General Information

Event name: NO-94-003
Country: NORWAY
Nature of the harmful event:
High Phyto concentration
Event directly affected:
Toxicity detected: No
Associated syndrome:
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes
Event occurred before in this location: Yes (Blooms re-occurred every summer since 1989.)
Individuals to contact: DAHL, Einar

Location & Date

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Location: Latitude: , Longitude:
General location information: Ryfylkefjordene (near Stavanger)., South-West coast
HAB Area code(s): NO-09
Additional location information:
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: July-August.


Causative organism known: Yes
Causative Species/Genus: Prymnesium sp. (2,000,000 cells/L)
Prymnesium cf. Parvum
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: Yes Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: 8 Current Velocity: 0
Nutrient information:
Temperature Range During Event: Max: 19 °C, Min: 16 °C
Salinity Range During Event:
Bloom location in the water column:
Growth: Advected
In situ
Growth Comments In situ growth in a fjord and some advection of algae and toxic water to nearby waters.
Additional Environmental information: A pycnocline present at 2-3m depth and a salinity of about 8 psu in the mixed surface layer.

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: Threatened fish farms escaped the area.
Additional harmful effect information: None effects.
Updated at 02:37 on 5 Mar 2018