Swimming activity and behaviour of european Anguilla anguilla glass eels in response to photoperiod and flow reversal and the role of energy status
To better understand migratory divergences among Anguilla anguilla glass eels, the behaviour of individuals caught at the time of their estuary entrance was studied through their response to a light:dark cycle and then to both water current reversal and light: dark cycle. In a first experiment, fish...
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ftcemoa:oai:irsteadoc.irstea.fr:PUB00028257 2023-05-15T13:26:46+02:00 Swimming activity and behaviour of european Anguilla anguilla glass eels in response to photoperiod and flow reversal and the role of energy status Bureau Du Colombier, S. Bolliet, V. Bardonnet, A. CEMAGREF BORDEAUX UR EPBX FRA INRA SAINT PEE FRA 2009 application/pdf https://irsteadoc.irstea.fr/cemoa/PUB00028257 Anglais eng https://irsteadoc.irstea.fr/cemoa/PUB00028257 Date de dépôt: 2010-02-08 - Tous les documents et informations contenus dans la base CemOA Publications sont protégés en vertu du droit de propriété intellectuelle, en particulier par le droit d'auteur. La personne consultant la base CemOA Publications peut visualiser, reproduire, ou stocker des copies des publications, à condition que l'information soit seulement pour son usage personnel et non commercial. L'utilisation des travaux universitaires est soumise à autorisation préalable de leurs auteurs. Toute information relative au signalement d'une publication contenue dans CemOA Publications doit inclure la citation bibliographique usuelle : Nom du ou des auteurs, titre et source du document, date et URL de la notice (dc_identifier). 23527 ANGUILLA ANGUILLA ESTUAIRE PHYSIOLOGIE MIGRATION ESTUARIES PHYSIOLOGY Article de revue scientifique à comité de lecture 2009 ftcemoa 2021-06-29T09:25:20Z To better understand migratory divergences among Anguilla anguilla glass eels, the behaviour of individuals caught at the time of their estuary entrance was studied through their response to a light:dark cycle and then to both water current reversal and light: dark cycle. In a first experiment, fish moving with the flow in response to dusk (M+ fish) and fish that had not exhibited any movement (Mâˆ' fish) were distinguished. Anguilla anguilla from these two groups were then individually marked and their response to water current reversal compared. M+ individuals mainly exhibited negative rheotaxis with a tidal periodicity, whereas positive rheotaxis was mainly exhibited by Mâˆ' individuals. Thus, M+ A. anguilla glass eels showing negative rheotaxis appear to have the strongest propensity to migrate, the converse applies to Mâˆ' ones showing positive rheotaxis. A small percentage of individuals (5%) were hyperactive, alternately swimming with and against the current with almost no resting phase. These fish lost c. 2 mg wet mass dayâˆ'1, whereas individuals which were almost inactive lost c. 1 mgdayâˆ'1. Wet and dry mass changes in relation to activity levels were compared with previous experiments and it was concluded that A. anguilla glass eel energy status might be involved in differences in migratory tendencies but other factors that might be important are discussed. It is proposed that any decrease in A. anguilla glass eel energy stores associated with global warming might lead to an increase in the proportion of sedentary individuals and thus be involved in the decrease in the recruitment to freshwater habitats. Article in Journal/Newspaper Anguilla anguilla Irstea Publications et Bases documentaires (Irstea@doc/CemOA) |
institution |
Open Polar |
collection |
Irstea Publications et Bases documentaires (Irstea@doc/CemOA) |
op_collection_id |
ftcemoa |
language |
English |
topic |
ANGUILLA ANGUILLA ESTUAIRE PHYSIOLOGIE MIGRATION ESTUARIES PHYSIOLOGY |
spellingShingle |
ANGUILLA ANGUILLA ESTUAIRE PHYSIOLOGIE MIGRATION ESTUARIES PHYSIOLOGY Bureau Du Colombier, S. Bolliet, V. Bardonnet, A. Swimming activity and behaviour of european Anguilla anguilla glass eels in response to photoperiod and flow reversal and the role of energy status |
