General Information

Event name: ES-03-010
Country: SPAIN
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 0.4-290 g/g DA.)
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 (Detected annualy from 1995; generally with a periodicity of two events a year: at the beginning - middle of spring and autumn.)
Individuals to contact: MANEIRO, Juan , PAZOS, Yolanda , MOROO, ngeles

Location & Date

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Location: Latitude: 43.392833, Longitude: -8.285167
General location information: Ra de Cedeira, Ra de Ferrol, Ra de Ares-Be, Galicia, NW Spain.
HAB Area code(s): ES-05 ES-06 ES-08
Additional location information: 43 39.55' - 42 08.22' N; 08 03.59' - 09 03.00' W.
Bloom event dates (yyyy/mm/dd): Event Date:2003-04-29
Start: 2003-04-22, End: 2003-06-17
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Pseudo-nitzschia spp. (451,440 cells/L)
43 23.57' N; 08 17.11' W (St. L1) 29/04/03
Co-Ocurring Species/Genus: Leptocylindrus danicus (135,135 cells/L)
Chaetoceros spp. (47,520 cells/L)
Rhizosolenia shrubsolei (5,940 cells/L)
Chlorophyll concentration, if known: 5.2 g/L Chl. µg/l
Additional bloom information:
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction: SW
Stratified water: No Oxygen content (nL/L): Wind velocity: 85
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity: 0
Nutrient information: AMONIUM: 0.29 g/L
NITRATE: 0.12 g/L
NITRITE: 0.25 g/L
Temperature Range During Event: Max: 20 °C, Min: 12 °C
Salinity Range During Event: Max: 35, Min: 27
Bloom location in the water column:
In situ
Growth Comments
Additional Environmental information: Wind velocity: 85 Km/h.

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Raft cultured mussel (Mytilus galloprovincial Domoic Acid DA eq 173.4 g/g Bioassay-Mouse
Wild mussel (Mytilus galloprovincialis) Domoic Acid DA eq 108.6 g/g Bioassay-Mouse
Cockle (Cerastoderma edule) Domoic Acid DA eq 119 g/g Bioassay-Mouse
Clams Domoic Acid DA eq 290 g/g Bioassay-Mouse
Razor clam (Solen marginatus) Domoic Acid DA eq 53 g/g Bioassay-Mouse
Warty venus (Venus verrucosa) Domoic Acid DA eq 60.8 g/g Bioassay-Mouse
Kit used: No Type of kit used:
Additional information: AOAC Official Method, 1998 991.26, Domoic Acid in Mussels. Liquid Chromatographic Method.
Economic losses: Not evaluated
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