General Information

Event name: UY-91-002
Country: URUGUAY
Nature of the harmful event:
High Phyto concentration , Seafood toxins
Event directly affected:
Toxicity detected: Yes
Associated syndrome: PSP
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (Natrional Monitoring on HAB and Shellfish Toxicity)
Event occurred before in this location: Yes (PSP was detected in this location 11 years before but this is the first toxic bloom of Alexandrium tatarense in the area)
Individuals to contact: MENDEZ, Silvia

Location & Date

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Location: Latitude: -34.950000, Longitude: -54.933333
General location information: Punta del Este, Maldonado
HAB Area code(s): UY-02
Additional location information:
Bloom event dates (yyyy/mm/dd): Event Date:1991-08-27
Start: 1991-08-21, End: 1991-09-04
Quarantine levels dates (yyyy/mm/dd): First detection: 1991-08-27, End: 1991-10-15
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Alexandrium tamarense (31000 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: Brazeiro A., Méndez S.M. and G. Ferrari. 1997. The first toxic bloom of Alexandrium tamarense in Uruguay: Associated environmental factors. Rev. Atlántica, Río Grande, 19:19-29.

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: 15 °C, Min: 14 °C
Salinity Range During Event: Max: 30.3, Min: 25.2
Bloom location in the water column: Whole column
Growth: Advected
Growth Comments
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Mytilus edulis Saxitoxins 8285 µgSTXeq/100g Bioassay-Mouse
Kit used: Type of kit used:
Additional information:
Economic losses:
Management decision: shellfish closure during toxic period
Additional harmful effect information:
Created at 06:13 on 20 Dec 2013
Updated at 04:49 on 27 Sep 2017