General Information

Event name: NZ-94-002
Nature of the harmful event:
High Phyto concentration , Seafood toxins
Event directly affected:
Toxicity detected: Yes
Associated syndrome: DSP
Unexplained toxicity:
Species implicated in toxin transmission (transvector): Mussels and cockles
Report the outcome of a monitoring programme: Yes (New Zealand Marine Biotoxin Management Board)
Event occurred before in this location: No
Individuals to contact: RHODES Lesley

Location & Date

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Location: Latitude: -41.081389, Longitude: 174.333056
General location information: Queen Charlotte Sound, South Island
HAB Area code(s): NZ-08
Additional location information:
Bloom event dates (yyyy/mm/dd): Start: 1994-09-15,
Quarantine levels dates (yyyy/mm/dd): First detection: 1994-11-15, End: 1995-10-15
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Dinophysis acuta (138 000 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: Mackenzie, L. (1995). DSP and NSP in New Zealand: some recent findings. Proceedings at the Marine biotoxin workshop N4

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
Shellfish Okadaic Acid ELISA
Kit used: Type of kit used:
Additional information: +mouse tests + HPLC
Economic losses:
Management decision: Closure of area during 11 months to date
Additional harmful effect information: On the march 1995, 4 adults reported getting sick from eating mussels and cockles within the closed area. Symptoms = diarrhoea and/or vomiting -> typical of DPS poisoning
Created at 04:16 on 21 Feb 2018
Updated at 03:19 on 4 May 2018