General Information

Event name: NZ-04-001
Nature of the harmful event:
High Phyto concentration , Foam/Mucilage in the coast
Event directly affected:
Toxicity detected: No
Associated syndrome:
Unexplained toxicity: No
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: -45.958333, Longitude: 167.686667
General location information: Waiau River, South Island
HAB Area code(s): NZ-11
Additional location information:
Bloom event dates (yyyy/mm/dd): Event Date:2004-10-15
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: No
Causative Species/Genus:
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: Kilroy & Unwin, 2011. The arrival and spread of the bloom-forming, freshwater diatom, Didymosphenia geminata, in New Zealand. Aquatic invasions 6(3): 249-262.

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: Impacts on tourism as related to trout fishing.
Management decision: Quarantine of affected areas
Additional harmful effect information: Formation of very thick mucilage ("rock snot") Responsible of changes in river flows
Created at 10:16 on 10 Jan 2018
Updated at 02:23 on 13 Mar 2018