Summer mortality of Crassostrea gigas (Thunberg) in relation to environmental rearing conditions
International audience The purpose of this study is to investigate summer mortality of the cupped oyster, Crassostrea gigas, in relation to culture practices in the traditional oyster production region of Marennes-Oléron (France). Four oyster rearing conditions, varying culture location ("on-&q...
Main Authors: | , , |
---|---|
Other Authors: | , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2005
|
Subjects: | |
Online Access: | https://hal.science/hal-00616796 https://hal.science/hal-00616796/document https://hal.science/hal-00616796/file/Soletchnik_et_al_2005_J_Shellf_Res_24_197-207_auteurs.pdf |
id |
ftunivbrest:oai:HAL:hal-00616796v1 |
---|---|
record_format |
openpolar |
spelling |
ftunivbrest:oai:HAL:hal-00616796v1 2024-04-28T08:16:26+00:00 Summer mortality of Crassostrea gigas (Thunberg) in relation to environmental rearing conditions Soletchnik, Patrick Lambert, Christophe Costil, Katherine Laboratoire Environnement Ressources des Pertuis Charentais (LERPC) Unité Littoral (LITTORAL) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Université européenne de Bretagne - European University of Brittany (UEB) Physiologie et Ecophysiologie des Mollusques Marins (PE2M) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS) 2005 https://hal.science/hal-00616796 https://hal.science/hal-00616796/document https://hal.science/hal-00616796/file/Soletchnik_et_al_2005_J_Shellf_Res_24_197-207_auteurs.pdf en eng HAL CCSD National Shellfisheries Association hal-00616796 https://hal.science/hal-00616796 https://hal.science/hal-00616796/document https://hal.science/hal-00616796/file/Soletchnik_et_al_2005_J_Shellf_Res_24_197-207_auteurs.pdf info:eu-repo/semantics/OpenAccess ISSN: 0730-8000 Journal of Shellfish Research https://hal.science/hal-00616796 Journal of Shellfish Research, 2005, 24, pp.197-207 Crassostrea gigas Marennes-Oléron Bay marine ecosystem sediment hydrology summer mortality [SDV.BA]Life Sciences [q-bio]/Animal biology info:eu-repo/semantics/article Journal articles 2005 ftunivbrest 2024-04-10T23:44:46Z International audience The purpose of this study is to investigate summer mortality of the cupped oyster, Crassostrea gigas, in relation to culture practices in the traditional oyster production region of Marennes-Oléron (France). Four oyster rearing conditions, varying culture location ("on-" or "off-bottom"), and site depth (65% to 80% daily immersion termed "deep" or 45% to 65%, termed "shallow") were studied to compare biologic performance and maturation status of oysters, in relation to sediment and water column parameters. The most severe mortality occurred in June to July in "on-bottom" reared oysters (25%), as compared with 10% mortality in "off-bottom" cultured oysters. Oysters (shell and meat) grew significantly better when reared "off-bottom" than "on-bottom." Reproductive effort was almost double in "off-bottom" reared oysters, compared with those "on-bottom"; thus, reproduction cannot be directly related to mortality in this summer mortality event. Low glycogen content recorded for both "on" and "off-bottom" reared oysters in summer, confirmed the probable lack of food and/or the overstocking in the Marennes-Oléron Bay, but did not discriminated among culture conditions. Whatever the immersion depth ("deep" or "shallow" conditions), "on-bottom" cultured oysters were adversely affected in growth, reproductive effort, and survival suggesting a direct effect of the mud (the so called "mud effect") on the biologic performance of oysters cultured on the bottom. Data from monitoring of sediment redox potential, organic content, and ammonium release did not support hypotheses that these parameters were alone responsible for the observed differences in mortality events. Article in Journal/Newspaper Crassostrea gigas Université de Bretagne Occidentale: HAL |
institution |
Open Polar |
collection |
Université de Bretagne Occidentale: HAL |
op_collection_id |
ftunivbrest |
language |
English |
topic |
