General Information

Event name: CA-03-011
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: 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: Yes (Dyctiocha blooms seen before with lower cells counts and no mortalities.)
Individuals to contact: WHYTE, Ian

Location & Date

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Location: Latitude: 49.116667, Longitude: -125.716667
General location information: Lower West coast of Vancouver Island, Pacific Region
HAB Area code(s): CA-36
Additional location information: Tofino Inlet; bloom was not very extensive
Bloom event dates (yyyy/mm/dd): Event Date:2003-09-18
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Significant concentrations of Dictyocha first seen Sept 5th, bloom Sept 18-22, mortalities Sept 18th.


Causative organism known: Yes
Causative Species/Genus: Dictyocha fibula (1,500,000 cells/L)
most cells with skeleton, or intermediate skeletal to non-skeletal form, few completely without skeleton
Co-Ocurring Species/Genus: Dictyocha speculum ( cells/L)
Cells/L Unknown
Chlorophyll concentration, if known: µg/l
Additional bloom information: Maximum cell counts usually seen between 3m and 5m depth.
Event-related bibliography:

Environmental Conditions

Weather: a few showers/sunny Turbidity (NTU): Wind direction:
Stratified water: Yes Oxygen content (nL/L): 7.9 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: Advected
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 04:24 on 22 Jul 2013
Updated at 03:02 on 16 Feb 2018