General Information

Event name: NO-90-006
Country: NORWAY
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes
Associated syndrome: DSP
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 more dubious historical records. A yearly, more or less large scale and long lasting phenomenon since 1984 according to mouse bioassay.)
Individuals to contact: DAHL, Einar , HARBITZ, O.

Location & Date

Location: Latitude: , Longitude:
General location information: ,
HAB Area code(s):
Additional location information: Nearly all along the coast of Norway.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: More or less around the year.

Microalgae

Causative organism known: Yes
Causative Species/Genus: Dinophysis spp. ( cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: D. acuta has been shown to be the most potent toxin source among the Dinophysis spp. along the southern coast of Norway.
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:
Growth Comments Along the southern coast there are some evidence that the algae and toxin problems are spread by advection.
Additional Environmental information: The problem may occur over a wide range of temperatures and salinities.

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: No Type of kit used:
Additional information:
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 according to mouse bioassay. Harvesting and consumption banned.
IOC/UNESCO ISSHA
IOC/UNESCO ICES PICES