Dispersal in metamorphosing juvenile eel Anguilla anguilla
International audience The morphological, physiological and behavioural changes occurring during metamorphosis reveal adaptations to drastic shifts in habitat and life style. We have investigated how dispersal behaviour changed during completion of the larval metamorphosis in migrating European eels...
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ftccsdartic:oai:HAL:hal-02589375v1 2023-05-15T13:26:54+02:00 Dispersal in metamorphosing juvenile eel Anguilla anguilla Edeline, Eric Beaulaton, Laurent Le Barh, Romaric Elie, Pierre Ecosystèmes estuariens et poissons migrateurs amphihalins (UR EPBX) Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF) 2007 https://hal.inrae.fr/hal-02589375 en eng HAL CCSD Inter Research hal-02589375 https://hal.inrae.fr/hal-02589375 IRSTEA: PUB00022202 ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series https://hal.inrae.fr/hal-02589375 Marine Ecology Progress Series, Inter Research, 2007, 344, pp.213-218 [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2007 ftccsdartic 2021-10-17T00:03:19Z International audience The morphological, physiological and behavioural changes occurring during metamorphosis reveal adaptations to drastic shifts in habitat and life style. We have investigated how dispersal behaviour changed during completion of the larval metamorphosis in migrating European eels Anguilla anguilla, as they reached the limit between the tidal and non-tidal parts of a large river. We show that late-metamorphic glass eels arriving from the sea rapidly migrated in the freshwater zone of the upper estuary by means of selective tidal stream transport. Then, due to the loss of tidal advection and despite the absence of an osmotic barrier, glass eels accumulated at the break point of tidal streams. Newly transformed small yellow eels were homogeneously distributed around the point where they initially accumulated as glass eels. This suggests that completion of larval metamorphosis induced the end of upstream migration (settlement) and a switch to density-dependent dispersal linked to food search. This ontogenetic pattern probably evolved to maximise growth through optimal utilisation of productive marine and estuarine habitats. Article in Journal/Newspaper Anguilla anguilla Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDE]Environmental Sciences |
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[SDE]Environmental Sciences Edeline, Eric Beaulaton, Laurent Le Barh, Romaric Elie, Pierre Dispersal in metamorphosing juvenile eel Anguilla anguilla |
topic_facet |
[SDE]Environmental Sciences |
description |
International audience The morphological, physiological and behavioural changes occurring during metamorphosis reveal adaptations to drastic shifts in habitat and life style. We have investigated how dispersal behaviour changed during completion of the larval metamorphosis in migrating European eels Anguilla anguilla, as they reached the limit between the tidal and non-tidal parts of a large river. We show that late-metamorphic glass eels arriving from the sea rapidly migrated in the freshwater zone of the upper estuary by means of selective tidal stream transport. Then, due to the loss of tidal advection and despite the absence of an osmotic barrier, glass eels accumulated at the break point of tidal streams. Newly transformed small yellow eels were homogeneously distributed around the point where they initially accumulated as glass eels. This suggests that completion of larval metamorphosis induced the end of upstream migration (settlement) and a switch to density-dependent dispersal linked to food search. This ontogenetic pattern probably evolved to maximise growth through optimal utilisation of productive marine and estuarine habitats. |
author2 |
Ecosystèmes estuariens et poissons migrateurs amphihalins (UR EPBX) Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF) |
format |
Article in Journal/Newspaper |
author |
Edeline, Eric Beaulaton, Laurent Le Barh, Romaric Elie, Pierre |
author_facet |
Edeline, Eric Beaulaton, Laurent Le Barh, Romaric Elie, Pierre |
author_sort |
Edeline, Eric |
title |
Dispersal in metamorphosing juvenile eel Anguilla anguilla |
title_short |
Dispersal in metamorphosing juvenile eel Anguilla anguilla |
title_full |
Dispersal in metamorphosing juvenile eel Anguilla anguilla |
title_fullStr |
Dispersal in metamorphosing juvenile eel Anguilla anguilla |
title_full_unstemmed |
Dispersal in metamorphosing juvenile eel Anguilla anguilla |
title_sort |
dispersal in metamorphosing juvenile eel anguilla anguilla |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.inrae.fr/hal-02589375 |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_source |
ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series https://hal.inrae.fr/hal-02589375 Marine Ecology Progress Series, Inter Research, 2007, 344, pp.213-218 |
op_relation |
hal-02589375 https://hal.inrae.fr/hal-02589375 IRSTEA: PUB00022202 |
_version_ |
1766395250629148672 |