General Information

Event name: FR-97-002
Country: FRANCE
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes
Associated syndrome: PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes
Event occurred before in this location: Yes
Individuals to contact: SCHWEIBOLD Laura

Location & Date

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Location: Latitude: , Longitude:
General location information: , Northern Brittany. AND ATLANTIC COAST
HAB Area code(s): FR-06
Additional location information: Morlaix Bay (Northern Brittany) is affected every year by blooms of this species. What is new is that Alexandrium minutum may be observed now in other areas of Northern Brittany, in rather important concentrations (x100,000 cells/L), but without PSP toxicity until now. The presence of Alexandrium minutum was also observed along the Atlantic coast, between the rivers Loire and Gironde. These concentrations are the most important ever observed in this region. No PSP toxicity was detected in shellfish. All these events show that Alexandrium minutum is becoming the main problem of the French phytoplankton Monitoring.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Alexandrium minutum (10 - 20,00 cells/L)
between river Loire and Gironde in the Atlantic
Alexandrium minutum (100,000 cells/L)
Morlaix Bay
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: The results of two campaigns, the first one a few years ago, and the second one last year, show that Alexandrium minutum cysts can be observed now in the sediment of these new areas. So it is obvious that there is a slowly extension of Alexandrium minutum
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:
Additional harmful effect information: PSP detected in Morlaix Bay. However no toxicity was detected in Norther Brittany and Atlantic coast.
Updated at 12:45 on 2 Dec 2019