Crassostrea gigas Marennes-Oléron Bay marine ecosystem sediment hydrology summer mortality [SDV.BA]Life Sciences [q-bio]/Animal biology |
spellingShingle |
Crassostrea gigas Marennes-Oléron Bay marine ecosystem sediment hydrology summer mortality [SDV.BA]Life Sciences [q-bio]/Animal biology Soletchnik, Patrick Lambert, Christophe Costil, Katherine Summer mortality of Crassostrea gigas (Thunberg) in relation to environmental rearing conditions |
topic_facet |
Crassostrea gigas Marennes-Oléron Bay marine ecosystem sediment hydrology summer mortality [SDV.BA]Life Sciences [q-bio]/Animal biology |
description |
International audience The purpose of this study is to investigate summer mortality of the cupped oyster, Crassostrea gigas, in relation to culture practices in the traditional oyster production region of Marennes-Oléron (France). Four oyster rearing conditions, varying culture location ("on-" or "off-bottom"), and site depth (65% to 80% daily immersion termed "deep" or 45% to 65%, termed "shallow") were studied to compare biologic performance and maturation status of oysters, in relation to sediment and water column parameters. The most severe mortality occurred in June to July in "on-bottom" reared oysters (25%), as compared with 10% mortality in "off-bottom" cultured oysters. Oysters (shell and meat) grew significantly better when reared "off-bottom" than "on-bottom." Reproductive effort was almost double in "off-bottom" reared oysters, compared with those "on-bottom"; thus, reproduction cannot be directly related to mortality in this summer mortality event. Low glycogen content recorded for both "on" and "off-bottom" reared oysters in summer, confirmed the probable lack of food and/or the overstocking in the Marennes-Oléron Bay, but did not discriminated among culture conditions. Whatever the immersion depth ("deep" or "shallow" conditions), "on-bottom" cultured oysters were adversely affected in growth, reproductive effort, and survival suggesting a direct effect of the mud (the so called "mud effect") on the biologic performance of oysters cultured on the bottom. Data from monitoring of sediment redox potential, organic content, and ammonium release did not support hypotheses that these parameters were alone responsible for the observed differences in mortality events. |
author2 |
Laboratoire Environnement Ressources des Pertuis Charentais (LERPC) Unité Littoral (LITTORAL) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Université européenne de Bretagne - European University of Brittany (UEB) Physiologie et Ecophysiologie des Mollusques Marins (PE2M) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Soletchnik, Patrick Lambert, Christophe Costil, Katherine |
author_facet |
Soletchnik, Patrick Lambert, Christophe Costil, Katherine |
author_sort |
Soletchnik, Patrick |
title |
Summer mortality of Crassostrea gigas (Thunberg) in relation to environmental rearing conditions |
title_short |
Summer mortality of Crassostrea gigas (Thunberg) in relation to environmental rearing conditions |
title_full |
Summer mortality of Crassostrea gigas (Thunberg) in relation to environmental rearing conditions |
title_fullStr |
Summer mortality of Crassostrea gigas (Thunberg) in relation to environmental rearing conditions |
title_full_unstemmed |
Summer mortality of Crassostrea gigas (Thunberg) in relation to environmental rearing conditions |
title_sort |
summer mortality of crassostrea gigas (thunberg) in relation to environmental rearing conditions |
publisher |
HAL CCSD |
publishDate |
2005 |
url |
https://hal.science/hal-00616796 https://hal.science/hal-00616796/document https://hal.science/hal-00616796/file/Soletchnik_et_al_2005_J_Shellf_Res_24_197-207_auteurs.pdf |
genre |
Crassostrea gigas |
genre_facet |
Crassostrea gigas |
op_source |
ISSN: 0730-8000 Journal of Shellfish Research https://hal.science/hal-00616796 Journal of Shellfish Research, 2005, 24, pp.197-207 |
op_relation |
hal-00616796 https://hal.science/hal-00616796 https://hal.science/hal-00616796/document https://hal.science/hal-00616796/file/Soletchnik_et_al_2005_J_Shellf_Res_24_197-207_auteurs.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1797581565352476672 |