General Information

Event name: NO-91-002
Country: NORWAY
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 17,039 ME.)
Associated syndrome: PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector): Mussels.
Report the outcome of a monitoring programme: Yes
Event occurred before in this location: Yes (A few historical records and more or less regular occurrences the recent years, however, the spatial and temporal extent may vary significantly from one year to another.)
Individuals to contact: TANGEN, Karl , VARRAN, Gesche Torp

Location & Date

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Location: Latitude: , Longitude:
General location information: Trondelag., MID-NORWAY.
HAB Area code(s): NO-05
Additional location information:
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: September 91.


Causative organism known: Yes
Causative Species/Genus: Alexandrium excavatum ( cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
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:
In situ
Growth Comments Mainly due in situ growth?
Additional Environmental information: No information.

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Saxitoxins 17,039 ME Bioassay-Mouse
Kit used: Type of kit used:
Additional information: Toxins recorded above the action level according to mouse bioassay. Higest recording 17,039 ME.
Economic losses:
Management decision: Harvesting was locally banned. The public was warned against picking toxic mussels.
Additional harmful effect information:
Updated at 02:31 on 5 Mar 2018