General Information

Event name: AU-00-004
Nature of the harmful event:
High Phyto concentration , Mass mortalities
Event directly affected:
Aquaculture Fish
Toxicity detected: Yes
Associated syndrome:
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: -17.118056, Longitude: 146.909167
General location information: Mourilyan, Queensland
HAB Area code(s): AU-07
Additional location information:
Bloom event dates (yyyy/mm/dd): Event Date:2000-01-01
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: month and day of the event are unknown.


Causative organism known: Yes
Causative Species/Genus: Heterosigma sp. ( cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: Hallegraeff 2015 Aquaculturists' guide to harmful Australian marine microalgae

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
Heterosigma sp. Bioassay-Other
Kit used: No Type of kit used:
Additional information: ichthyotoxins
Economic losses: 1M AUD lost per prawn farm in several subsequent years
Management decision: Research into fish-kill mechanism
Additional harmful effect information:
Created at 06:00 on 14 Feb 2017
Updated at 06:02 on 14 Feb 2017