General Information

Event name: NO-02-003
Country: NORWAY
Nature of the harmful event:
High Phyto concentration , Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 709-168 µg/kg)
Associated syndrome: DSP
Unexplained toxicity: Yes (DSP and AZA in Flødevigen/Arendal, Week 42)
Species implicated in toxin transmission (transvector): Mytilus edulis
Report the outcome of a monitoring programme: Yes (Norwegian Food Safety Autority monitoring program)
Event occurred before in this location:
Individuals to contact: Kleiven

Location & Date

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Location: Latitude: , Longitude:
General location information: Skagerak,
HAB Area code(s): NO-12
Additional location information: Hvaler, Borg (W42-45, Gullholmen, Moss (42-45), Vallø, Tønsberg (44-45), Kragerø(40-45), Arendal, Flødevigen (40-45), Dalskilen, Vest-Agder (43-45). No data after week 45.
Bloom event dates (yyyy/mm/dd): Start: 2004-09-27, End: 2004-11-01
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Dinophysis acuta (520 cells/L)
W 43
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 Sampling aprox 0-3 meters
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
mytilus edulis Azaspiracids AZA1 331 µg /kg Bioassay-Mouse
Mytilus edulis Okadaic Acid OA 709 µg /kg Bioassay-Mouse
Kit used: Type of kit used:
Additional information:
Economic losses:
Management decision: Harvesting was locally banned. The public was warned against picking toxic mussels.
Additional harmful effect information:
Created at 01:36 on 3 Mar 2015
Updated at 10:24 on 10 Mar 2015