Parasites, pathological conditions and mortality in QX-resistant and wild-caught Sydney rock oysters, Saccostrea glomerata

Timothy J. Green; Brian J. Jones; Robert D. Adlard; Andrew C. Barnes

doi:10.1016/j.aquaculture.2008.04.004

Parasites, pathological conditions and mortality in QX-resistant and wild-caught Sydney rock oysters, Saccostrea glomerata

Timothy J. Green^*, Brian J. Jones, Robert D. Adlard, Andrew C. Barnes

^*Corresponding author for this work

Research output: Contribution to journal › Article

16 Citations (Scopus)

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
Pages (from-to)	35-38
Number of pages	4
Journal	Aquaculture
Volume	280
Issue number	1-4
DOIs	https://doi.org/10.1016/j.aquaculture.2008.04.004
Publication status	Published - 1 Aug 2008
Externally published	Yes

Keywords

Disease resistance
Marteilia sydneyi
Neoplasia
Saccostrea glomerata
Steinhausia sp.
Sydney rock oysters

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10.1016/j.aquaculture.2008.04.004

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title = "Parasites, pathological conditions and mortality in QX-resistant and wild-caught Sydney rock oysters, Saccostrea glomerata",

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.",

keywords = "Disease resistance, Marteilia sydneyi, Neoplasia, Saccostrea glomerata, Steinhausia sp., Sydney rock oysters",

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AU - Jones, Brian J.

AU - Adlard, Robert D.

AU - Barnes, Andrew C.

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N2 - 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.

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