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General Information

Event name: CA-11-017
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: 49.320000, Longitude: -126.049722
General location information: Lower West coast of Vancouver Island, Pacific Region
HAB Area code(s): CA-36
Additional location information: Clayoquot Sound
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd): First detection: 2011-09-12,
Additional date-related information: bloom lasted ~2 weeks

Microalgae

Causative organism known: Yes
Causative Species/Genus: Heterosigma akashiwo (300 000 cells/L)
Co-Ocurring Species/Genus: Chattonella verruculosa (30 000 cells/L)
Chlorophyll concentration, if known: µg/l
Additional bloom information: Also Chattonella sp.(Raphidophyceae) ~10,000/L; it's impossible to say if one of the three species was responsible for the mortality seen, or if it was a combination of the three - a "toxic cocktail"
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:
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 01:33 on 16 Feb 2018
IOC/UNESCO ISSHA
IOC/UNESCO ICES PICES