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 journalArticle

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 languageEnglish
Pages (from-to)35-38
Number of pages4
JournalAquaculture
Volume280
Issue number1-4
DOIs
Publication statusPublished - 1 Aug 2008
Externally publishedYes

Keywords

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

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