Harmful Algal Information System: Event ES-99-020

General Information

Event name:	ES-99-020
Country:	SPAIN
Nature of the harmful event:	Seafood toxins
Event directly affected:	Shellfish
Toxicity detected:	Yes
Associated syndrome:	DSP
Unexplained toxicity:	No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme:	Yes (Monitoring programme of the Centro de Control da Calidade do Medio Mariño.)
Event occurred before in this location:	Yes (The DSP episodes caused by D. acuminata are a recurrent phenomenon in the Galician Rías with more or less incidence depending on the year.)
Individuals to contact:	MANEIRO, Juan , PAZOS, Yolanda , MOROÑO, Ángeles

Location & Date

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Location:	Latitude: , Longitude:
General location information:	Rías of Pontevedra, Muros and Ares; mouth of, 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:	From May to September with several pulses.

Microalgae

Causative organism known:	Yes
Causative Species/Genus:	Dinophysis acuminata (5,000 cells/L) Dinophysis acuminata with a maximum cell concentration of approximately 5,000 cells per liter was detected in the middle part of the Ría de Pontevedra on May
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:	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:

Advected
In situ

Growth Comments

In any hydrological situation (soft upwelling and downwelling and relaxation of both).

Additional Environmental information:

Toxin Assay Information

Species containing the toxin	Toxin type	Toxin details	Max. concentration	Assay type
Mussel	Okadaic Acid	OA eq	Positive	Bioassay-Mouse

Kit used: No

Type of kit used:

Additional information:

Economic losses:

Management decision:

Harvesting was closed in the culture areas affected.

Additional harmful effect information:

Due to the persistence of the toxic cells, although in small pulses, the bans of culture and harvested areas were continuous during nearly 5 months especially in the Ría de Pontevedra.