General Information

Event name: NO-02-011
Country: NORWAY
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 3805-169 µg/kg DSP, 659-234 µg STX/kg)
Associated syndrome: DSP , PSP
Unexplained toxicity: Yes (DSP and PSP in Flødevigen week 30-32)
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, Mona Ring

Location & Date

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Location: Latitude: , Longitude:
General location information: Skagerrak, Hvaler-Dalskilen
HAB Area code(s): NO-12
Additional location information: Hvaler(Borg):W26-49,Moss:W29-40,Asker(Vollen):W30-40,Tønsberg(Vallø):W27-34,Kragerø(Saltneven):W27-35,Arendal(Flødevigen):W25-46,Dalskilen:W25-49.
Bloom event dates (yyyy/mm/dd): Start: 2002-06-17, End: 2002-12-02
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Dinophysis acuta (1240 cells/L)
Dalskilen w 25
Dinophysis acuminata (12000 cells/L)
Flødevigen w25
Dinophysis norvegica (4000 cells/L)
Flødevigen w 26
Co-Ocurring Species/Genus: Pseudo-nitzschia spp. (1050000 cells/L)
Borg w 35
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: Whole column
Growth Comments
Additional Environmental information: Sampling aprox 0-3 meters

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
D. acuta Okadaic Acid OA 1240 cells/L Other
D.acuminata Okadaic Acid OA 12000 c/L Other
D. norvegica Okadaic Acid OA 4000 c/L Other
Dinophysis spp. Okadaic Acid OA 3805 µg/kg Bioassay-Mouse
Kit used: No Type of kit used:
Additional information:
Economic losses: Mussel plants were banned from harvesting.
Management decision: Harvesting was stopped and the public was warned.
Additional harmful effect information: No intoxications wer reported, the public was warned.
Created at 01:04 on 12 Apr 2016