General Information

Event name: FR-92-017
Country: FRANCE
Nature of the harmful event:
Mass mortalities
Event directly affected:
Toxicity detected: No
Associated syndrome: OTHER
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes
Event occurred before in this location: No
Individuals to contact: SCHWEIBOLD Laura

Location & Date

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Location: Latitude: , Longitude:
General location information: Bay of Quiberon and Vilaine Bay., SOUTHERN BRITTANY.
HAB Area code(s): FR-08
Additional location information: Area 4.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: June - August.


Causative organism known: Yes
Causative Species/Genus: Gymnodinium sp. (700,000 cells/L)
Gymnodinium cf. nagasakiense (cf. aureolum?)
Co-Ocurring Species/Genus: Gymnodinium sp. ( cells/L)
Chlorophyll concentration, if known: µg/l
Additional bloom information: Bloom of Gymnodinium "sp-1982" at the same time (green water).
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:
Growth Comments
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: Reinforced surveillance.
Additional harmful effect information: Some mortalities of clam larvae.
Updated at 12:37 on 2 Dec 2019