General Information

Event name: NZ-07-001
Nature of the harmful event:
Water Discoloration , High Phyto concentration , Mass mortalities
Event directly affected:
Natural Fish
Toxicity detected: No
Associated syndrome:
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: No
Event occurred before in this location: Yes (1993)
Individuals to contact: RHODES Lesley

Location & Date

[View larger map]
Location: Latitude: -35.169167, Longitude: 174.024167
General location information: Te Puna Inlet, North Island
HAB Area code(s): NZ-01
Additional location information:
Bloom event dates (yyyy/mm/dd): Start: 2007-04-17, End: 2007-04-30
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Karenia mikimotoi (1 000 000 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: Smith, K. F., Rhodes, L. L., Selwood, A. I., Marfell, M. J., Zeewoldt, C. M., de Salas, M. F., ... & Scholin, C. A. (2007). New Zealand. Massive Karenia mikimotoi bloom in Northland, New Zealand: Use of traditional and molecular techniques for rapid identification of HAB species. Harmful algae news, (34), 1-3.

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: High rainfall levels before the bloom

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: Affected fishing because of death of fish and eels
Management decision:
Additional harmful effect information: Death of fish and eels may be due to anoxia.
Created at 11:27 on 4 Mar 2018
Updated at 10:15 on 13 Mar 2018