaper |
author |
Lennox, Robert J. Økland, Finn Mitamura, Hiromichi Cooke, Steven J. Thorstad, Eva Bonsak |
author_facet |
Lennox, Robert J. Økland, Finn Mitamura, Hiromichi Cooke, Steven J. Thorstad, Eva Bonsak |
author_sort |
Lennox, Robert J. |
title |
European eel Anguilla anguilla compromise speed for safety in the early marine spawning migration |
title_short |
European eel Anguilla anguilla compromise speed for safety in the early marine spawning migration |
title_full |
European eel Anguilla anguilla compromise speed for safety in the early marine spawning migration |
title_fullStr |
European eel Anguilla anguilla compromise speed for safety in the early marine spawning migration |
title_full_unstemmed |
European eel Anguilla anguilla compromise speed for safety in the early marine spawning migration |
title_sort |
european eel anguilla anguilla compromise speed for safety in the early marine spawning migration |
publishDate |
2018 |
url |
http://hdl.handle.net/11250/2580531 https://doi.org/10.1093/icesjms/fsy104 |
op_coverage |
River Opo, river Imsa, Hardangerfjord, Norway, Europe |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_source |
1984-1991 75 ICES Journal of Marine Science 6 |
op_relation |
Andre: Natural Sciences and Engineering Research Council of Canada ICES Journal of Marine Science. 2018, 75 (6), 1984-1991. urn:issn:1054-3139 http://hdl.handle.net/11250/2580531 https://doi.org/10.1093/icesjms/fsy104 cristin:1645051 |
op_rights |
© International Council for the Exploration of the Sea 2018. All rights reserved. |
op_doi |
https://doi.org/10.1093/icesjms/fsy104 |
container_title |
ICES Journal of Marine Science |
container_volume |
75 |
container_issue |
6 |
container_start_page |
1984 |
op_container_end_page |
1991 |
_version_ |
1766398160276553728 |