General Information

Event name: FO-89-002
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes
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 (Every spring/summer since 1984 when the first investigations were made.)
Individuals to contact: GAARD, Eilif

Location & Date

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Location: Latitude: , Longitude:
General location information: Trongisvágsfjord, Suduroy Island.
HAB Area code(s): FO-01
Additional location information: The bloom developed in the innermost part of the fjord.
Bloom event dates (yyyy/mm/dd): Event Date:1989-06-08
Start: 1989-05-01, End: 1989-06-30
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: May-June


Causative organism known: Yes
Causative Species/Genus: Alexandrium excavatum (2,100,000 cells/L)
on June 8th.
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: Yes 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: 10.3 °C, Min: 7.5 °C
Salinity Range During Event: Max: 35, Min: 30
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
Kit used: Type of kit used:
Additional information:
Economic losses:
Management decision: Warning.
Additional harmful effect information: PSP toxicity in shellfish. No fish mortality.