General Information

Event name: NO-10-010
Country: NORWAY
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: DSP: 953-278 g/kg, YTX: 1103 g/kg)
Associated syndrome: DSP , OTHER
Unexplained toxicity: Yes (DSP and YTX at Varaneset week 36)
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

[View larger map]
Location: Latitude: , Longitude:
General location information: north sea, north,
HAB Area code(s): NO-08
Additional location information:
Bloom event dates (yyyy/mm/dd): Start: 2010-07-19, End: 2010-11-01
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Dinophysis acuta (720 cells/L)
Varaneset, W29
Alexandrium spp. (480 cells/L)
Varaneset, W31
Co-Ocurring Species/Genus: Dinophysis acuminata (1160 cells/L)
Hyvika, W29
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 Yessotoxins YTX 1103g/kg Bioassay-Mouse
Mytilus edulis Okadaic Acid OA 953g/kg Bioassay-Mouse
Kit used: Type of kit used:
Additional information: Mouse bioassay. Mortality: Hyvika, W35: 2/3 mouse, Varaneset, W29: 2/3 mouse.
Economic losses:
Management decision: Harvesting was locally banned. The public was warned against picking toxic mussels.
Additional harmful effect information:
Created at 09:07 on 17 Feb 2015
Updated at 09:12 on 17 Feb 2015