General Information

Event name: SE-98-001
Country: SWEDEN
Nature of the harmful event:
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: LINDAHL, Odd

Location & Date

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Location: Latitude: , Longitude:
General location information: Skagerrak and Kattegat.,
HAB Area code(s): SE-07 SE-08
Additional location information: The bloom was first observed just north of Jutland and developed then to cover the whole Skagerrak and most of the Kattegat. In mid.May it culminated west of Denmark.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: April - May.


Causative organism known: Yes
Causative Species/Genus: Chattonella sp. (6,000,000 cells/L)
Chattonella cf. Verruculosa. Identification not verified
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: Toxicity concentration: Unknown
Event-related bibliography:

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:
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: Very varying

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: Public and media information
Additional harmful effect information: Fish kills. Vild garfish, herring, mackerel
Updated at 08:31 on 18 Mar 2020