General Information

Event name: CA-00-005
Country: CANADA
Nature of the harmful event:
Mass mortalities
Event directly affected:
Aquaculture Fish
Toxicity detected: No
Associated syndrome: OTHER
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (Harmful Algae Monitoring Program, Nanaimo, BC, Canada.)
Event occurred before in this location: Yes
Individuals to contact: HAIGH, Nicky

Location & Date

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Location: Latitude: 49.336667, Longitude: -125.950000
General location information: Lower West coast of Vancouver Island, Pacific Region
HAB Area code(s): CA-36
Additional location information: Herbert Inlet, Clayoquot Sound. Heterosigma akashiwo bloom mostly limited to Herbert Inlet and close environs
Bloom event dates (yyyy/mm/dd): Start: 2000-07-31, End: 2000-09-25
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Fish kill occurred in week of Sept 18- 25.


Causative organism known: Yes
Causative Species/Genus: Heterosigma akashiwo ( cells/L)
Maximum cell counts 1,200,000 cells/L at nearby monitoring site.
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: Bloom had two peaks, in late July- early August (no mortality) and mid-September (mortality).
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
Additional Environmental information:

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 03:15 on 16 Feb 2018