General Information

Event name: ES-21-020
Country: SPAIN
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 212-604 g OA eq./kg)
Associated syndrome: DSP
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes
Event occurred before in this location: Yes (annually in spring)
Individuals to contact: REVIILLA, Marta , SOLAUN, Oihana

Location & Date

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Location: Latitude: 43.356667, Longitude: -2.448056
General location information: Longline Mendexa, Basque Country
HAB Area code(s): ES-01
Additional location information: open marine waters
Bloom event dates (yyyy/mm/dd): Start: 2021-03-08, End: 2021-03-18
Quarantine levels dates (yyyy/mm/dd): First detection: 2021-03-10, End: 2021-03-29
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Dinophysis acuminata (1540 cells/L)
Max. 2021-03-08, at 10-20 m; from surface to 20 m >1000 cells/L (hose)
Co-Ocurring Species/Genus: Dinophysis caudata (20 cells/L)
2021-03-08; 10-20 m
Dinophysis fortii (20 cells/L)
2021-03-08; 0-10 m
Chlorophyll concentration, if known: 1.1 (maximum, at 13 m) µg/l
Additional bloom information: High spatial variability in the abundance of D. acuminata between 2 sampling stations 2 km apart.
Event-related bibliography:

Environmental Conditions

Weather: February warmer than usual Turbidity (NTU): Wind direction:
Stratified water: No Oxygen content (nL/L): Wind velocity:
Temperature (°C): 12.3-12.6 Oxygen saturation %: Current Direction:
Sechhi disk (m): 15 Salinity: 34.7-35.4 Current Velocity:
Nutrient information:
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column:
Growth: Advected
Growth Comments It is assumed, as in samples collected 5, 4 and 3 days before the peak, Dinophysis was scarce (20 cells/L or not detected).
Additional Environmental information: Chl-a and hydrographic data refer to the water column (0-30 m), on 2021-03-08.

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Mytilus galloprovincialis Okadaic Acid OA 604 ug OA eq./kg LC-MS
Kit used: No Type of kit used:
Additional information:
Economic losses:
Management decision: Closure of the bivalves production zone from 2021-03-10 to 2021-04-15
Additional harmful effect information:
Created at 12:16 on 4 May 2022
Updated at 12:15 on 9 May 2022