General Information

Event name: CA-11-015
Country: CANADA
Nature of the harmful event:
Water Discoloration , High Phyto concentration
Event directly affected:
Toxicity detected: No
Associated syndrome:
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (Harmful Algae Monitoring Program)
Event occurred before in this location: Yes
Individuals to contact: HAIGH, Nicky

Location & Date

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Location: Latitude: 50.180000, Longitude: -125.150000
General location information: Upper Strait of Georgia, Pacific Region
HAB Area code(s): CA-38
Additional location information: East Quadra Island; bloom was also seen at Raza Island; Conville Bay
Bloom event dates (yyyy/mm/dd): Event Date:2011-06-22
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Bloom was seen the last two weeks of June, the last two weeks of July , and the last two weeks of August. The highest concentrations were seen in the first peak of Heterosigma.


Causative organism known: Yes
Causative Species/Genus: Heterosigma akashiwo (8 600 000 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: This bloom was closely associated with 11-01 in the southern Strait of Georgia
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: Oxygen content (nL/L): 10.7@1m, 11.2@5m, 11.0@10m Wind velocity:
Temperature (°C): 17.1@1m,16.8@5m, 16.4@10m Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: 29@1m,30@5m, 30@10m Current Velocity:
Nutrient information:
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column:
Growth Comments
Additional Environmental information: Conville Bay, June 22 2011

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:
Additional harmful effect information:
Updated at 04:44 on 19 Sep 2013