Do otoliths record physiological stresses of restocked young eels?
International audience Restocking measures of the endangered European eel (Anguilla anguilla) have been set up in Europe since 2011. Restocking operations are performed with glass eel postlarval stage during their upstream migration. Restocking protocols involve the collection of glass eel in estuar...
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ftccsdartic:oai:HAL:hal-02610185v1 2023-05-15T13:27:56+02:00 Do otoliths record physiological stresses of restocked young eels? Les otolithes enregistrent-ils les stress physiologiques des jeunes anguilles repeuplées ? Koffi-About, S Gaillard, M Rigaud, Christian Daverat, Françoise Ecosystèmes aquatiques et changements globaux (UR EABX) Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) Palma de Majorque, France 2019-05-21 https://hal.inrae.fr/hal-02610185 en eng HAL CCSD hal-02610185 https://hal.inrae.fr/hal-02610185 IRSTEA: PUB00064229 43ème Larval Fish Early Life History. American Fisheries Society https://hal.inrae.fr/hal-02610185 43ème Larval Fish Early Life History. American Fisheries Society, May 2019, Palma de Majorque, France [SDE]Environmental Sciences info:eu-repo/semantics/conferenceObject Conference papers 2019 ftccsdartic 2021-09-11T23:44:32Z International audience Restocking measures of the endangered European eel (Anguilla anguilla) have been set up in Europe since 2011. Restocking operations are performed with glass eel postlarval stage during their upstream migration. Restocking protocols involve the collection of glass eel in estuaries, transport and marking of 30% of the glass eels with Alizarin red S before restocking. All these restocking operations such as transport, handling, osmotic and thermal shock are a potential source of physiological stress for glass eels. The objective of the present study was to investigate the inter-individual responses to stress in the structure of the otoliths of restocked fish. This was achieved using otolith and experimental science. The originality of the present study was to address restocking stress for early stages of European eels. An experimental setting was performed by rearing glass eels obtained from a restocking program during 9 months. A control group was obtained by collecting wild glass eels at the entrance of a freshwater habitat. Relying on microstructure analysis of the sagittae otoliths and biometric measures, we aimed at investigating inter-individual variabilities of glass eels during their larval and glass eel stage and verifying the presence of additional stress marks related to restocking. The present results would be useful for improving eel restocking protocols or interrogating the relevance of restocking eels programs as a measure of recovery of healthy eel populations Conference Object Anguilla anguilla Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDE]Environmental Sciences |
spellingShingle |
[SDE]Environmental Sciences Koffi-About, S Gaillard, M Rigaud, Christian Daverat, Françoise Do otoliths record physiological stresses of restocked young eels? |
topic_facet |
[SDE]Environmental Sciences |
description |
International audience Restocking measures of the endangered European eel (Anguilla anguilla) have been set up in Europe since 2011. Restocking operations are performed with glass eel postlarval stage during their upstream migration. Restocking protocols involve the collection of glass eel in estuaries, transport and marking of 30% of the glass eels with Alizarin red S before restocking. All these restocking operations such as transport, handling, osmotic and thermal shock are a potential source of physiological stress for glass eels. The objective of the present study was to investigate the inter-individual responses to stress in the structure of the otoliths of restocked fish. This was achieved using otolith and experimental science. The originality of the present study was to address restocking stress for early stages of European eels. An experimental setting was performed by rearing glass eels obtained from a restocking program during 9 months. A control group was obtained by collecting wild glass eels at the entrance of a freshwater habitat. Relying on microstructure analysis of the sagittae otoliths and biometric measures, we aimed at investigating inter-individual variabilities of glass eels during their larval and glass eel stage and verifying the presence of additional stress marks related to restocking. The present results would be useful for improving eel restocking protocols or interrogating the relevance of restocking eels programs as a measure of recovery of healthy eel populations |
author2 |
Ecosystèmes aquatiques et changements globaux (UR EABX) Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) |
format |
Conference Object |
author |
Koffi-About, S Gaillard, M Rigaud, Christian Daverat, Françoise |
author_facet |
Koffi-About, S Gaillard, M Rigaud, Christian Daverat, Françoise |
author_sort |
Koffi-About, S |
title |
Do otoliths record physiological stresses of restocked young eels? |
title_short |
Do otoliths record physiological stresses of restocked young eels? |
title_full |
Do otoliths record physiological stresses of restocked young eels? |
title_fullStr |
Do otoliths record physiological stresses of restocked young eels? |
title_full_unstemmed |
Do otoliths record physiological stresses of restocked young eels? |
title_sort |
do otoliths record physiological stresses of restocked young eels? |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.inrae.fr/hal-02610185 |
op_coverage |
Palma de Majorque, France |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_source |
43ème Larval Fish Early Life History. American Fisheries Society https://hal.inrae.fr/hal-02610185 43ème Larval Fish Early Life History. American Fisheries Society, May 2019, Palma de Majorque, France |
op_relation |
hal-02610185 https://hal.inrae.fr/hal-02610185 IRSTEA: PUB00064229 |
_version_ |
1766401237180219392 |