General Information

Event name: FI-90-001
Country: FINLAND
Nature of the harmful event:
High Phyto concentration , Mass mortalities
Event directly affected:
Natural Fish
Toxicity detected: No
Associated syndrome: OTHER
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes
Event occurred before in this location: No
Individuals to contact:

Location & Date

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Location: Latitude: , Longitude:
General location information: A small coastal inlet in Dragsfjärd, SOUTHWEST FINLAND
HAB Area code(s): FI-04
Additional location information:
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: End of June


Causative organism known: Yes
Causative Species/Genus: Prymnesium parvum (50,000,000 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: Before the bloom Chl a 5-10 µg dm(-3). µg/l
Additional bloom information:
Event-related bibliography: Lindholm and Virtanen, 1992:

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: NITRATE: 710-810 µg dm(-3)
PHOSPHATE: 30-36 µg dm(-3)
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column:
In situ
Growth Comments
Additional Environmental information: Water slightly brownish. All values higher than in the archipelago outside the canal. pH: 9.2-9.5.

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: The authorities were informed quite late. Thus sampling was performed when many rotten fishes were still observed. The media was informed.
Additional harmful effect information: Dead and dying fishes of many different species.
Updated at 12:19 on 29 Oct 2019