General Information

Event name: CA-06-005
Country: CANADA
Nature of the harmful event:
Water Discoloration , High Phyto concentration , Mass mortalities
Event directly affected:
Aquaculture Fish
Toxicity detected: No
Associated syndrome: OTHER
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 (Heterosigma blooms are infrequent in this inlet and rarely cause mortlities)
Individuals to contact: HAIGH, Nicky

Location & Date

[View larger map]
Location: Latitude: 49.149722, Longitude: -125.799722
General location information: Lower West coast of Vancouver Island, West Coast Canada
HAB Area code(s): CA-36
Additional location information: Tofino Inlet
Bloom event dates (yyyy/mm/dd): Event Date:2006-08-23
Quarantine levels dates (yyyy/mm/dd): First detection: 2006-08-23,
Additional date-related information: Bloom lasted ~ 2 weeks


Causative organism known: Yes
Causative Species/Genus: Heterosigma akashiwo (17,000,000 cells/L)
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: Oxygen content (nL/L): 9.7mg/L@0m, 11.4mg/L@3m, 8.2mg/L@6m, 6.7mg/L@12m Wind velocity:
Temperature (°C): 17.2@0m, 15@3m, 14@6m, 13.8@12m Oxygen saturation %: Current Direction:
Sechhi disk (m): 4.0 Salinity: 27@0m, 27@3m, 28@6m, 28@12m Current Velocity:
Nutrient information:
Temperature Range During Event: Max: 18 °C, Min: 13.8 °C
Salinity Range During Event: Max: 30, Min: 17
Bloom location in the water column:
Growth Comments
Additional Environmental information: Eagle Bay August 23,2006

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 02:31 on 16 Feb 2018