Alexandrium catenella increases the susceptibility of Crassostrea gigas to pathogenic vibrios: possible implications in oyster mass mortalities in the Mediterranean Thau lagoon
National audience Since several years an alarming worldwide expansion of Harmful Algae Bloom (HAB) was observed in coastal and / or confined waters. Alexandrium catenella, a paralytic shellfish poisoning (PSP) producer, is now regularly found in Thau lagoon (south of France) at concentrations up to...
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ftunivperpignan:oai:HAL:hal-01259581v1 2024-04-28T08:16:43+00:00 Alexandrium catenella increases the susceptibility of Crassostrea gigas to pathogenic vibrios: possible implications in oyster mass mortalities in the Mediterranean Thau lagoon Abi-Khalil, Célina Lopez-Joven, Carmen Abadie, E. Savar, V. Amzil, Z. Laabir, M. Rolland, Jean-Luc Interactions Hôtes-Pathogènes-Environnements (IHPE) Université de Perpignan Via Domitia (UPVD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM) MARine Biodiversity Exploitation and Conservation (UMR MARBEC) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS) Laboratoire Phycotoxines (PHYC) Unité Dynamiques des Écosystèmes Côtiers (DYNECO) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) CNRS, IFREMER, ANSES, IUEM Brest, France 2015-03-31 https://sde.hal.science/hal-01259581 en eng HAL CCSD hal-01259581 https://sde.hal.science/hal-01259581 Conférence Nationale Phycotox et GIS Cyano. Diversité, écologie et fonctionnement des microalgues toxiques et cyanobactéries: de leurs toxines et interactions avec les autres organismes aux risques écosystémiques et socio-économiques associés https://sde.hal.science/hal-01259581 Conférence Nationale Phycotox et GIS Cyano. Diversité, écologie et fonctionnement des microalgues toxiques et cyanobactéries: de leurs toxines et interactions avec les autres organismes aux risques écosystémiques et socio-économiques associés, CNRS, IFREMER, ANSES, IUEM, Mar 2015, Brest, France http://phycotox2015.sciencesconf.org/ [SDE]Environmental Sciences info:eu-repo/semantics/conferenceObject Conference papers 2015 ftunivperpignan 2024-04-04T16:59:01Z National audience Since several years an alarming worldwide expansion of Harmful Algae Bloom (HAB) was observed in coastal and / or confined waters. Alexandrium catenella, a paralytic shellfish poisoning (PSP) producer, is now regularly found in Thau lagoon (south of France) at concentrations up to 15x106 cellules. l-1. In the same periods, events of oyster’s mortality are also observed causing huge economic losses. The purpose of this study is to investigate the relationship between these toxic events and mortality phenomenon. For that, we conducted a field work to evaluate the presence of the toxic A. catenella in Thau lagoon during the years 2013 and 2014 in which high mortality of oysters spats were observed in spring. At the same time, we experimentally infected spats with the pathogenic bacterium V. tasmaniensis LGP32 and kept them unfed or previously fed either with the toxic alga A. catenella or with nontoxic algae, Alexandrium tamarense or Tisochrysis lutea. Results showed that the toxic alga was present in the lagoon when spats' mortalities occurred suggesting A. catenella could be involved in these events. Moreover, our laboratory experiment showed that the exposure to A. catenella increases the susceptibility of spats to one of its pathogens, V. tasmaniensis LGP32. Those results both together suggest for the first time that, in the environment, toxic algae could be implicated in oysters’ mortality. Further studies should be conducted to determine the main factors of this alga implicated in weakening oysters and their immune system against their pathogen which lead to these large scale mortalities Conference Object Crassostrea gigas Université de Perpignan: HAL |
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Open Polar |
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Université de Perpignan: HAL |
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ftunivperpignan |
language |
English |
topic |
[SDE]Environmental Sciences |
spellingShingle |
[SDE]Environmental Sciences Abi-Khalil, Célina Lopez-Joven, Carmen Abadie, E. Savar, V. Amzil, Z. Laabir, M. Rolland, Jean-Luc Alexandrium catenella increases the susceptibility of Crassostrea gigas to pathogenic vibrios: possible implications in oyster mass mortalities in the Mediterranean Thau lagoon |
