General Information

Event name: NO-00-001
Country: NORWAY
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: Up to 5000 MU / 100 g mussel meat.)
Associated syndrome: PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector): Mytilus edulis.
Report the outcome of a monitoring programme: Yes (National Monitoring in Norway.)
Event occurred before in this location: Yes (Recurrent.)
Individuals to contact: DAHL, Einar

Location & Date

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Location: Latitude: , Longitude:
General location information: Norwegian coast, in the Moere- and Romsdal co,
HAB Area code(s): NO-06
Additional location information: The highest number of Alexandrium recorded was 150 cells/L (weekly sampling). ICES fishing area: II a.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: May (week 18) - July (week 29).


Causative organism known: Yes
Causative Species/Genus: Alexandrium sp. (150 cells/L)
weekly sampling (0-3 m integrated).
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: The highest number of Alexandrium recorded was 150 cells/L (weekly sampling). Alexandrium spp. occur annually in our coastal waters and PST in mussels above safety level is recorded each year. However, the spatial and temporal distribution of Dinophysis
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: No Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity: 0
Nutrient information:
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column:
Growth Comments
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Mytilus edulis Saxitoxins 5,000 MU Bioassay-Mouse
Kit used: 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 were reported, the public was warned. Standard mouse bioassays were also positive.
Updated at 03:06 on 5 Mar 2018