General Information

Event name: CA-15-001
Country: CANADA
Nature of the harmful event:
High Phyto concentration
Event directly affected:
Toxicity detected: Yes (Approximate range: 75 ug/g)
Associated syndrome: ASP
Unexplained toxicity:
Species implicated in toxin transmission (transvector): toxin data from CFIA
Report the outcome of a monitoring programme: Yes (Harmful Algae Monitoring Program)
Event occurred before in this location: Yes (Higher than usual levels and more widespread)
Individuals to contact: HAIGH, Nicky

Location & Date

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Location: Latitude: , Longitude:
General location information: West Vancouver Island, West Coast Canada
HAB Area code(s): CA-35
Additional location information:
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd): First detection: 2015-04-29,
Additional date-related information: Bloom had two peaks - May-June and August


Causative organism known: Yes
Causative Species/Genus: Pseudo-nitzschia sp. (unknown cells/L)
ID of P. australis being causative species for DA toxin was not able to be confirmed. Several different Pseudo-nitzschia species observed
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: The bloom continued and expanded along the entire coastline, appearing to peak around June 17, 2015. The entire west coast was closed throughout June. Levels were decreasing by June 29th. Domoic acid levels in mussels were 10X less than those reported in the US in razor clams probably due to the rapid depuration rates in mussels compared to razor clams which are the standard test organisms for CFIA in Canada.
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: 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:

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:
Created at 07:13 on 10 Jun 2016
Updated at 09:24 on 21 Sep 2018