topic_facet |
[SDE]Environmental Sciences |
description |
National audience Since several years an alarming worldwide expansion of Harmful Algae Bloom (HAB) was observed in coastal and / or confined waters. Alexandrium catenella, a paralytic shellfish poisoning (PSP) producer, is now regularly found in Thau lagoon (south of France) at concentrations up to 15x106 cellules. l-1. In the same periods, events of oyster’s mortality are also observed causing huge economic losses. The purpose of this study is to investigate the relationship between these toxic events and mortality phenomenon. For that, we conducted a field work to evaluate the presence of the toxic A. catenella in Thau lagoon during the years 2013 and 2014 in which high mortality of oysters spats were observed in spring. At the same time, we experimentally infected spats with the pathogenic bacterium V. tasmaniensis LGP32 and kept them unfed or previously fed either with the toxic alga A. catenella or with nontoxic algae, Alexandrium tamarense or Tisochrysis lutea. Results showed that the toxic alga was present in the lagoon when spats' mortalities occurred suggesting A. catenella could be involved in these events. Moreover, our laboratory experiment showed that the exposure to A. catenella increases the susceptibility of spats to one of its pathogens, V. tasmaniensis LGP32. Those results both together suggest for the first time that, in the environment, toxic algae could be implicated in oysters’ mortality. Further studies should be conducted to determine the main factors of this alga implicated in weakening oysters and their immune system against their pathogen which lead to these large scale mortalities |
author2 |
Interactions Hôtes-Pathogènes-Environnements (IHPE) Université de Perpignan Via Domitia (UPVD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM) MARine Biodiversity Exploitation and Conservation (UMR MARBEC) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS) Laboratoire Phycotoxines (PHYC) Unité Dynamiques des Écosystèmes Côtiers (DYNECO) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) CNRS, IFREMER, ANSES, IUEM |
format |
Conference Object |
author |
Abi-Khalil, Célina Lopez-Joven, Carmen Abadie, E. Savar, V. Amzil, Z. Laabir, M. Rolland, Jean-Luc |
author_facet |
Abi-Khalil, Célina Lopez-Joven, Carmen Abadie, E. Savar, V. Amzil, Z. Laabir, M. Rolland, Jean-Luc |
author_sort |
Abi-Khalil, Célina |
title |
Alexandrium catenella increases the susceptibility of Crassostrea gigas to pathogenic vibrios: possible implications in oyster mass mortalities in the Mediterranean Thau lagoon |
title_short |
Alexandrium catenella increases the susceptibility of Crassostrea gigas to pathogenic vibrios: possible implications in oyster mass mortalities in the Mediterranean Thau lagoon |
title_full |
Alexandrium catenella increases the susceptibility of Crassostrea gigas to pathogenic vibrios: possible implications in oyster mass mortalities in the Mediterranean Thau lagoon |
title_fullStr |
Alexandrium catenella increases the susceptibility of Crassostrea gigas to pathogenic vibrios: possible implications in oyster mass mortalities in the Mediterranean Thau lagoon |
title_full_unstemmed |
Alexandrium catenella increases the susceptibility of Crassostrea gigas to pathogenic vibrios: possible implications in oyster mass mortalities in the Mediterranean Thau lagoon |
title_sort |
alexandrium catenella increases the susceptibility of crassostrea gigas to pathogenic vibrios: possible implications in oyster mass mortalities in the mediterranean thau lagoon |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://sde.hal.science/hal-01259581 |
op_coverage |
Brest, France |
genre |
Crassostrea gigas |
genre_facet |
Crassostrea gigas |
op_source |
Conférence Nationale Phycotox et GIS Cyano. Diversité, écologie et fonctionnement des microalgues toxiques et cyanobactéries: de leurs toxines et interactions avec les autres organismes aux risques écosystémiques et socio-économiques associés https://sde.hal.science/hal-01259581 Conférence Nationale Phycotox et GIS Cyano. Diversité, écologie et fonctionnement des microalgues toxiques et cyanobactéries: de leurs toxines et interactions avec les autres organismes aux risques écosystémiques et socio-économiques associés, CNRS, IFREMER, ANSES, IUEM, Mar 2015, Brest, France http://phycotox2015.sciencesconf.org/ |
op_relation |
hal-01259581 https://sde.hal.science/hal-01259581 |
_version_ |
1797581722808745984 |