General Information

Event name: CA-08-072
Country: CANADA
Nature of the harmful event:
High Phyto concentration , Mass mortalities
Event directly affected:
Natural Fish , 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: 50.469444, Longitude: -127.879444
General location information: Upper West coast of Vancouver Island, Pacific Region
HAB Area code(s): CA-35
Additional location information: Quatsino sound; Bloom affected two farm sites
Bloom event dates (yyyy/mm/dd): Event Date:2008-09-14
Quarantine levels dates (yyyy/mm/dd): First detection: 2008-09-13,
Additional date-related information: Mortalities occurred for about 3 days only, then cell counts reduced


Causative organism known: Yes
Causative Species/Genus:
Co-Ocurring Species/Genus: Heterosigma akashiwo (100,00 cells/L)
Heterosigma levels were too low to affect the fish
Chlorophyll concentration, if known: µg/l
Additional bloom information: High morality levels of farmed salmon due to Pseudochattonella bloom. wild coho salmon were also see to die in area very close to one of the affected farm sites.
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: Oxygen content (nL/L): 5.8mg/L-8.7 mg/L Wind velocity:
Temperature (°C): 10.5- 11.9 Oxygen saturation %: Current Direction:
Sechhi disk (m): ~5 Salinity: 31-32 Current Velocity:
Nutrient information:
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column: Whole column
Growth Comments
Additional Environmental information: Monday Rocks farm site; September 14, 2008

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 01:50 on 16 Feb 2018