General Information

Event name: NO-19-025
Country: NORWAY
Nature of the harmful event:
High Phyto concentration , Mass mortalities
Event directly affected:
Aquaculture Fish
Toxicity detected: No
Associated syndrome:
Unexplained toxicity: Yes
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: No
Event occurred before in this location:
Individuals to contact: Kleiven

Location & Date

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Location: Latitude: 68.501667, Longitude: 17.434444
General location information: Troms, Norwegian Sea
HAB Area code(s): NO-03
Additional location information: Ofotfjorden and Astafjorden.
Bloom event dates (yyyy/mm/dd): Start: 2019-05-10, End: 2019-06-09
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Chrysochromulina leadbeateri (14900000 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography:

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
Kit used: Type of kit used:
Additional information: The bloom started in Astadfjorden in Troms 14-18. may,the first report of mortality was in Ofotfjorden 14 th of May. The 21 th there was reported mortality in the outer part of Ofotfjorden and Rinøya.From the 21. may the bloom spread to Øksfjord and Hamarøy. 21-30. may the mortality decreased.
Economic losses: Farmed salmon-4,2 and 4 millions individuals.
Management decision: increased focus on monitoring, new equipment and reasearch.
Additional harmful effect information:
Created at 11:18 on 8 Oct 2019
Updated at 11:19 on 8 Oct 2019