General Information

Event name: NZ-00-001
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes
Associated syndrome: PSP
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (Monitoring programme by the Ministry of Health)
Event occurred before in this location: No
Individuals to contact: RHODES Lesley

Location & Date

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Location: Latitude: -35.566667, Longitude: 173.316667
General location information: Northland, North Island
HAB Area code(s): NZ-01
Additional location information: Widespread contamination of shellfish around much of the North Island
Bloom event dates (yyyy/mm/dd): Start: 2000-05-15, End: 2001-02-01
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Gymnodinium catenatum ( cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: MacKenzie, L. and T. Beauchamp 2001: Gymnodinium catenatum in New Zealand: a new problem for public health and the shellfish industry. Cawthron Report # 633 10pp.

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:
Management decision: Extensive area of the North Island coast were closed to recreational harvesting on several occasions during 2000-2004
Additional harmful effect information: This event was the most extensive, and one of the most economically harmful, toxic algae blooms to be documented in New Zealand to date.
Created at 04:09 on 2 Mar 2018
Updated at 03:28 on 16 May 2018