Harmful Algal Information System: Event ES-02-008

General Information

Event name:	ES-02-008
Country:	SPAIN
Nature of the harmful event:	Seafood toxins
Event directly affected:
Toxicity detected:	Yes (Approximate range: 1.4 - 103.2 µg DA / g)
Associated syndrome:	ASP
Unexplained toxicity:	No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme:	Yes (Monitoring Programme of the Centro de Control do Medio Mariño.)
Event occurred before in this location:	Yes
Individuals to contact:	MANEIRO, Juan , PAZOS, Yolanda , SALGADO, Covadonga

Location & Date

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Location:	Latitude: 43.233333, Longitude: -8.966667
General location information:	Ría de Cedeira, Ría de Corme-Laxe, Ría de Cam, Galicia, NW Spain. HAB Area code(s): ES-05 ES-06
Additional location information:	43º 39' - 43º 07' N; 08º 04' - 09º 10' W.
Bloom event dates (yyyy/mm/dd):	Event Date:2002-05-06 Start: 2002-04-30, End: 2002-05-14
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:

Microalgae

Causative organism known:	Yes
Causative Species/Genus:	Pseudo-nitzschia australis (90,480 cells/L) 43º 14' N ;08º 58' W (St. GD) on 06/05/02. Pseudo-nitzschia australis (266,220 cells/L) 43º 15' N; 09º 59' W (St. G5) on 13/05/02.
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known:	5.4 µg/L Chlª at 43º 14' N ; 08º 58' W (St. G µg/l
Additional bloom information:
Event-related bibliography:

Environmental Conditions

Weather:	Rainy.	Turbidity (NTU):	Wind direction:
Stratified water:	No	Oxygen content (nL/L):	Wind velocity:	98
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:

Surface

Growth:

In situ

Growth Comments

Additional Environmental information:

Data from St. GD & St.C5. Wind velocity: 98 Km/h. Wind direction: Variable.

Toxin Assay Information

Species containing the toxin	Toxin type	Toxin details	Max. concentration	Assay type
Wild mussel (Mytilus galloprovincialis)	Domoic Acid	DA eq	27.4 µg/g	LC
Clams	Domoic Acid	DA eq	103.2 µg/g	LC
Razor clam (Ensis siliqua)	Domoic Acid	DA eq	38.1 µg/g	LC
Razor clam (Ensis ensis)	Domoic Acid	DA eq	71.4 µg/g	LC

Kit used: No

Type of kit used:

Additional information:

AOAC Official Method, 1998 991,26, Domoic Acid in Mussels. Liquid Chromatographic Method.

Economic losses:

Management decision:

Harvesting was closed in culture areas when domoic acid concentrations was greater than 20 ppm.

Additional harmful effect information:

Irrelevant effects, because the closures caused by this event were brief (two weeks maximum). Closures due to the presence of toxicity in molluscs is usual in the area and resource exploitation strategies allows to face these closures without great proble