topic_facet |
ANGUILLA ANGUILLA ESTUAIRE PHYSIOLOGIE MIGRATION ESTUARIES PHYSIOLOGY |
description |
To better understand migratory divergences among Anguilla anguilla glass eels, the behaviour of individuals caught at the time of their estuary entrance was studied through their response to a light:dark cycle and then to both water current reversal and light: dark cycle. In a first experiment, fish moving with the flow in response to dusk (M+ fish) and fish that had not exhibited any movement (Mâˆ' fish) were distinguished. Anguilla anguilla from these two groups were then individually marked and their response to water current reversal compared. M+ individuals mainly exhibited negative rheotaxis with a tidal periodicity, whereas positive rheotaxis was mainly exhibited by Mâˆ' individuals. Thus, M+ A. anguilla glass eels showing negative rheotaxis appear to have the strongest propensity to migrate, the converse applies to Mâˆ' ones showing positive rheotaxis. A small percentage of individuals (5%) were hyperactive, alternately swimming with and against the current with almost no resting phase. These fish lost c. 2 mg wet mass dayâˆ'1, whereas individuals which were almost inactive lost c. 1 mgdayâˆ'1. Wet and dry mass changes in relation to activity levels were compared with previous experiments and it was concluded that A. anguilla glass eel energy status might be involved in differences in migratory tendencies but other factors that might be important are discussed. It is proposed that any decrease in A. anguilla glass eel energy stores associated with global warming might lead to an increase in the proportion of sedentary individuals and thus be involved in the decrease in the recruitment to freshwater habitats. |
author2 |
CEMAGREF BORDEAUX UR EPBX FRA INRA SAINT PEE FRA |
format |
Article in Journal/Newspaper |
author |
Bureau Du Colombier, S. Bolliet, V. Bardonnet, A. |
author_facet |
Bureau Du Colombier, S. Bolliet, V. Bardonnet, A. |
author_sort |
Bureau Du Colombier, S. |
title |
Swimming activity and behaviour of european Anguilla anguilla glass eels in response to photoperiod and flow reversal and the role of energy status |
title_short |
Swimming activity and behaviour of european Anguilla anguilla glass eels in response to photoperiod and flow reversal and the role of energy status |
title_full |
Swimming activity and behaviour of european Anguilla anguilla glass eels in response to photoperiod and flow reversal and the role of energy status |
title_fullStr |
Swimming activity and behaviour of european Anguilla anguilla glass eels in response to photoperiod and flow reversal and the role of energy status |
title_full_unstemmed |
Swimming activity and behaviour of european Anguilla anguilla glass eels in response to photoperiod and flow reversal and the role of energy status |
title_sort |
swimming activity and behaviour of european anguilla anguilla glass eels in response to photoperiod and flow reversal and the role of energy status |
publishDate |
2009 |
url |
https://irsteadoc.irstea.fr/cemoa/PUB00028257 |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_source |
23527 |
op_relation |
https://irsteadoc.irstea.fr/cemoa/PUB00028257 |
op_rights |
Date de dépôt: 2010-02-08 - Tous les documents et informations contenus dans la base CemOA Publications sont protégés en vertu du droit de propriété intellectuelle, en particulier par le droit d'auteur. La personne consultant la base CemOA Publications peut visualiser, reproduire, ou stocker des copies des publications, à condition que l'information soit seulement pour son usage personnel et non commercial. L'utilisation des travaux universitaires est soumise à autorisation préalable de leurs auteurs. Toute information relative au signalement d'une publication contenue dans CemOA Publications doit inclure la citation bibliographique usuelle : Nom du ou des auteurs, titre et source du document, date et URL de la notice (dc_identifier). |
_version_ |
1766394346664361984 |