General Information

Event name: NO-95-004
Country: NORWAY
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 1,400 MU.)
Associated syndrome: PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
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 along the west coast the recent years, however, the spatial and temporal extent may vary significantly from one year to another.)
Individuals to contact: DAHL, Einar

Location & Date

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Location: Latitude: , Longitude:
General location information: , West coast.
HAB Area code(s): NO-08 NO-09
Additional location information:
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: March - June 1995. 500 ME/100 g recorded at one station in March. Highest toxicity recorded in May, 1.400 ME/100 g.


Causative organism known: Yes
Causative Species/Genus: Alexandrium spp. ( 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 to in situ growth?
Additional Environmental information: Environment: No information.

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Saxitoxins 400 ME/100 g Bioassay-Mouse
Saxitoxins 1.400 ME/100 g Bioassay-Mouse
Kit used: Type of kit used:
Additional information: Control of shellfish toxicity by mouse bioassay.
Economic losses:
Management decision: Harvesting was locally banned. The public was warned against picking toxic mussels.
Additional harmful effect information: Toxins recorded above the action level (400 ME/100 g) according to mouse bioassay.
Updated at 04:19 on 2 Dec 2019