General Information

Event name: GB-91-002
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 1,490 g STXeq / 100 g tissue)
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 (Common event in this area since first recorded in 1968.)
Individuals to contact: HOWARD, Godfrey , MACDONALD, Elspeth

Location & Date

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Location: Latitude: , Longitude:
General location information: East Coast, Scotland, North England
HAB Area code(s): GB-01 GB-02 GB-23
Additional location information:
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Late April - mid July.


Causative organism known: Yes
Causative Species/Genus: Alexandrium sp. ( 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 Not known.
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Mussels Saxitoxins STX eq 1,490 g/100g Bioassay-Mouse
Kit used: Type of kit used:
Additional information: PSP toxins detected in bivalve molluscs and crustaceans. Maximum toxin level found in mussels was 7,447 MU in (1,490 g/100 g tissue) in mussels from the Firth of Forth, in May.
Economic losses:
Management decision: Warning notices posted along coast from Scottish border to Buckie. Firth of Forth closed for 3 - 4 weeks in May.
Additional harmful effect information: PSP closures also enforced in N E England e.g. the Farne Islands (for Pecten maximus), Staithes and Craster (Mytilus Edulis)
Updated at 03:24 on 8 Apr 2018