General Information

Event name: IS-94-001
Country: ICELAND
Nature of the harmful event:
High Phyto concentration
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: No
Event occurred before in this location: No
Individuals to contact: THÓRDARDÓTTIR, Thórunn

Location & Date

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Location: Latitude: , Longitude:
General location information: Faxaflói., West coast.
HAB Area code(s): IS-01
Additional location information: On May 20th, in the traditional spring survay of MRI, considerable number of A. tamarense and A. ostenfeldii cells were found in netsamples at the station in the outer part of Faxaflói. Because of these findings it was considered urgent to get samples from the inner area, specially in Hvalfjörôur, where there are rich beds of blue-mussels. The monitoring of harmful algae was not on the programme in this area and therefore the following information is based on relatively few samples, not systematically collected.
Bloom event dates (yyyy/mm/dd): Event Date:1994-05-31
Start: 1994-05-20, End: 1994-06-20
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Alexandrium spp. (25,000 - 1 cells/L)
At stations 1 and 3, Surface samples on May 31
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: Around June 20 the cell numbers has dropped to several hundreds. Further sampling which was carried out in July (13 and 19) and in August (15 and 31) showed that Alexandrium cells were absent in net samples at these stations.
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
Kit used: Type of kit used:
Additional information:
Economic losses:
Management decision: It was decided to ban all harvesting of shellfish within the inner part of the bay.
Additional harmful effect information: In the innermost part of Hvalfjörôur (st.1) samples of mussels were taken for mouse testing PSP. The sampling was carried out at the following dates 24/5, 27/5, 6/6, 14/7and 22/8. In all cases, PSP was below the detection limit.
Updated at 10:47 on 3 Apr 2019