Effect of water temperature on mortality of Pacific oysters Crassostrea gigas associated with microvariant ostreid herpesvirus 1 (OsHV-1 µVar)
The ostreid herpesvirus 1 microvariant (OsHV-1 µVar) causes mass mortality of Pacific oysters Crassostrea gigas. Water temperature can directly influence the incidence of disease or correlate with seasonal changes in the environment and oyster physiology that modify the susceptibility of the oysters...
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ftdoajarticles:oai:doaj.org/article:114bce6322ec4f378ba0243307d645cb 2023-05-15T15:58:21+02:00 Effect of water temperature on mortality of Pacific oysters Crassostrea gigas associated with microvariant ostreid herpesvirus 1 (OsHV-1 µVar) M de Kantzow P Hick JA Becker RJ Whittington 2016-08-01T00:00:00Z https://doi.org/10.3354/aei00186 https://doaj.org/article/114bce6322ec4f378ba0243307d645cb EN eng Inter-Research https://www.int-res.com/abstracts/aei/v8/p419-428/ https://doaj.org/toc/1869-215X https://doaj.org/toc/1869-7534 1869-215X 1869-7534 doi:10.3354/aei00186 https://doaj.org/article/114bce6322ec4f378ba0243307d645cb Aquaculture Environment Interactions, Vol 8, Pp 419-428 (2016) Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 article 2016 ftdoajarticles https://doi.org/10.3354/aei00186 2022-12-31T15:24:00Z The ostreid herpesvirus 1 microvariant (OsHV-1 µVar) causes mass mortality of Pacific oysters Crassostrea gigas. Water temperature can directly influence the incidence of disease or correlate with seasonal changes in the environment and oyster physiology that modify the susceptibility of the oysters to disease. The effect of water temperature was evaluated in controlled laboratory conditions by intramuscular injection of OsHV-1 µVar after acclimation of 8 mo old spat and 17 mo old adult oysters at 4 different temperatures (14, 18, 22 and 26°C). Mortality was 84 and 77% at 26 and 22°C, respectively, compared to 23% at 18°C and nil at 14°C. There was a statistically significant interaction between the dose of OsHV-1 µVar and water temperature. At 18°C, mortality occurred exclusively at a dose of 106 OsHV-1 µVar genome copies per oyster whereas at the higher temperatures, oysters challenged with 103 copies per oyster also died. Mortality did not occur at 14°C and OsHV-1 µVar was detected in tissues of only 1% of the oysters after 14 d. When accounting for temperature and dose, spat (8 mo) were 2.7 times more likely to die than adults (17 mo). Our study confirms a direct effect of water temperature on infection and disease caused by OsHV-1 µVar. We identified a threshold water temperature of between 14 and 18°C below which productive infection does not occur and the requirement for a higher dose of OsHV-1 µVar to initiate infection at 18°C than at 22°C. These results have implications for predicting and managing disease outbreaks caused by OsHV-1 µVar. Article in Journal/Newspaper Crassostrea gigas Directory of Open Access Journals: DOAJ Articles Pacific Aquaculture Environment Interactions 8 419 428 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 |
spellingShingle |
Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 M de Kantzow P Hick JA Becker RJ Whittington Effect of water temperature on mortality of Pacific oysters Crassostrea gigas associated with microvariant ostreid herpesvirus 1 (OsHV-1 µVar) |
topic_facet |
Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 |
description |
The ostreid herpesvirus 1 microvariant (OsHV-1 µVar) causes mass mortality of Pacific oysters Crassostrea gigas. Water temperature can directly influence the incidence of disease or correlate with seasonal changes in the environment and oyster physiology that modify the susceptibility of the oysters to disease. The effect of water temperature was evaluated in controlled laboratory conditions by intramuscular injection of OsHV-1 µVar after acclimation of 8 mo old spat and 17 mo old adult oysters at 4 different temperatures (14, 18, 22 and 26°C). Mortality was 84 and 77% at 26 and 22°C, respectively, compared to 23% at 18°C and nil at 14°C. There was a statistically significant interaction between the dose of OsHV-1 µVar and water temperature. At 18°C, mortality occurred exclusively at a dose of 106 OsHV-1 µVar genome copies per oyster whereas at the higher temperatures, oysters challenged with 103 copies per oyster also died. Mortality did not occur at 14°C and OsHV-1 µVar was detected in tissues of only 1% of the oysters after 14 d. When accounting for temperature and dose, spat (8 mo) were 2.7 times more likely to die than adults (17 mo). Our study confirms a direct effect of water temperature on infection and disease caused by OsHV-1 µVar. We identified a threshold water temperature of between 14 and 18°C below which productive infection does not occur and the requirement for a higher dose of OsHV-1 µVar to initiate infection at 18°C than at 22°C. These results have implications for predicting and managing disease outbreaks caused by OsHV-1 µVar. |
format |
Article in Journal/Newspaper |
author |
M de Kantzow P Hick JA Becker RJ Whittington |
author_facet |
M de Kantzow P Hick JA Becker RJ Whittington |
author_sort |
M de Kantzow |
title |
Effect of water temperature on mortality of Pacific oysters Crassostrea gigas associated with microvariant ostreid herpesvirus 1 (OsHV-1 µVar) |
title_short |
Effect of water temperature on mortality of Pacific oysters Crassostrea gigas associated with microvariant ostreid herpesvirus 1 (OsHV-1 µVar) |
title_full |
Effect of water temperature on mortality of Pacific oysters Crassostrea gigas associated with microvariant ostreid herpesvirus 1 (OsHV-1 µVar) |
title_fullStr |
Effect of water temperature on mortality of Pacific oysters Crassostrea gigas associated with microvariant ostreid herpesvirus 1 (OsHV-1 µVar) |
title_full_unstemmed |
Effect of water temperature on mortality of Pacific oysters Crassostrea gigas associated with microvariant ostreid herpesvirus 1 (OsHV-1 µVar) |
title_sort |
effect of water temperature on mortality of pacific oysters crassostrea gigas associated with microvariant ostreid herpesvirus 1 (oshv-1 µvar) |
publisher |
Inter-Research |
publishDate |
2016 |
url |
https://doi.org/10.3354/aei00186 https://doaj.org/article/114bce6322ec4f378ba0243307d645cb |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Crassostrea gigas |
genre_facet |
Crassostrea gigas |
op_source |
Aquaculture Environment Interactions, Vol 8, Pp 419-428 (2016) |
op_relation |
https://www.int-res.com/abstracts/aei/v8/p419-428/ https://doaj.org/toc/1869-215X https://doaj.org/toc/1869-7534 1869-215X 1869-7534 doi:10.3354/aei00186 https://doaj.org/article/114bce6322ec4f378ba0243307d645cb |
op_doi |
https://doi.org/10.3354/aei00186 |
container_title |
Aquaculture Environment Interactions |
container_volume |
8 |
container_start_page |
419 |
op_container_end_page |
428 |
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1766394082113880064 |