General Information

Event name: CA-02-008
Country: CANADA
Nature of the harmful event:
High Phyto concentration , 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)
Event occurred before in this location: No
Individuals to contact: WHYTE, Ian

Location & Date

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Location: Latitude: 50.316667, Longitude: -125.016667
General location information: Upper Strait of Georgis, Pacific Region
HAB Area code(s): CA-38
Additional location information: Fairly widespread bloom in area between E Quadra Island and Toba Inlet.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Bloom lasted Aug 8 - 26 approximately


Causative organism known: Yes
Causative Species/Genus: Chaetoceros convolutus (180,000 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: Mortality occurred when fish were fed with Ch. convolutus at ~80,000 cells/L.
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: Yes Oxygen content (nL/L): Wind velocity:
Temperature (°C): 12.7@1m, 9.8 @1 Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: 20@1m, 32@ Current Velocity: 0
Nutrient information:
Temperature Range During Event: Max: 17 °C, Min: 9 °C
Salinity Range During Event: Max: 32, Min: 20
Bloom location in the water column: Whole column
In situ
Growth Comments
Additional Environmental information: bloom seemed to have been catalysed by lowering of temperature at 5m and 10m ~4C from previous week

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: some mortality seen; mechanically harmful species
Updated at 03:07 on 16 Feb 2018