General Information

Event name: GB-96-002
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 976 g STXeq /100 g.)
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: Yes (PSP has recurred on the Scottish east coast since 1990, although in different locations. DSP has not previously been detected in this region.)
Individuals to contact: HOWARD, Godfrey , MACDONALD, Elspeth

Location & Date

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Location: Latitude: , Longitude:
General location information: Dornoch Firth., Scotland. North East Coast.
HAB Area code(s): GB-22
Additional location information:
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Late April - early July.


Causative organism known: Yes
Causative Species/Genus: Dinophysis spp. (2,500 cells/L)
from May to September
Alexandrium spp. (up to 1,10 cells/L)
from May to July
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
Scallop (April to June) Saxitoxins STX eq 232 Bioassay-Mouse
Mussel (May 13th) Saxitoxins STX eq 976 Bioassay-Mouse
July Okadaic Acid Positive Bioassay-Mouse
Kit used: No Type of kit used:
Additional information:
Economic losses:
Management decision: Voluntary Closure Agreements (VCA) of mussel beds for PSP from May to early July and during July for DSP in Dornoch Firth.
Additional harmful effect information: PSP in mussels in Dornotch Firth, maximum level 976 g/100 g on May 13. Declined in June and not detected by early July. DSP detected in same area during July. PSP toxins in offshore scallops to maximal level of 232 g/100 g from April to July.
Updated at 11:04 on 14 Sep 2016