Journal
AQUACULTURE
Volume 280, Issue 1-4, Pages 35-38Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aquaculture.2008.04.004
Keywords
Sydney rock oysters; Saccostrea glomerata; neoplasia; Steinhausia sp.; Marteilia sydneyi; disease resistance
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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. (C) 2008 Elsevier B.V. All rights reserved.
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