General Information

Event name: IE-87-003
Country: IRELAND
Nature of the harmful event:
Mass mortalities
Event directly affected:
Aquaculture Fish
Toxicity detected: No
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: Yes (Mortalities due to this species occurred in 1985 and 1986 despite relocation of cages.)
Individuals to contact: CLARKE, Dave

Location & Date

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Location: Latitude: , Longitude:
General location information: Ardbear Bay near Clifden Co. Galway., Galway.
HAB Area code(s): IE-06
Additional location information:
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: June - November.


Causative organism known: No
Causative Species/Genus:
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: Flagellate 'X' sensu Droop (max 4,500,000 cells/L). See complementary 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 Source of seed population in tidal lake where mussel culture being undertaken. Bloom appears to initiate there and is carried by ebbing tides to cage site which is beyond a sand bar but still within a deep hole in an otherwise shallow area.
Additional Environmental information: Temperature 14 C at surface, 10 C at 10m depth. Secchi 2.5 m at cages 4.0 m in exposed part of Bay. Colour: greenish

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: Early slaughter commenced 21 September. Site abandoned for 1988 for May - October.
Additional harmful effect information:
Updated at 03:13 on 24 Apr 2018
Checked at 04:32 on 22 Apr 2013