General Information

Event name: PT-13-034
Nature of the harmful event:
Water Discoloration , High Phyto concentration , Seafood toxins
Event directly affected:
Natural Fish , Shellfish , Humans
Toxicity detected: Yes (Approximate range: 2.4x10(4) micrograms STX equiv./Kg)
Associated syndrome: PSP
Unexplained toxicity:
Species implicated in toxin transmission (transvector): Ruditapes decussatus, Mugil sp.
Report the outcome of a monitoring programme: No
Event occurred before in this location: No
Individuals to contact: BRANCO, Maria Ana

Location & Date

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Location: Latitude: , Longitude:
General location information: Northeastern Atlantic Ocean, Azores
HAB Area code(s): PT-11
Additional location information: São Jorge island. Sto Cristo coastal lagoon
Bloom event dates (yyyy/mm/dd): Event Date:2013-09-02
Start: 2013-09-02, End: 2014-04-14
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Alexandrium minutum Halim 1960 (1.3x10(7) cells/L cells/L)
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:
Nutrient information:
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column: Whole column
In situ
Growth Comments
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Ruditapes decussatus Saxitoxins STX eq 2.4x10(4) LC
Mugil sp. Saxitoxins STX eq 2.1x10(3) LC
Kit used: No Type of kit used:
Additional information:
Economic losses:
Management decision: The Competent Authorities in the Azores have temporarily banned shellfish harvesting and are implementing measures to have an effective monitoring program in place.
Additional harmful effect information:
Created at 01:01 on 25 Sep 2020