General Information

Event name: NL-11-001
Nature of the harmful event:
High Phyto concentration
Event directly affected:
Toxicity detected: Yes (Approximate range: Below Report Limit)
Associated syndrome: DSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (National Shellfish Monitoring)
Event occurred before in this location: Yes
Individuals to contact: POELMAN, Marnix

Location & Date

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Location: Latitude: 51.755556, Longitude: 3.902778
General location information: Lake Grevelingen,
HAB Area code(s): NL-03
Additional location information:
Bloom event dates (yyyy/mm/dd): Event Date:2011-05-17
Start: 2011-05-17, End: 2011-05-30
Quarantine levels dates (yyyy/mm/dd): First detection: 2011-05-17, End: 2011-05-30
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Dinophysis acuminata (290 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography:

Environmental Conditions

Weather: Cloudy Turbidity (NTU): Wind direction: SW
Stratified water: Yes Oxygen content (nL/L): Wind velocity: 3
Temperature (°C): 11 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: Whole column
In situ
Growth Comments Lowest numbers at the bottom
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Oysters Okadaic Acid OA Below Report Limit LC-MS
Kit used: Type of kit used:
Additional information: Only toxins found at trace levels.
Economic losses: Administrative restrictions.
Management decision:
Additional harmful effect information:
Created at 12:39 on 25 Mar 2015
Updated at 01:59 on 22 Feb 2018