General Information

Event name: GB-98-004
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 (PSP has regularly occurred in this area since 1991.)
Individuals to contact: HOWARD, Godfrey , KELLY, Marie

Location & Date

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Location: Latitude: , Longitude:
General location information: String, Orkney Islands.
HAB Area code(s): GB-20
Additional location information:
Bloom event dates (yyyy/mm/dd): Event Date:1998-05-18
Start: 1998-02-01, End: 1999-01-19
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: February-August


Causative organism known: Yes
Causative Species/Genus: Alexandrium spp. (5,000 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:
Growth Comments
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Blue mussels Saxitoxins STX eq 1,675 Bioassay-Mouse
Kit used: Type of kit used:
Additional information:
Economic losses:
Management decision: Food and Environment Protection Act 1985 (FEPA) closure order in place from June to Jan. This order was partially revoked as areas became clear of toxins
Additional harmful effect information: PSP detected from May to Jan 1999, maximum level recorded.
Updated at 03:02 on 15 Apr 2018