General Information

Event name: FR-92-005
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 (3,000,000 cells/L)1990 (2,500,000 cells L-).)
Individuals to contact: NEZAN, Elizabeth

Location & Date

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Location: Latitude: , Longitude:
General location information: Morlaix Bay., Northern Brittany.
HAB Area code(s): FR-05
Additional location information: Area 3.
Bloom event dates (yyyy/mm/dd): Start: 1992-06-24, End: 1992-07-27
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Gonyaulax spinifera (1,210,000 cells/L)
Alexandrium minutum (1,520,000 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: Presence of cysts in the sediment.
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): 1.25 - 3 Salinity: Current Velocity: 0
Nutrient information:
Temperature Range During Event: Max: 22 °C, Min: 18 °C
Salinity Range During Event: Max: 35, Min: 32
Bloom location in the water column:
In situ
Growth Comments In situ growth (presence of cysts in the sediment)
Additional Environmental information:

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: Ban of shellfish marketing from July 24 to July 31
Additional harmful effect information: Red water
Updated at 01:58 on 3 Dec 2019