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 g 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 Mario.)
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: Ra de Cedeira, Ra de Corme-Laxe, Ra de Cam, Galicia, NW Spain.
HAB Area code(s): ES-05 ES-06
Additional location information: 43 39' - 43 07' N; 08 04' - 09 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:


Causative organism known: Yes
Causative Species/Genus: Pseudo-nitzschia australis (90,480 cells/L)
43 14' N ;08 58' W (St. GD) on 06/05/02.
Pseudo-nitzschia australis (266,220 cells/L)
43 15' N; 09 59' W (St. G5) on 13/05/02.
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: 5.4 g/L Chl at 43 14' N ; 08 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:
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 g/g LC
Clams Domoic Acid DA eq 103.2 g/g LC
Razor clam (Ensis siliqua) Domoic Acid DA eq 38.1 g/g LC
Razor clam (Ensis ensis) Domoic Acid DA eq 71.4 g/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