General Information

Event name: GB-92-001
Nature of the harmful event:
Water Discoloration , High Phyto concentration
Event directly affected:
Toxicity detected: Yes
Associated syndrome:
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes
Event occurred before in this location: No
Individuals to contact: MACDONALD, Elspeth

Location & Date

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Location: Latitude: , Longitude:
General location information: Loch Long., West coast of Scotland.
HAB Area code(s): GB-15
Additional location information:
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Late July.


Causative organism known: Yes
Causative Species/Genus: Dinophysis norvegica ( cells/L)
Dinophysis acuta ( cells/L)
Dinophysis rotundata ( cells/L)
Dinophysis acuminata (8,000 - 94 cells/L)
Dominant species
Co-Ocurring Species/Genus: Ceratium spp. ( cells/L)
Alexandrium spp. (1,000 cells/L)
Found in Portincaple
Scrippsiella trochoidea (0 cells/L)
Chlorophyll concentration, if known: µg/l
Additional bloom information: Cell counts of D. acuminata ranged from 8,000 cells/L at Portincaple to 946,000 cells/L at Finnart.
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, but there are no previous records of such an incident.
Additional Environmental information: No detailed information available.

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: Type of kit used:
Additional information:
Economic losses:
Management decision: No closures were required as there was no shellfish harvesting in the affected area.
Additional harmful effect information: Red/brown water discoloration reported on 31 July 1992, extending over a 10 km area along the eastern shore of Loch Long. Found to be a dense bloom of Dinophysis spp, especially D. acuminata. Water and shellfish samples were collected. Shellfish tissue te
Updated at 01:33 on 8 Apr 2018