General Information

Event name: CA-16-001
Country: CANADA
Nature of the harmful event:
Water Discoloration , High Phyto concentration , 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:
Individuals to contact: HAIGH, Nicky

Location & Date

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Location: Latitude: 49.329167, Longitude: -126.079167
General location information: Clayoquot Sound, West Coast Canada
HAB Area code(s): CA-36
Additional location information:
Bloom event dates (yyyy/mm/dd): Event Date:2016-05-13
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: bloom lasted approximately 4 weeks


Causative organism known: Yes
Causative Species/Genus: Chrysochromulina sp. (~6000000 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: Coccolithophorid sp was co-occuring dominant species. Large coccolithophorid bloom was seen offshore Vancouver Island and in some inlets (May to July). Only mortalities reported were farmed fish from some sites in central to northern Clayoquot Sound, where Chrysochromulina species co-occurred with coccolithophorids.
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 02:30 on 13 Apr 2017
Updated at 03:26 on 16 Feb 2018