General Information

Event name: NO-10-001
Country: NORWAY
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: PSP: 6042µg STX/kg, YTX: 2064µg /kg, DSP: 112µg/kg)
Associated syndrome: DSP , OTHER , PSP
Unexplained toxicity: Yes (PSP and DSP in Larvik(W21), PSP and YTX in Flųdevigen (W21) and YTX and DSP in Flųdevigen (W23))
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,
HAB Area code(s): NO-12
Additional location information: Larvik(W17-25), Hvaler(W19-28) and Arendal, Flųdevigen (W20-23)
Bloom event dates (yyyy/mm/dd): Start: 2010-04-26, End: 2010-06-28
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Alexandrium tamarense (200 cells/L)
Hvaler, W21
Co-Ocurring Species/Genus: Dinophysis norvegica (6440 cells/L)
Hvaler (24)
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 Saxitoxins STX 6042µg STX/kg Bioassay-Mouse
mytilus edulis Yessotoxins YTX 2064µg/kg Bioassay-Mouse
mytilus edulis Okadaic Acid OA 112µg/kg Bioassay-Mouse
Kit used: Type of kit used:
Additional information: Mouse bioassay. Mortality: Larvik, W23: 3/3 mouse, Hvaler, W19: 3/3 mouse, Flųdevigen,W23: 3/3 mouse
Economic losses:
Management decision: Harvesting was locally banned. The public was warned against picking toxic mussels.
Additional harmful effect information:
Created at 08:11 on 17 Feb 2015