General Information

Event name: NZ-94-004
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes
Associated syndrome: ASP
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (Marine Biotoxin Management Board)
Event occurred before in this location: No
Individuals to contact: RHODES Lesley

Location & Date

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Location: Latitude: -34.928056, Longitude: 173.442778
General location information: Doubtless Bay, North Island
HAB Area code(s): NZ-01
Additional location information:
Bloom event dates (yyyy/mm/dd): Start: 1994-09-01, End: 1994-11-30
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Pseudo-nitzschia australis Frenguelli 1939 (100 000 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: Rhodes et al., 1996. Harmful and Toxic Algal Blooms: 155-158

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
Pseudo-nitzschia australis Domoic Acid DA 600 ppm Immunoassay
Kit used: Type of kit used:
Additional information:
Economic losses: Closures to scallop harvesting have occurred every November and December in Northland since then.
Management decision:
Additional harmful effect information:
Created at 04:38 on 28 Mar 2018