General Information

Event name: BR-93-001
Country: BRAZIL
Nature of the harmful event:
Mass mortalities
Event directly affected:
Toxicity detected: Yes
Associated syndrome: DSP
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: No
Event occurred before in this location:
Individuals to contact: MENDEZ, Silvia

Location & Date

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Location: Latitude: , Longitude:
General location information: Hermenegildo Beach, Rio Grande do Sul
HAB Area code(s): BR-21
Additional location information:
Bloom event dates (yyyy/mm/dd): Event Date:1993-03-01
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: No
Causative Species/Genus: Dinophysis sp. ( cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: Odebrecht et al 1995. Shellfish mortality and red tide event in Southern Brazil. In Harmful Marine Algal Blooms (Eds) P.Lassus,G.Arzul,E. E.Erard, P. Gentien, C. Marcaillou. Technique et Documentation , Lavoisier, Intercepty Ltd 213-218

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:
Growth Comments
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Mesodesma mactroides Bioassay-Mouse
Kit used: Type of kit used:
Additional information: DSP mouse bioassay positive
Economic losses:
Management decision:
Additional harmful effect information: massive mortality of Mesodesma mactroides
Created at 11:34 on 27 Sep 2017