General Information

Event name: NZ-11-001
Nature of the harmful event:
Seafood toxins
Event directly affected:
Shellfish , Humans
Toxicity detected: Yes
Associated syndrome: PSP
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (NZ biotoxin monitoring program)
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: 2011-03-07, End: 2011-04-20
Quarantine levels dates (yyyy/mm/dd): End: 2011-06-01
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Alexandrium catenella (Whedon et Kofoid) Balech 1985 (4 000 000 cells/L)
Real name: Alexandrium pacificum
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: MacKenzie, 2014. NZ Journal of Marine and Freshwater Research 3(48): 430-465.

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
Greenshell mussel Saxitoxins STX eq 41.5 mg/kg LC-MS
Kit used: No Type of kit used:
Additional information:
Economic losses:
Management decision: Shellfish farm closure, max closure period of 97 days
Additional harmful effect information:
Created at 09:59 on 10 Jan 2018
Updated at 03:34 on 4 May 2018