General Information

Event name: NZ-02-002
Nature of the harmful event:
High Phyto concentration , Freshwater , Other ( )
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:
Individuals to contact: RHODES Lesley

Location & Date

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Location: Latitude: -37.976667, Longitude: 175.655556
General location information: Waikato River, North Island
HAB Area code(s): NZ-04
Additional location information:
Bloom event dates (yyyy/mm/dd): Start: 2002-12-15, End: 2003-03-15
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Summer 2002/2003


Causative organism known: Yes
Causative Species/Genus: Anabaena sp. (30 000 cells/L)
Microcystis sp. (30 000 cells/L)
Cylindrospermopsis sp. (30 000 cells/L)
Oscillatoria sp. (30 000 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: Kouzminov et al., 2007. Austr & NZ J Public Health. 31: 275-281

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
Kit used: Type of kit used:
Additional information:
Economic losses: NZ$ 195.000 Disruption of recreational use of water bodies. Less of confidence in the quality of water supplies.
Management decision: Water supply treatments
Additional harmful effect information:
Created at 11:32 on 11 Mar 2018
Updated at 11:02 on 13 Mar 2018