Harmful Algal Information System: Event FR-93-006

General Information

Event name:	FR-93-006
Country:	FRANCE
Nature of the harmful event:	Water Discoloration , Seafood toxins
Event directly affected:
Toxicity detected:	Yes (Approximate range: 474 ľg STXeq / 100 g)
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 (1989, 1990, 1992 in Morlaix Bay.)
Individuals to contact:

Location:	Latitude: , Longitude:
General location information:	Penzé River (site 033)., Northern Brittany. HAB Area code(s): FR-05
Additional location information:	Area 3.
Bloom event dates (yyyy/mm/dd):	Start: 1993-06-21, End: 1993-07-12
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:

Causative organism known:	Yes
Causative Species/Genus:	Alexandrium minutum (5,012,000 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known:	µg/l
Additional bloom information:	Presence of cysts in the sediment.
Event-related bibliography:

Nutrient information:

Temperature Range During Event:

Max: 20 °C, Min: 16 °C

Salinity Range During Event:

Max: 35, Min: 23

Bloom location in the water column:

Growth:

In situ

Growth Comments

In situ growth (presence of cysts in the sediment).

Additional Environmental information:

Species containing the toxin	Toxin type	Toxin details	Max. concentration	Assay type
Oysters flesh	Saxitoxins	STX eq	up to 474	Bioassay-Mouse
Mussels flesh	Saxitoxins	STX eq	up to 112	Bioassay-Mouse

Kit used: No

Type of kit used:

Additional information:

PSP toxicity level above safety level.

Economic losses:

Management decision:

Ban of shellfish marketing from June 24 to July 28

Additional harmful effect information:

Pink to reddish colored water. PSP toxicity level above safety level.