General Information

Event name: GB-01-001
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 80 -400 g STX/100g)
Associated syndrome: PSP
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (Scottish Government Shellfish Toxin Monitoring Programme)
Event occurred before in this location: Yes (See earlier HAEDAT forms from this location)
Individuals to contact: BRESNAN, Eileen , TURRELL, Elizabeth

Location & Date

[View larger map]
Location: Latitude: 58.958056, Longitude: -2.985556
General location information: East coast, Orkney Islands, Scotland
HAB Area code(s): GB-20 GB-23
Additional location information: These events were recorded along the east coast of Scotland and in Orkney
Bloom event dates (yyyy/mm/dd): Start: 2001-05-10, End: 2001-06-01
Quarantine levels dates (yyyy/mm/dd): First detection: 2001-05-15, End: 2001-06-19
Additional date-related information: Toxin levels exceeding the quarentine limits were detected in both Mytilus edulis and Pecten maximus. PSP levels in M. edulis declined to concentrations below the closure limit before the 1st June 2001, high levels remained in P. maximus until January of 2002.


Causative organism known: Yes
Causative Species/Genus: Alexandrium spp. (2200 cells/L)
Genus level identificaiton
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: 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
Mytilus edulis Saxitoxins 245 g STX eq/100g Bioassay-Mouse
Pecten maximus Saxitoxins 248 g STX Bioassay-Mouse
Kit used: Type of kit used:
Additional information:
Economic losses:
Management decision: Shellfish harvesting areas were closed for the relevant species until PSP toxin concentrations declined below 80 g STX eq/100g for two consecutive weeks.
Additional harmful effect information:
Updated at 04:13 on 14 Apr 2018