Harmful Algal Information System: Event NZ-04-002

General Information

Event name:	NZ-04-002
Country:	NEW ZEALAND
Nature of the harmful event:	High Phyto concentration , Mass mortalities
Event directly affected:	Shellfish
Toxicity detected:	No
Associated syndrome:
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme:	Yes (National Marine Biotoxin Monitoring Program)
Event occurred before in this location:
Individuals to contact:	RHODES Lesley

Location & Date

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Location:	Latitude: -36.290556, Longitude: 174.802778
General location information:	Leigh, North Island HAB Area code(s): NZ-02
Additional location information:
Bloom event dates (yyyy/mm/dd):	Event Date:2004-02-18
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:

Microalgae

Causative organism known:	Yes
Causative Species/Genus:	Ostreopsis siamensis Schmidt 1901 ( cells/L) 1406 * 10^-3 g/FW
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known:	µg/l
Additional bloom information:
Event-related bibliography:	Shears, N. T., & Ross, P. M. (2009). Blooms of benthic dinoflagellates of the genus Ostreopsis; an increasing and ecologically important phenomenon on temperate reefs in New Zealand and worldwide. Harmful algae, 8(6), 916-925.

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:

Growth Comments

Additional Environmental information:

occurred following a period of calm sea conditions with warmer than averagewater temperatures.

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:

Management decision:

Additional harmful effect information:

Urchins densities declined by 56%-60% at blooms sites over the study period, urchins are extremely important as herbivores and as a resource, threat to coastal food webs and fisheries.

Created at 11:40 on 7 Mar 2018
Updated at 01:14 on 12 Apr 2018