General Information

Event name: NO-90-008
Country: NORWAY
Nature of the harmful event:
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: JOHNSEN, Torbjorn M.

Location & Date

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Location: Latitude: , Longitude:
General location information: The Sandsfjord system, WESTERN NORWAY
HAB Area code(s): NO-09
Additional location information: Ryfylke, Rogaland,
Bloom event dates (yyyy/mm/dd): Start: 1990-07-01, End: 1990-08-15
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: July - mid August


Causative organism known: Yes
Causative Species/Genus: Prymnesium parvum (3,800,000 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: 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: 18 °C, Min: 12 °C
Salinity Range During Event: Max: 9, Min: 4
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: Inside the fjord system: Movement of fish cages from brackish to marine environment. Outside the fjord system: Pumping of deep water to prevent toxic brackish water moving into the fish cages.
Additional harmful effect information:
Updated at 02:28 on 5 Mar 2018