General Information

Event name: LV-95-003
Country: LATVIA
Nature of the harmful event:
High Phyto concentration
Event directly affected:
Toxicity detected: No
Associated syndrome:
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes
Event occurred before in this location: Yes (Increase of cells density was observed since 1988.)
Individuals to contact: BALODE, Maija

Location & Date

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Location: Latitude: , Longitude:
General location information: Gulf of Riga,
HAB Area code(s): LV-02
Additional location information: Southern part of the nearshore area.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: July.


Causative organism known: Yes
Causative Species/Genus: Dinophysis acuminata (11,000 cells/L)
Dinophysis rotundata ( cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography:

Environmental Conditions

Weather: Calm and sunny 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: °C, Min: °C
Salinity Range During Event: Max: 6, Min: 4
Bloom location in the water column:
In situ
Growth Comments
Additional Environmental information: High water temperature. The highest concentrations of D. acuminata were marked in the zone of brackish waters at 20 m, 30 m stations (above the termocline).

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: Type of kit used:
Additional information:
Economic losses:
Management decision:
Additional harmful effect information: Effects: Not observed.
Updated at 09:48 on 3 Dec 2019