General Information

Event name: ES-21-023
Country: SPAIN
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 6.50 mg YTX eq./kg)
Associated syndrome: OTHER
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes
Event occurred before in this location: No
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): Event Date:2021-06-01
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Toxicity decreased quickly


Causative organism known: No
Causative Species/Genus: Protoceratium reticulatum (382 cells/L)
2021-05-19, 0-10 m (hose), max. found in the production area in the last 4 years.
Co-Ocurring Species/Genus: Gonyaulax spinifera (20 cells/L)
Lingulodinium polyedra (40 cells/L)
Chlorophyll concentration, if known: 0.1 µg/l
Additional bloom information: 2021-05-06, Protoceratium reticulatum (8499 cells/L) in surface waters, 40 km westward of the production area.
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: Yes Oxygen content (nL/L): Wind velocity:
Temperature (°C): 14.7-16.1 Oxygen saturation %: Current Direction:
Sechhi disk (m): 13 Salinity: 35.2-35.2 Current Velocity:
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: Chl-a and hydrographic data refer to the water column (0-30 m), on 2021-06-01.

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Mytilus galloprovincialis Yessotoxins 45-OHYTX 2.80 mg YT LC-MS
Mytilus galloprovincialis Yessotoxins YTX 3.70 mg YTX eq./kg LC-MS
Kit used: No Type of kit used:
Additional information:
Economic losses:
Management decision: The bivalves production zone was already closed due to OA (ES-21-022). Therefore, no action was taken.
Additional harmful effect information:
Created at 11:51 on 9 May 2022
Updated at 12:33 on 9 May 2022