General Information

Event name: ES-90-003
Country: SPAIN
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes
Associated syndrome: DSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes
Event occurred before in this location: Yes (D. acuta and D. acuminata has been found in the rias Gallegas since the begining of the monitoring programe in 1977 and sometimes linked to DSP episodes. In 1988, 1989 and 1990 both species were associated with the presence of DSP episodes.)
Individuals to contact: BRAVO, Isabel , REGUERA, Beatriz

Location & Date

[View larger map]
Location: Latitude: , Longitude:
General location information: Rķas Bajas Gallegas., Galicia, NW Spain.
HAB Area code(s): ES-07 ES-08
Additional location information: Vigo, Pontevedra, Arosa and Muros.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Summer and autumn.


Causative organism known: Yes
Causative Species/Genus: Dinophysis acuminata (23,000 cells/L)
1 August. Observed from 5 June to 29 October in Ria de Muro
Dinophysis acuta (35,500 cells/L)
Max conc in August. From July to November Vigo, Pontevedra and Arosa
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: Other species of Dinophysis (D. rotundata, D. caudata and D. tripos) occurred in lower concentrations. Dinophysis cells comprised a small percentage of the total phytoplankton. Sampling was carried out with a hose-sampler (recommended by I.C.E.S., WG of
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: 35 Current Velocity: 0
Nutrient information:
Temperature Range During Event: Max: 18 °C, Min: 15 °C
Salinity Range During Event:
Bloom location in the water column:
Growth: Advected
In situ
Growth Comments Both mechanisms could occur. Dinophysis acuta concentrations are usually higher offshore, and they seem to be pushed into the rias when winds change from northerly to southerly. This mechanism is suggested for D. acuta in the autumn in the Rias Bajas. The
Additional Environmental information: In July and in August there was an strong thermal gradient between 0 and 15 m with the most marked stratification at the end of July.

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: Collection and sale of bivalves was forbidden.
Additional harmful effect information: DSP was detected in mussel cutlivated on rafts on 9 July and it continued until October coinciding with a PSP episode which fishished on 7 November. Intraperitoneal mouse test.