Abstract
Differences in the survival of QX-resistant fifth generation (QXR5) and wild-caught (Wild-Caught) Sydney rock oysters were assessed over the QX-disease risk period in the Pimpama River, SE Queensland. Cumulative mortality of Wild-Caught oysters (31.7%) was significantly greater than QXR5 oysters (0.0%) over the 118 days of the experiment. PCR and histological results showed that Wild-Caught oyster did not die from QX disease. Histology revealed oysters were infected with disseminating hemocytic neoplasia, a Steinhausia-like infection, a Rickettsia-like organism infecting epithelial cells of the gill, digenean flukes encysted in the gonadal tissue and a gill response to an unknown toxin. The cause of mortality is attributed to disseminating hemocytic neoplasia.
Original language | English |
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Pages (from-to) | 35-38 |
Number of pages | 4 |
Journal | Aquaculture |
Volume | 280 |
Issue number | 1-4 |
DOIs | |
Publication status | Published - 1 Aug 2008 |
Externally published | Yes |
Keywords
- Disease resistance
- Marteilia sydneyi
- Neoplasia
- Saccostrea glomerata
- Steinhausia sp.
- Sydney rock oysters