General Information

Event name: DK-98-003
Country: DENMARK
Nature of the harmful event:
High Phyto concentration , Mass mortalities
Event directly affected:
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: ANDERSEN, Per

Location & Date

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Location: Latitude: , Longitude:
General location information: Ringkjobing and Limfjord Fjord., North Sea.
HAB Area code(s): DK-08
Additional location information: During spring a bloom of one several species from the flagellate genus Chatonella was observed in some fjords connected to the North Sea (Ringkjobing Fjord and the Limfjord) as well as in the northern part of Kattegat.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: During spring.


Causative organism known: Yes
Causative Species/Genus: Chattonella spp. ( cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: The phytoplankton in Danish coastal waters and fjords in 1998 was characterized by relatively low concentrations and biomasses in the spring and most of the summer period. The low biomasses during summer period were primarely the result of low input of
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:
Growth Comments
Additional Environmental information:

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:
Updated at 05:27 on 8 Sep 2019