Factors influencing disease-induced mortality of Pacific oysters Crassostrea gigas
Mortalities of oyster Crassostrea gig-as seed associated with ostreid herpesvirus OsHV-1 mu Var have been observed in many oyster-producing countries since 2008. The present study, comprised of 4 complementary experiments, aimed to identify factors associated with disease-induced oyster mortality in...
Published in: | Aquaculture Environment Interactions |
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Format: | Article in Journal/Newspaper |
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Online Access: | https://doi.org/10.3354/aei00125 https://hal.archives-ouvertes.fr/hal-02559413 |
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fttriple:oai:gotriple.eu:10670/1.mkicwg 2023-05-15T15:58:58+02:00 Factors influencing disease-induced mortality of Pacific oysters Crassostrea gigas Petton, Bruno Boudry, Pierre Alunno-Bruscia, Marianne Pernet, Fabrice Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) 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)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS)-Université de Brest (UBO) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) Institut Français de Recherche pour l'Exploitation de la Mer - Brest (IFREMER Centre de Bretagne) ANR-12-AGRO-0001,GIGASSAT,Adaptation des écosystèmes ostréicoles au changement global(2012) 2015-01-01 https://doi.org/10.3354/aei00125 https://hal.archives-ouvertes.fr/hal-02559413 en eng HAL CCSD Inter-reseach science publisher hal-02559413 doi:10.3354/aei00125 10670/1.mkicwg https://hal.archives-ouvertes.fr/hal-02559413 undefined Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 1869-215X Aquaculture Environment Interactions Aquaculture Environment Interactions, Inter-reseach science publisher, 2015, 6 (3), pp.205-222. ⟨10.3354/aei00125⟩ ACL Epidemiology Risk analyses Shellfish farming Virus OsHV-1 mu Var envir demo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2015 fttriple https://doi.org/10.3354/aei00125 2023-01-22T18:31:27Z Mortalities of oyster Crassostrea gig-as seed associated with ostreid herpesvirus OsHV-1 mu Var have been observed in many oyster-producing countries since 2008. The present study, comprised of 4 complementary experiments, aimed to identify factors associated with disease-induced oyster mortality in order to propose mitigation strategies. Our first experiment compared survival of oysters from natural spatfall with others sampled from nurseries, after thermal elevation in the laboratory from <14 to 21 degrees C. A total of 60% of the tested wild seed batches (n = 51) were infected by OsHV-1, exhibited mortality and were able to transmit the disease to cohabited naive oysters. Comparatively, only 1 out of the 32 tested batches sampled from nurseries presented similar characteristics. In a second experiment, we studied the effects that timing and duration of exposure to field conditions had on risk of infection and mortality in the laboratory at 21 degrees C. Naive oysters deployed in the field during winter and spring, when seawater temperatures were <14.7 degrees C, showed no mortality in the laboratory, and OsHV-1 DNA was not detected by PCR. However, in oysters transferred to the field, OsHV-1 was observed when seawater temperature reached similar to 15.3 degrees C. Our third experiment showed that the odds of mortality decreased with age of oysters when facing the disease. Further, we observed that odds of disease mortality decreased with water renewal and increased with the biomass of neighbouring infected oysters under controlled conditions. Based on these findings, we propose mitigation strategies in terms of the regulation of oyster movements between sites, timing of seeding and spatial planning, taking into account seawater temperature and seed origin. Article in Journal/Newspaper Crassostrea gigas Unknown Pacific Aquaculture Environment Interactions 6 3 205 222 |
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Open Polar |
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Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
ACL Epidemiology Risk analyses Shellfish farming Virus OsHV-1 mu Var envir demo |
spellingShingle |
ACL Epidemiology Risk analyses Shellfish farming Virus OsHV-1 mu Var envir demo Petton, Bruno Boudry, Pierre Alunno-Bruscia, Marianne Pernet, Fabrice Factors influencing disease-induced mortality of Pacific oysters Crassostrea gigas |
topic_facet |
ACL Epidemiology Risk analyses Shellfish farming Virus OsHV-1 mu Var envir demo |
description |
Mortalities of oyster Crassostrea gig-as seed associated with ostreid herpesvirus OsHV-1 mu Var have been observed in many oyster-producing countries since 2008. The present study, comprised of 4 complementary experiments, aimed to identify factors associated with disease-induced oyster mortality in order to propose mitigation strategies. Our first experiment compared survival of oysters from natural spatfall with others sampled from nurseries, after thermal elevation in the laboratory from <14 to 21 degrees C. A total of 60% of the tested wild seed batches (n = 51) were infected by OsHV-1, exhibited mortality and were able to transmit the disease to cohabited naive oysters. Comparatively, only 1 out of the 32 tested batches sampled from nurseries presented similar characteristics. In a second experiment, we studied the effects that timing and duration of exposure to field conditions had on risk of infection and mortality in the laboratory at 21 degrees C. Naive oysters deployed in the field during winter and spring, when seawater temperatures were <14.7 degrees C, showed no mortality in the laboratory, and OsHV-1 DNA was not detected by PCR. However, in oysters transferred to the field, OsHV-1 was observed when seawater temperature reached similar to 15.3 degrees C. Our third experiment showed that the odds of mortality decreased with age of oysters when facing the disease. Further, we observed that odds of disease mortality decreased with water renewal and increased with the biomass of neighbouring infected oysters under controlled conditions. Based on these findings, we propose mitigation strategies in terms of the regulation of oyster movements between sites, timing of seeding and spatial planning, taking into account seawater temperature and seed origin. |
author2 |
Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) 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)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS)-Université de Brest (UBO) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) Institut Français de Recherche pour l'Exploitation de la Mer - Brest (IFREMER Centre de Bretagne) ANR-12-AGRO-0001,GIGASSAT,Adaptation des écosystèmes ostréicoles au changement global(2012) |
format |
Article in Journal/Newspaper |
author |
Petton, Bruno Boudry, Pierre Alunno-Bruscia, Marianne Pernet, Fabrice |
author_facet |
Petton, Bruno Boudry, Pierre Alunno-Bruscia, Marianne Pernet, Fabrice |
author_sort |
Petton, Bruno |
title |
Factors influencing disease-induced mortality of Pacific oysters Crassostrea gigas |
title_short |
Factors influencing disease-induced mortality of Pacific oysters Crassostrea gigas |
title_full |
Factors influencing disease-induced mortality of Pacific oysters Crassostrea gigas |
title_fullStr |
Factors influencing disease-induced mortality of Pacific oysters Crassostrea gigas |
title_full_unstemmed |
Factors influencing disease-induced mortality of Pacific oysters Crassostrea gigas |
title_sort |
factors influencing disease-induced mortality of pacific oysters crassostrea gigas |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://doi.org/10.3354/aei00125 https://hal.archives-ouvertes.fr/hal-02559413 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Crassostrea gigas |
genre_facet |
Crassostrea gigas |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 1869-215X Aquaculture Environment Interactions Aquaculture Environment Interactions, Inter-reseach science publisher, 2015, 6 (3), pp.205-222. ⟨10.3354/aei00125⟩ |
op_relation |
hal-02559413 doi:10.3354/aei00125 10670/1.mkicwg https://hal.archives-ouvertes.fr/hal-02559413 |
op_rights |
undefined |
op_doi |
https://doi.org/10.3354/aei00125 |
container_title |
Aquaculture Environment Interactions |
container_volume |
6 |
container_issue |
3 |
container_start_page |
205 |
op_container_end_page |
222 |
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