General Information

Event name: CA-07-002
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: Yes (Chrysochronulina species and Dictyocha species were implicated in mortalities in this area in June 2005 and May 2006)
Individuals to contact: HAIGH, Nicky

Location & Date

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Location: Latitude: 50.469722, Longitude: -127.879722
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):
Quarantine levels dates (yyyy/mm/dd): First detection: 2007-05-07, End: 2007-05-30
Additional date-related information: Mortalities occurred around May 20th


Causative organism known: Yes
Causative Species/Genus: Chrysochromulina sp. (~500,000 cells/L)
appears to have been a combined toxicity effect with Dictyocha speculum
Co-Ocurring Species/Genus: Dictyocha speculum (650,000 cells/L)
cells were 6-spine skeletal form
Chlorophyll concentration, if known: µg/l
Additional bloom information:
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:
Updated at 02:04 on 16 Feb 2018