General Information

Event name: AU-91-002
Nature of the harmful event:
Water Discoloration , High Phyto concentration , Freshwater , Other ( Contaminated drinking water supplies)
Event directly affected:
Other Terrestrial , Humans
Toxicity detected: Yes
Associated syndrome: Cyanobacterial toxins effects
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: No
Event occurred before in this location: No
Individuals to contact: Hallegraeff Gustaaf

Location & Date

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Location: Latitude: -33.798611, Longitude: 142.118333
General location information: Darling River, NSW, South Australia
HAB Area code(s): AU-16
Additional location information: 1200 kilometers of river affected
Bloom event dates (yyyy/mm/dd): Start: 1991-11-01, End: 1991-12-30
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Anabaena circinalis Rabenhorst 1863 ( cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: Humpage et al., 1994. Aust. J. Mar. Freshw. Res. 45: 761-771.

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity:
Nutrient information:
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column:
Growth Comments
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Anabaena circinalis Saxitoxins STX eq Bioassay-Mouse
Kit used: No Type of kit used:
Additional information:
Economic losses: yes but unknown
Management decision: Australian army was called in for emergency drinking water supplies
Additional harmful effect information: 10,000 live stock killed
Created at 06:07 on 31 Jan 2017
Updated at 07:47 on 10 Feb 2017