Influence of low temperatures on the survival of the Pacific oyster (Crassostrea gigas) infected with Ostreid herpesvirus type 1
Mortalities of oyster seed of Crassostrea gigas associated with ostreid herpes virus OsHV-1 μVar have been observed in many oyster producing countries since 2008. The objective of this study was to further investigate whether low temperature treatments can offer a viable option to mitigate oyster mo...
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Online Access: | https://doi.org/10.1016/j.aquaculture.2015.04.010 https://archimer.ifremer.fr/doc/00259/37047/35555.pdf https://archimer.ifremer.fr/doc/00259/37047/ |
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fttriple:oai:gotriple.eu:10670/1.oj5gxd 2023-05-15T15:58:17+02:00 Influence of low temperatures on the survival of the Pacific oyster (Crassostrea gigas) infected with Ostreid herpesvirus type 1 Pernet, Fabrice Tamayo, David Petton, Bruno https://doi.org/10.1016/j.aquaculture.2015.04.010 https://archimer.ifremer.fr/doc/00259/37047/35555.pdf https://archimer.ifremer.fr/doc/00259/37047/ en eng Elsevier Science Bv doi:10.1016/j.aquaculture.2015.04.010 10670/1.oj5gxd https://archimer.ifremer.fr/doc/00259/37047/35555.pdf https://archimer.ifremer.fr/doc/00259/37047/ other Archimer, archive institutionnelle de l'Ifremer Aquaculture (0044-8486) (Elsevier Science Bv), 2015-08 , Vol. 445 , P. 57-62 envir demo Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ fttriple https://doi.org/10.1016/j.aquaculture.2015.04.010 2023-01-22T18:25:49Z Mortalities of oyster seed of Crassostrea gigas associated with ostreid herpes virus OsHV-1 μVar have been observed in many oyster producing countries since 2008. The objective of this study was to further investigate whether low temperature treatments can offer a viable option to mitigate oyster mortalities. An experiment was set-up to further evaluate the effect of low temperature treatments (10 and 13°C vs. 21°C) and their duration (6 d to 83 d) on the survival of oysters previously infected with OsHV-1 μVar by means of exposure to field conditions in areas where mortalities were occurring. Average survival of oysters infected with OsHV-1μVar was 71% after 83 d at low temperatures compared to only 23% in controls maintained at 21°C. During cold-exposure, levels of OsHV-1 DNA in oyster tissues gradually decreased, down to nearly the detection limit after 24 d. However, when cold-acclimated oysters were suddenly exposed at 21°C in the laboratory, they exhibited high levels of mortality along with an enhancement of OsHV-1 DNA concentration in their tissues. Therefore, OsHV-1 persists in oysters even at low temperature and is reactivated during subsequent thermal elevation to 21°C. Low temperature treatments did not improve overall survival of oyster seed infected with OsHV-1. These results suggest that moving infected oysters to a cooler area only delays mortality and may increase the risk of infection in neighbouring stocks when rising temperatures become permissive for viral replication. Text Crassostrea gigas Pacific oyster Unknown Pacific Aquaculture 445 57 62 |
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envir demo Pernet, Fabrice Tamayo, David Petton, Bruno Influence of low temperatures on the survival of the Pacific oyster (Crassostrea gigas) infected with Ostreid herpesvirus type 1 |
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description |
Mortalities of oyster seed of Crassostrea gigas associated with ostreid herpes virus OsHV-1 μVar have been observed in many oyster producing countries since 2008. The objective of this study was to further investigate whether low temperature treatments can offer a viable option to mitigate oyster mortalities. An experiment was set-up to further evaluate the effect of low temperature treatments (10 and 13°C vs. 21°C) and their duration (6 d to 83 d) on the survival of oysters previously infected with OsHV-1 μVar by means of exposure to field conditions in areas where mortalities were occurring. Average survival of oysters infected with OsHV-1μVar was 71% after 83 d at low temperatures compared to only 23% in controls maintained at 21°C. During cold-exposure, levels of OsHV-1 DNA in oyster tissues gradually decreased, down to nearly the detection limit after 24 d. However, when cold-acclimated oysters were suddenly exposed at 21°C in the laboratory, they exhibited high levels of mortality along with an enhancement of OsHV-1 DNA concentration in their tissues. Therefore, OsHV-1 persists in oysters even at low temperature and is reactivated during subsequent thermal elevation to 21°C. Low temperature treatments did not improve overall survival of oyster seed infected with OsHV-1. These results suggest that moving infected oysters to a cooler area only delays mortality and may increase the risk of infection in neighbouring stocks when rising temperatures become permissive for viral replication. |
format |
Text |
author |
Pernet, Fabrice Tamayo, David Petton, Bruno |
author_facet |
Pernet, Fabrice Tamayo, David Petton, Bruno |
author_sort |
Pernet, Fabrice |
title |
Influence of low temperatures on the survival of the Pacific oyster (Crassostrea gigas) infected with Ostreid herpesvirus type 1 |
title_short |
Influence of low temperatures on the survival of the Pacific oyster (Crassostrea gigas) infected with Ostreid herpesvirus type 1 |
title_full |
Influence of low temperatures on the survival of the Pacific oyster (Crassostrea gigas) infected with Ostreid herpesvirus type 1 |
title_fullStr |
Influence of low temperatures on the survival of the Pacific oyster (Crassostrea gigas) infected with Ostreid herpesvirus type 1 |
title_full_unstemmed |
Influence of low temperatures on the survival of the Pacific oyster (Crassostrea gigas) infected with Ostreid herpesvirus type 1 |
title_sort |
influence of low temperatures on the survival of the pacific oyster (crassostrea gigas) infected with ostreid herpesvirus type 1 |
publisher |
Elsevier Science Bv |
url |
https://doi.org/10.1016/j.aquaculture.2015.04.010 https://archimer.ifremer.fr/doc/00259/37047/35555.pdf https://archimer.ifremer.fr/doc/00259/37047/ |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Crassostrea gigas Pacific oyster |
genre_facet |
Crassostrea gigas Pacific oyster |
op_source |
Archimer, archive institutionnelle de l'Ifremer Aquaculture (0044-8486) (Elsevier Science Bv), 2015-08 , Vol. 445 , P. 57-62 |
op_relation |
doi:10.1016/j.aquaculture.2015.04.010 10670/1.oj5gxd https://archimer.ifremer.fr/doc/00259/37047/35555.pdf https://archimer.ifremer.fr/doc/00259/37047/ |
op_rights |
other |
op_doi |
https://doi.org/10.1016/j.aquaculture.2015.04.010 |
container_title |
Aquaculture |
container_volume |
445 |
container_start_page |
57 |
op_container_end_page |
62 |
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1766394005587755008 |