General Information

Event name: CA-12-011
Country: CANADA
Nature of the harmful event:
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: No
Individuals to contact: HAIGH, Nicky

Location & Date

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Location: Latitude: , Longitude:
General location information: Quatsino Sound, West Coast Canada
HAB Area code(s): CA-35
Additional location information:
Bloom event dates (yyyy/mm/dd): Start: 2012-09-23,
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: fish- killing bloom lasted approx. 20 hours


Causative organism known: Yes
Causative Species/Genus: Chattonella marina (250 000 cells/L)
as Chattonella cf marina
Co-Ocurring Species/Genus: Chattonella verruculosa (50 000 cells/L)
as Pseudochattonella cf verruculosa
Chlorophyll concentration, if known: µg/l
Additional bloom information: Very low levels of Heterosigma akashiwo and Dictyocha spp were also observed during mortaliy event.
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 06:27 on 18 Mar 2013
Updated at 01:25 on 16 Feb 2018