General Information

Event name: AU-92-001
Nature of the harmful event:
Water Discoloration , High Phyto concentration , Freshwater
Event directly affected:
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: Yes (1986)
Individuals to contact: Hallegraeff Gustaaf

Location & Date

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Location: Latitude: -42.791111, Longitude: 147.541667
General location information: Orielton Lagoon, Tasmania
HAB Area code(s): AU-21
Additional location information:
Bloom event dates (yyyy/mm/dd): Start: 1992-12-01, End: 1993-03-01
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: No
Causative Species/Genus: Nodularia spumigena ( cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: Jones G.J. et al., 1994. Australian Journal of Marine and Freshwater Research 45: 787-878

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
Nodularia spumigena Nodularins Nodularin 3500 g/g dry weight LC-FD
Kit used: No Type of kit used:
Additional information:
Economic losses:
Management decision: Coastal engineering to create culvert under causeway at a cost of 1.5M AUD
Additional harmful effect information: Public warning signs erected.
Created at 04:36 on 7 Feb 2017
Updated at 07:45 on 10 Feb 2017