General Information

Event name: ES-93-003
Country: SPAIN
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 1,550 µg STXeq / 100 g meat.)
Associated syndrome: PSP
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 (Blooms of this species were recorded in the Rías Bajas in autumn 1981, 1985, 1986, 1987, 1988 and 1990. In these two latter years, low abundance populations were also found during summer.)
Individuals to contact: MANEIRO, Juan , MARIÑO, Joaquin , PAZOS, Yolanda

Location & Date

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Location: Latitude: , Longitude:
General location information: Rías of Vigo, Pontevedra, Arousa and Muros., Galicia, NW Spain.
HAB Area code(s): ES-07 ES-08
Additional location information:
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Beginning of July - mid August.


Causative organism known: Yes
Causative Species/Genus: Gymnodinium catenatum (10,280 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: Yes Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: 34 Current Velocity: 0
Nutrient information:
Temperature Range During Event: Max: 20 °C, Min: 18 °C
Salinity Range During Event:
Bloom location in the water column:
Growth: Advected
In situ
Growth Comments The initial increase of the population followed a downwelling episode characterized by homogeneous vertical temperature and salinity distributions in the water column (18-20º C and about 34 PSU in the stations at the mouths of the Rías). The population wa
Additional Environmental information: During the bloom, the water column was stratified (14º C at bottom and 19º C at surface).

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: No Type of kit used:
Additional information:
Economic losses:
Management decision: Harvesting was closed when PSP toxin content was equal or above 80 µg equiv. STX/100 g meat.
Additional harmful effect information: