General Information

Event name: PT-01-003
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 5,239 mg OAeq./Kg)
Associated syndrome: DSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector): Mollusc bivalves, mainly Mitylus edulis, but other species were affected for shorter periodes.
Report the outcome of a monitoring programme: Yes (Monitoring programme.)
Event occurred before in this location: Yes
Individuals to contact: SAMPAYO, M Antonia

Location & Date

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Location: Latitude: 40.833333, Longitude: -9.200000
General location information: Aveiro.,
HAB Area code(s): PT-02
Additional location information: Longitude from: 9 12' -- 8 50' W. Coastal and estuarine (River Mondgo).
Bloom event dates (yyyy/mm/dd): Start: 2001-06-11, End: 2001-11-12
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Only Mytilus edulis were affected all the time.


Causative organism known: Yes
Causative Species/Genus: Dinophysis sp. (17,890 cells/L)
Dinophysis cf. Acuminata. On the 1st July.
Dinophysis acuta ( cells/L)
Dinophysis fortii ( cells/L)
Co-Ocurring Species/Genus: Ceratium fusus (140,000 cells/L)
And several other species inclunding diatoms, with a total n 800,000 cells/L
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: No 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: 22 °C, Min: 17 °C
Salinity Range During Event: Max: 37, Min: 31
Bloom location in the water column:
Growth Comments
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Cerestoderma edule Okadaic Acid OA eq 5,239 mg/Kg Bioassay-Mouse
Kit used: No Type of kit used:
Additional information: Assay type: Mice bioassay and LC-MS. Yasumoto method for bioassay; Lee et al. (1987) for LC-MS.
Economic losses:
Management decision: Close the area by species to catch whenever positive results were obtained on the bioassay or LC-MS gave results above 0.16 mg OK equiv./Kg.
Additional harmful effect information:
Checked at 05:33 on 22 Feb 2018