General Information

Event name: GB-96-005
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 771 g / 100 g)
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 occured on the west coast since 1990.)
Individuals to contact: HOWARD, Godfrey , MACDONALD, Elspeth

Location & Date

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Location: Latitude: , Longitude:
General location information: West coast of Scotland., Scotland.
HAB Area code(s): GB-17 GB-19
Additional location information:
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Late April - late July.


Causative organism known: Yes
Causative Species/Genus: Alexandrium sp. (< 500 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: Alexandrium found sporadically over the west coast from March to September up to 1600 cells/L, but mostly <500 cells/L.
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
Mytilus edulis Saxitoxins STX eq 771 Bioassay-Mouse
Kit used: Type of kit used:
Additional information: PSP - detected sporadically in mussels from NW coast, peaked in late July (771 g/100 g), but mostly <200 g/100 g. On central west coast, levels reached 118 g/100g on 07/07/96.
Economic losses:
Management decision: Voluntary Closure Agreement (VCA) agreed for NW coast and central west coast as required in collaboration with shellfish farmers and Environmental Health Officers.
Additional harmful effect information:
Updated at 09:24 on 9 Oct 2020