The relationship between migration behavior and energetic status in the European glass eel (Anguilla anguilla)
Résumé en anglais : The European eel (Anguilla anguilla) present a complex life cycle with a glass eel stage migrating up estuary to reach river for growth. However, this estuarine migration is known to be facultative, with some individuals settling at sea, in estuaries or alternating stays in river...
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ftccsdartic:oai:HAL:tel-03411097v1 2023-05-15T13:26:52+02:00 The relationship between migration behavior and energetic status in the European glass eel (Anguilla anguilla) Relation entre le comportement migratoire et le statut énergétique de la civelle d'anguille européenne (Anguilla anguilla) Liu, Hengtong Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Université de Pau et des Pays de l'Adour Valérie Bolliet 2020-09-29 https://tel.archives-ouvertes.fr/tel-03411097 https://tel.archives-ouvertes.fr/tel-03411097/document https://tel.archives-ouvertes.fr/tel-03411097/file/thesishengtongliu.pdf en eng HAL CCSD NNT: 2020PAUU3014 tel-03411097 https://tel.archives-ouvertes.fr/tel-03411097 https://tel.archives-ouvertes.fr/tel-03411097/document https://tel.archives-ouvertes.fr/tel-03411097/file/thesishengtongliu.pdf info:eu-repo/semantics/OpenAccess https://tel.archives-ouvertes.fr/tel-03411097 Cellular Biology. Université de Pau et des Pays de l'Adour, 2020. English. ⟨NNT : 2020PAUU3014⟩ Anguilla anguilla Glass eel Facultative migration Metabolism Autophagy Methylmercury Stress Civelle Migration facultative Métabolisme Autophagie Méthylmercure [SDV.BC]Life Sciences [q-bio]/Cellular Biology info:eu-repo/semantics/doctoralThesis Theses 2020 ftccsdartic 2021-11-06T23:25:10Z Résumé en anglais : The European eel (Anguilla anguilla) present a complex life cycle with a glass eel stage migrating up estuary to reach river for growth. However, this estuarine migration is known to be facultative, with some individuals settling at sea, in estuaries or alternating stays in rivers and estuaries. As glass eels feed little or not at all during their migration, their divergent migration patterns may be closely associated with individual’s body condition. To date, one major theory of conditional strategy proposed that the facultative migration in European glass eels is based on energy stores, the individuals with a high migratory capacity presenting high energy stores. However, this theory has been proved controversial and the aim of this thesis was to investigate the conditional strategy in European glass eels based on more comprehensive measures of energetic status, including not only energy stores but also energy mobilization (metabolism and energy-related genes expression). We also focused on both autumn and spring glass eels, which present dramatic difference in energy stores. We first characterized the individual energetic status of marine glass eels sampled in autumn and spring and related this status to their migration behavior assessed in experimental facilities. Autumn glass eels presented higher energy stores and a higher ability to produce energy than spring ones. This confirmed that autumn and spring glass eels present strong differences in their energetic status and that they have to be studied separately. We hypothesized that a potential threshold in energetic status may exist below which migration could be conditioned by energetics. Then, to unveil the underlying mechanisms of settlement processes in estuaries in relation to energy-based conditional strategy, we investigated the relationship between energetic status and migration behavior in both marine and estuarine glass eels. Estuarine individuals displayed lower weight than marine ones in autumn but not in spring supporting ... Doctoral or Postdoctoral Thesis Anguilla anguilla Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
Anguilla anguilla Glass eel Facultative migration Metabolism Autophagy Methylmercury Stress Civelle Migration facultative Métabolisme Autophagie Méthylmercure [SDV.BC]Life Sciences [q-bio]/Cellular Biology |
spellingShingle |
Anguilla anguilla Glass eel Facultative migration Metabolism Autophagy Methylmercury Stress Civelle Migration facultative Métabolisme Autophagie Méthylmercure [SDV.BC]Life Sciences [q-bio]/Cellular Biology Liu, Hengtong The relationship between migration behavior and energetic status in the European glass eel (Anguilla anguilla) |
topic_facet |
Anguilla anguilla Glass eel Facultative migration Metabolism Autophagy Methylmercury Stress Civelle Migration facultative Métabolisme Autophagie Méthylmercure [SDV.BC]Life Sciences [q-bio]/Cellular Biology |
description |
Résumé en anglais : The European eel (Anguilla anguilla) present a complex life cycle with a glass eel stage migrating up estuary to reach river for growth. However, this estuarine migration is known to be facultative, with some individuals settling at sea, in estuaries or alternating stays in rivers and estuaries. As glass eels feed little or not at all during their migration, their divergent migration patterns may be closely associated with individual’s body condition. To date, one major theory of conditional strategy proposed that the facultative migration in European glass eels is based on energy stores, the individuals with a high migratory capacity presenting high energy stores. However, this theory has been proved controversial and the aim of this thesis was to investigate the conditional strategy in European glass eels based on more comprehensive measures of energetic status, including not only energy stores but also energy mobilization (metabolism and energy-related genes expression). We also focused on both autumn and spring glass eels, which present dramatic difference in energy stores. We first characterized the individual energetic status of marine glass eels sampled in autumn and spring and related this status to their migration behavior assessed in experimental facilities. Autumn glass eels presented higher energy stores and a higher ability to produce energy than spring ones. This confirmed that autumn and spring glass eels present strong differences in their energetic status and that they have to be studied separately. We hypothesized that a potential threshold in energetic status may exist below which migration could be conditioned by energetics. Then, to unveil the underlying mechanisms of settlement processes in estuaries in relation to energy-based conditional strategy, we investigated the relationship between energetic status and migration behavior in both marine and estuarine glass eels. Estuarine individuals displayed lower weight than marine ones in autumn but not in spring supporting ... |
author2 |
Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Université de Pau et des Pays de l'Adour Valérie Bolliet |
format |
Doctoral or Postdoctoral Thesis |
author |
Liu, Hengtong |
author_facet |
Liu, Hengtong |
author_sort |
Liu, Hengtong |
title |
The relationship between migration behavior and energetic status in the European glass eel (Anguilla anguilla) |
title_short |
The relationship between migration behavior and energetic status in the European glass eel (Anguilla anguilla) |
title_full |
The relationship between migration behavior and energetic status in the European glass eel (Anguilla anguilla) |
title_fullStr |
The relationship between migration behavior and energetic status in the European glass eel (Anguilla anguilla) |
title_full_unstemmed |
The relationship between migration behavior and energetic status in the European glass eel (Anguilla anguilla) |
title_sort |
relationship between migration behavior and energetic status in the european glass eel (anguilla anguilla) |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://tel.archives-ouvertes.fr/tel-03411097 https://tel.archives-ouvertes.fr/tel-03411097/document https://tel.archives-ouvertes.fr/tel-03411097/file/thesishengtongliu.pdf |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_source |
https://tel.archives-ouvertes.fr/tel-03411097 Cellular Biology. Université de Pau et des Pays de l'Adour, 2020. English. ⟨NNT : 2020PAUU3014⟩ |
op_relation |
NNT: 2020PAUU3014 tel-03411097 https://tel.archives-ouvertes.fr/tel-03411097 https://tel.archives-ouvertes.fr/tel-03411097/document https://tel.archives-ouvertes.fr/tel-03411097/file/thesishengtongliu.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766395021755416576 |