General Information

Event name: FR-90-012
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 (510,000,000 cells/L).)
Individuals to contact:

Location & Date

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Location: Latitude: , Longitude:
General location information: Audierne Bay, SOUTHERN BRITTANY
HAB Area code(s): FR-07
Additional location information: Area 4.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: February and November

Microalgae

Causative organism known: Yes
Causative Species/Genus: Chaetoceros armatum (x 1,000,00 cells/L)
November
Chaetoceros armatum (2,500,000 cells/L)
February
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:
Growth:
In situ
Growth Comments Probably
Additional Environmental information: Temperature: 10ºC (November) Salinity: 35.10(-3) (February) Turbidity: 40 N.T.U. (February)

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: Continued surveillance
Additional harmful effect information: Brownish water discoloration (a sheet of about 5000m(2) in February)
Updated at 12:12 on 3 Dec 2019
IOC/UNESCO ISSHA
IOC/UNESCO ICES PICES