Scottish oyster mortality event and association with Vibrio aestuarianus
Pacific oysters, Crassostrea (Magallana) gigas, are the most commonly cultured invertebrate species globally. Recent years have seen outbreaks of summer mortality across the globe, mainly caused by viral and bacterial pathogens such as OsHV-1 µvar and Vibrio spp. Despite isolated outbreaks in southe...
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| Language: | English |
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Elsevier
2024-12-01
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| Series: | Aquaculture Reports |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352513424005684 |
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| author | Tim P. Bean Hannah Farley Jennifer Nascimento-Schulze Tim Regan |
| author_facet | Tim P. Bean Hannah Farley Jennifer Nascimento-Schulze Tim Regan |
| author_sort | Tim P. Bean |
| collection | DOAJ |
| description | Pacific oysters, Crassostrea (Magallana) gigas, are the most commonly cultured invertebrate species globally. Recent years have seen outbreaks of summer mortality across the globe, mainly caused by viral and bacterial pathogens such as OsHV-1 µvar and Vibrio spp. Despite isolated outbreaks in southern England, the UK has remained largely free from these pathogens. A summer mortality event in Scotland was investigated after Vibrio spp. were implicated. We identified two key Vibrio species (V. aestuarianus and V. splendidus) but complete absence of OsHV-1. There was a high prevalence of V. aestuarianus among moribund and dead oysters, along with an increase in V. aestuarianus detected in the water column and sediment. In accordance with strains associated with oyster mortalities elsewhere in Scotland and mainland Europe, V. aestuarianus from this site belongs to Lineage A. Whilst V. splendidus, could be cultured from most infected tissue samples, V. aestuarianus could not be cultured from from frozen tissue , only from unfrozen infected tissue. In vivo infection experiments with V. aestuarianus resulted in significantly higher mortalities than with V. splendidus and were exacerbated by increased temperature. These findings suggest that mortalities are caused by V. aestuarianus, which may have been intensified by handling stress and rising temperatures. |
| format | Article |
| id | doaj-art-a5f741d166344286acbb77a462bca5ba |
| institution | Kabale University |
| issn | 2352-5134 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Aquaculture Reports |
| spelling | doaj-art-a5f741d166344286acbb77a462bca5ba2024-12-03T04:29:25ZengElsevierAquaculture Reports2352-51342024-12-0139102480Scottish oyster mortality event and association with Vibrio aestuarianusTim P. Bean0Hannah Farley1Jennifer Nascimento-Schulze2Tim Regan3Corresponding author.; The Roslin Institute and Royal (Dick) School of Veterinary Studies, Easter Bush Campus, The University of Edinburgh, Midlothian EH25 9RG, UKThe Roslin Institute and Royal (Dick) School of Veterinary Studies, Easter Bush Campus, The University of Edinburgh, Midlothian EH25 9RG, UKThe Roslin Institute and Royal (Dick) School of Veterinary Studies, Easter Bush Campus, The University of Edinburgh, Midlothian EH25 9RG, UKThe Roslin Institute and Royal (Dick) School of Veterinary Studies, Easter Bush Campus, The University of Edinburgh, Midlothian EH25 9RG, UKPacific oysters, Crassostrea (Magallana) gigas, are the most commonly cultured invertebrate species globally. Recent years have seen outbreaks of summer mortality across the globe, mainly caused by viral and bacterial pathogens such as OsHV-1 µvar and Vibrio spp. Despite isolated outbreaks in southern England, the UK has remained largely free from these pathogens. A summer mortality event in Scotland was investigated after Vibrio spp. were implicated. We identified two key Vibrio species (V. aestuarianus and V. splendidus) but complete absence of OsHV-1. There was a high prevalence of V. aestuarianus among moribund and dead oysters, along with an increase in V. aestuarianus detected in the water column and sediment. In accordance with strains associated with oyster mortalities elsewhere in Scotland and mainland Europe, V. aestuarianus from this site belongs to Lineage A. Whilst V. splendidus, could be cultured from most infected tissue samples, V. aestuarianus could not be cultured from from frozen tissue , only from unfrozen infected tissue. In vivo infection experiments with V. aestuarianus resulted in significantly higher mortalities than with V. splendidus and were exacerbated by increased temperature. These findings suggest that mortalities are caused by V. aestuarianus, which may have been intensified by handling stress and rising temperatures.http://www.sciencedirect.com/science/article/pii/S2352513424005684VibrioPacific oysterMortalityScotlandAquacultureGenome |
| spellingShingle | Tim P. Bean Hannah Farley Jennifer Nascimento-Schulze Tim Regan Scottish oyster mortality event and association with Vibrio aestuarianus Aquaculture Reports Vibrio Pacific oyster Mortality Scotland Aquaculture Genome |
| title | Scottish oyster mortality event and association with Vibrio aestuarianus |
| title_full | Scottish oyster mortality event and association with Vibrio aestuarianus |
| title_fullStr | Scottish oyster mortality event and association with Vibrio aestuarianus |
| title_full_unstemmed | Scottish oyster mortality event and association with Vibrio aestuarianus |
| title_short | Scottish oyster mortality event and association with Vibrio aestuarianus |
| title_sort | scottish oyster mortality event and association with vibrio aestuarianus |
| topic | Vibrio Pacific oyster Mortality Scotland Aquaculture Genome |
| url | http://www.sciencedirect.com/science/article/pii/S2352513424005684 |
| work_keys_str_mv | AT timpbean scottishoystermortalityeventandassociationwithvibrioaestuarianus AT hannahfarley scottishoystermortalityeventandassociationwithvibrioaestuarianus AT jennifernascimentoschulze scottishoystermortalityeventandassociationwithvibrioaestuarianus AT timregan scottishoystermortalityeventandassociationwithvibrioaestuarianus |