General Information

Event name: NZ-96-001
Nature of the harmful event:
High Phyto concentration , Seafood toxins , Mass mortalities
Event directly affected:
Natural Fish , Shellfish
Toxicity detected: Yes
Associated syndrome: OTHER
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (Biotoxin monitoring program)
Event occurred before in this location: Yes (1994)
Individuals to contact: RHODES Lesley

Location & Date

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Location: Latitude: -46.589167, Longitude: 168.062778
General location information: Foveaux Strait, South Island
HAB Area code(s): NZ-11
Additional location information:
Bloom event dates (yyyy/mm/dd): Start: 1996-01-07, End: 1996-02-20
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Gymnodinium sp. (500 000 cells/L)
Karenia mikimotoi, Karenia brevis, Karenia selliformis
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: Mackenzie, L. (1996). A Gymnodinium spp. Bloom in Foveaux Strait, January 1996 Haywood, A. J., Steidinger, K. A., Truby, E. W., Bergquist, P. R., Bergquist, P. L., Adamson, J., & Mackenzie, L. (2004). Comparative morphology and molecular phylogenetic analysis of three new species of the genus Karenia (Dinophyceae) from New Zealand. Journal of Phycology, 40(1), 165-179.

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
Foveaux oysters CYCLIC IMINES - Gymnodimines 416 MU/100g Bioassay-Mouse
Kit used: Type of kit used:
Additional information:
Economic losses:
Management decision:
Additional harmful effect information: Mass stranding of surf clams. Fish kill
Created at 04:34 on 21 Feb 2018
Updated at 03:23 on 4 May 2018