Brief description
Farmed pearl oysters (Pinctada maxima) suffered high mortality in the Dampier Archipelago of Western Australia in 1996. The mortality event affected all oyster sizes and coincided with extensive blooms of the cyanobacterium Trichodesmium erythraeum. The potent neurotoxin saxitoxin was detected in small amounts in some of the affected adult oysters but was not detectable in T. erythraeum. Vibrio species were isolated from some of the affected oysters but not in patterns consistent with a primary disease and no virus-like particles were observed. Juvenile oysters were exposed to medium and high concentrations of T. erythraeum in experimental aquaria for 7 days. No mortality of juvenile oysters occurred but individuals exposed to T. erythraeum at 105 cells/ml were less healthy than those fed upon the diatom Chaetoceros calcitrans. Histopathology of adult oysters from the affected farm and juvenile oysters exposed to T. erythraeum in the aquarium experiments were similar and included dilation of digestive gland lumens, sloughing of epithelial cells and granulocytes under the epithelial layer. These symptoms suggest that the T. erythraeum blooms in the archipelago were not a suitable food source for the oysters and may have contributed to the observed mortalities.Lineage
Maintenance and Update Frequency: unknown
Statement: Original record compiled for the Western Australian Marine Science Institution (WAMSI), Project 3.8, 2008. Originally sourced from WA DEC Marine Policy and Planning Branch Pilbara and Lower West Kimberley Environmental Report Library. Date range generated from citation date, limited abstract information available.
Notes
CreditA. P. Negri
Credit
O. Bunter
O. Bunter
Credit
B. Jones
B. Jones
Credit
L. Llewellyn
L. Llewellyn
Credit
Australian Institute of Marine Science (AIMS)
Australian Institute of Marine Science (AIMS)
Modified: 06 2008
Data time period: 2004 to 2004
text: westlimit=116.06; southlimit=-20.77; eastlimit=117.32; northlimit=-20.24
Subjects
AGRICULTURAL AQUATIC SCIENCES |
AGRICULTURE |
Aquaculture |
Algal bloom |
Biosphere | Vegetation | Algae |
EARTH SCIENCE |
Fauna |
Flora |
Marine Features (Australia) | Dampier Archipelago, WA |
Mortality |
Pearl Farm |
Toxin |
biota |
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Other Information
Identifiers
- global : 516811d7-cd5d-207a-e0440003ba8c79dd