General Information

Event name: NL-02-001
Nature of the harmful event:
Water Discoloration
Event directly affected:
Toxicity detected: No
Associated syndrome:
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: No
Event occurred before in this location: Yes (Regular appearance.)
Individuals to contact: PEPERZAK, Louis

Location & Date

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Location: Latitude: , Longitude:
General location information: South to North, Dutch Coastal Zone
HAB Area code(s): NL-02
Additional location information: Hundred m2 to 10 20 Km2. ICES fishing area: IV c.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: April-July 2002 Total of 9 observations from airplanes and ships of purple, red and orange 'spots' and blooms; only 2 samples were taken and counted in chich Noctiluca could be confirmed


Causative organism known: Yes
Causative Species/Genus: Noctiluca sp. (9,000 cells/L)
900 c/L in a second sample
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: No Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity: 0
Nutrient information:
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column:
In situ
Growth Comments
Additional Environmental information: Clorophyll concentration not known

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:
Updated at 04:08 on 28 Feb 2018