General Information

Event name: FR-90-004
Country: FRANCE
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: Yes
Event occurred before in this location: Yes (1989 (130,000,000 cells/L))
Individuals to contact: ETOURNEAU, Claude

Location & Date

Location: Latitude: , Longitude:
General location information: Calvados coast, near Orne estuary, Normandy.
HAB Area code(s):
Additional location information: Area 2.
Bloom event dates (yyyy/mm/dd): Start: 1990-08-22, End: 1990-09-05
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Gymnodinium sp. (500,000,00 cells/L)
August 23
Gymnodinium sp. (230,000,00 cells/L)
August 28
Gymnodinium sp. (50,000,000 cells/L)
August 30
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: 22 °C, Min: 19 °C
Salinity Range During Event:
Bloom location in the water column:
Growth Comments No available data
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: No Type of kit used:
Additional information:
Economic losses:
Management decision: Continued surveillance
Additional harmful effect information: Green water discoloration - offshore extent: about 3 kms.