Ecology of the reproduction of the Pacific oyster in Mediterranean lagoon
The Mediterranean lagoons host many anthropogenic uses including shellfish aquaculture since the beginning of the 20th century. Imported in 1970, the cupped oyster, Crassostrea gigas, has adapted perfectly and has allowed an important development of oyster’s industry until 2008, the year of occurren...
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fttriple:oai:gotriple.eu:10670/1.vioq8a 2023-05-15T15:58:02+02:00 Ecology of the reproduction of the Pacific oyster in Mediterranean lagoon Écologie de la reproduction de l'huître Crassostrea gigas en lagune méditerranéenne Lagarde, Franck Sorbonne université Lett, Christophe Pouvreau, Stéphane 2018-11-29 http://www.theses.fr/2018SORUS470/document fr fre 10670/1.vioq8a http://www.theses.fr/2018SORUS470/document other Theses.fr Huître Écologie larvaire Ressource trophique Connectivité Recrutement Lagune côtière Oyster Larval ecology Trophic resource Connectivity Recruitment Coastal lagoon envir archi Thesis https://vocabularies.coar-repositories.org/resource_types/c_46ec/ 2018 fttriple 2023-01-22T16:38:28Z The Mediterranean lagoons host many anthropogenic uses including shellfish aquaculture since the beginning of the 20th century. Imported in 1970, the cupped oyster, Crassostrea gigas, has adapted perfectly and has allowed an important development of oyster’s industry until 2008, the year of occurrence of spat outbreak related to the emergence of an Ostreid Herpes-virus µvar. The scarcity of spat and the speculation on this product changed regionally cultural practices and the supply of juveniles, with in particular the wish of developing a local activity of spat collection. However the cycle of reproduction of the species and the recruitment of juveniles were poorly known in lagoon environments. In this context, the objective of this thesis is to characterize the variability of the reproduction and the recruitment of the cupped oyster in Mediterranean lagoon. The lagoon configuration offers the advantages of productivity for the broodstock and hydrodynamic connectivity for the larvae. However, it appears that the ecological functioning of the system at the base of the primary production plays an essential role on the trophic resources for the success of oyster reproduction. This work takes place in the context of the ecological restoration under oligotrophication, which first effects we describe on the oyster's reproductive cycle. Les lagunes méditerranéennes hébergent de nombreux usages anthropiques dont la conchyliculture depuis le début du 20ème siècle. Importée en 1970, l’huître creuse, Crassostrea gigas, s’y est adaptée parfaitement et a permis un développement ostréicole important jusqu’en 2008, année d’apparition des surmortalités de naissain liées à l’émergence d’un variant du virus OsHv1. La raréfaction du naissain et la spéculation sur ce produit ont modifié régionalement les pratiques culturales et les modes d’approvisionnement en juvéniles, avec notamment la volonté de développer une activité locale de captage. Mais le cycle de reproduction de l’espèce et le recrutement de juvéniles étaient mal ... Thesis Crassostrea gigas Pacific oyster Unknown Pacific |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
French |
topic |
Huître Écologie larvaire Ressource trophique Connectivité Recrutement Lagune côtière Oyster Larval ecology Trophic resource Connectivity Recruitment Coastal lagoon envir archi |
spellingShingle |
Huître Écologie larvaire Ressource trophique Connectivité Recrutement Lagune côtière Oyster Larval ecology Trophic resource Connectivity Recruitment Coastal lagoon envir archi Lagarde, Franck Ecology of the reproduction of the Pacific oyster in Mediterranean lagoon |
topic_facet |
Huître Écologie larvaire Ressource trophique Connectivité Recrutement Lagune côtière Oyster Larval ecology Trophic resource Connectivity Recruitment Coastal lagoon envir archi |
description |
The Mediterranean lagoons host many anthropogenic uses including shellfish aquaculture since the beginning of the 20th century. Imported in 1970, the cupped oyster, Crassostrea gigas, has adapted perfectly and has allowed an important development of oyster’s industry until 2008, the year of occurrence of spat outbreak related to the emergence of an Ostreid Herpes-virus µvar. The scarcity of spat and the speculation on this product changed regionally cultural practices and the supply of juveniles, with in particular the wish of developing a local activity of spat collection. However the cycle of reproduction of the species and the recruitment of juveniles were poorly known in lagoon environments. In this context, the objective of this thesis is to characterize the variability of the reproduction and the recruitment of the cupped oyster in Mediterranean lagoon. The lagoon configuration offers the advantages of productivity for the broodstock and hydrodynamic connectivity for the larvae. However, it appears that the ecological functioning of the system at the base of the primary production plays an essential role on the trophic resources for the success of oyster reproduction. This work takes place in the context of the ecological restoration under oligotrophication, which first effects we describe on the oyster's reproductive cycle. Les lagunes méditerranéennes hébergent de nombreux usages anthropiques dont la conchyliculture depuis le début du 20ème siècle. Importée en 1970, l’huître creuse, Crassostrea gigas, s’y est adaptée parfaitement et a permis un développement ostréicole important jusqu’en 2008, année d’apparition des surmortalités de naissain liées à l’émergence d’un variant du virus OsHv1. La raréfaction du naissain et la spéculation sur ce produit ont modifié régionalement les pratiques culturales et les modes d’approvisionnement en juvéniles, avec notamment la volonté de développer une activité locale de captage. Mais le cycle de reproduction de l’espèce et le recrutement de juvéniles étaient mal ... |
author2 |
Sorbonne université Lett, Christophe Pouvreau, Stéphane |
format |
Thesis |
author |
Lagarde, Franck |
author_facet |
Lagarde, Franck |
author_sort |
Lagarde, Franck |
title |
Ecology of the reproduction of the Pacific oyster in Mediterranean lagoon |
title_short |
Ecology of the reproduction of the Pacific oyster in Mediterranean lagoon |
title_full |
Ecology of the reproduction of the Pacific oyster in Mediterranean lagoon |
title_fullStr |
Ecology of the reproduction of the Pacific oyster in Mediterranean lagoon |
title_full_unstemmed |
Ecology of the reproduction of the Pacific oyster in Mediterranean lagoon |
title_sort |
ecology of the reproduction of the pacific oyster in mediterranean lagoon |
publishDate |
2018 |
url |
http://www.theses.fr/2018SORUS470/document |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Crassostrea gigas Pacific oyster |
genre_facet |
Crassostrea gigas Pacific oyster |
op_source |
Theses.fr |
op_relation |
10670/1.vioq8a http://www.theses.fr/2018SORUS470/document |
op_rights |
other |
_version_ |
1766393762765864960 |