| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
Influence of low temperatures on the survival of the Pacific oyster (Crassostrea gigas) infected with Ostreid herpesvirus type 1
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| Autores: |
Pernet, Fabrice
Tamayo, David
Petton, Bruno
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| Data: |
2015-08
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| Ano: |
2015
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| Palavras-chave: |
Bivalve
Disease
OsHV-1
Oyster
Temperature
Virus
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| Resumo: |
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.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
https://archimer.ifremer.fr/doc/00259/37047/35555.pdf
DOI:10.1016/j.aquaculture.2015.04.010
https://archimer.ifremer.fr/doc/00259/37047/
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| Editor: |
Elsevier Science Bv
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| Formato: |
application/pdf
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| Fonte: |
Aquaculture (0044-8486) (Elsevier Science Bv), 2015-08 , Vol. 445 , P. 57-62
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| Direitos: |
2015 Elsevier B.V. All rights reserved.
info:eu-repo/semantics/openAccess
restricted use
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