General Information

Event name: NZ-05-002
Nature of the harmful event:
High Phyto concentration , Freshwater , Other ( Cyanobacterial toxin)
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:
Individuals to contact: RHODES Lesley

Location & Date

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Location: Latitude: -41.171667, Longitude: 174.986667
General location information: Hutt River, North Island
HAB Area code(s): NZ-06
Additional location information:
Bloom event dates (yyyy/mm/dd): Event Date:2005-11-15
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: November 2005


Causative organism known: Yes
Causative Species/Genus: Phormidium sp. ( cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: The causative organism was most similar to Phormidium autumnale
Event-related bibliography: Wood et al., 2007. Toxicon 50: 292-301

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: Unusually low and stable flow

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Phormidium sp. Anatoxins Anatoxin-A LC-MS
Kit used: Type of kit used:
Additional information:
Economic losses:
Management decision: Access restrictions were placed on over 60% of river catchments in the western Wellington region, severely affecting recreational users.
Additional harmful effect information: 5 dogs died
Created at 05:05 on 9 Mar 2018
Updated at 03:41 on 13 Apr 2018