Harmful Algal Information System: Event FR-93-020

General Information

Event name:	FR-93-020
Country:	FRANCE
Nature of the harmful event:	Seafood toxins
Event directly affected:
Toxicity detected:	Yes
Associated syndrome:
Unexplained toxicity:	Yes
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme:	Yes
Event occurred before in this location:	No
Individuals to contact:	GUILLOU, Jean-Louis

Location & Date

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Location:	Latitude: , Longitude:
General location information:	Salses-Leucate Lake (site 083)., Western Mediterranean Sea. HAB Area code(s): FR-12
Additional location information:	Area 7.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:	May to July.

Microalgae

Causative organism known:	Yes
Causative Species/Genus:	Prorocentrum minimum ( cells/L) small concentrations. Alexandrium minutum ( cells/L) small concentrations Dinophysis spp. ( cells/L) small concentrations
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:

Growth Comments

Additional Environmental information:

Toxin Assay Information

Species containing the toxin	Toxin type	Toxin details	Max. concentration	Assay type
Mussel (digestive gland)	Okadaic Acid		Very rapid mortaliti	Bioassay-Mouse
Mussel	Okadaic Acid		Absence	LC
Mussel	Saxitoxins	STX	Small quantities	LC

Kit used:

Type of kit used:

Additional information:

Very rapid mortalities of mice with acetone extract of mussel digestive gland. The HPLC analysis showed the absence of DSP toxins, and the presence of very small quantities of PSP toxins, not sufficient to explain the mortality of mice.

Economic losses:

Management decision:

Ban of shellfish marketing, from

Additional harmful effect information:

Updated at 02:17 on 3 Dec 2019