General Information

Event name: ES-03-013
Country: SPAIN
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 227.0 µg/g DA.)
Associated syndrome: ASP
Unexplained toxicity: Yes (ASP toxicity remains very long time after disappearance of Pseudo-nitzschia cells in the water column.)
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 , MOROÑO, Ángeles

Location & Date

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Location: Latitude: , Longitude:
General location information: Rías Baixas (Vigo, Pontevedra, Arousa and Mur, Galicia, NW Spain.
HAB Area code(s): ES-06 ES-07 ES-08
Additional location information: 42º 10.90' - 43º 24.55' N; 8º 41.11' - 9º 03.00' W. The affected area is dedicated to intensive mussel cultivation in rafts and to a high production of other molluscs in natural banks: clams, cockles, oyster and scallops are the main species exploited.
Bloom event dates (yyyy/mm/dd): Start: 2003-01-01, End: 2003-12-31
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Pseudo-nitzschia spp. ( cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: C. Salgado, J. Maneiro, J. Correa, J.L. Pérez, F. Arévalo, in press. ASP biotoxins in scallops: the prectical application in Galicia of Commision decision 2002/226/EC. Proceedings of the 4th International Conference on Molluscan Shellfish Safety.

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 Comments
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Scallops (Pecten maximus) Domoic Acid DA eq 227.0 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: Not evaluated. Very important socioeconomic effects.
Management decision: The change in the rules for harvesting of toxic scallops due to the Autonomous Government Regulation of 15th January, based on the Council Directive 91/492/EEC (Comission decision of 15th March 2002) allowed the harvesting of scallops in the Rías de Vigo
Additional harmful effect information: The scallop production areas in Galicia remained closed to the harvesting due to the fact that this type of shellfish has been affected by ASP toxicity during the whole year. Pseudo-nitzschia blooms detected (see attached reports) doesn´t seem to explain
Updated at 11:01 on 23 Mar 2017