General Information

Event name: NO-11-002
Country: NORWAY
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 3154-68µg/kg)
Associated syndrome: DSP
Unexplained toxicity:
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: Skagerrak,
HAB Area code(s): NO-12
Additional location information: Høkeliholmen, Hvaler(29-49), Sandøy, Hvaler (34-49), Asker (34-35), Moss (34-39), Tønsberg (38-47),Larvik(29-50), Kragerø(28-32), Risør(23-50), Flødevigen,Arendal (25-31)
Bloom event dates (yyyy/mm/dd): Start: 2011-06-06, End: 2011-12-26
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Alexandrium pseudogonyaulax (24000 cells/L)
Høkliholmen, W32
Alexandrium tamarense (180 cells/L)
Flødevigen, W30
Co-Ocurring Species/Genus: Dinophysis acuta (1040 cells/L)
Moss, W37
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 Okadaic Acid OA 992µg/kg Bioassay-Mouse
Kit used: Type of kit used:
Additional information: Mouse bioassay. Mortality: Høkliholmen, W39/41/43/47/49: 4mouse/4 mouse/3 mouse/2mouse/2 mouse
Economic losses:
Management decision: Harvesting was locally banned. The public was warned against picking toxic mussels.
Additional harmful effect information:
Created at 12:47 on 13 Feb 2015
Updated at 12:50 on 13 Feb 2015