General Information

Event name: US-90-020
Nature of the harmful event:
High Phyto concentration
Event directly affected:
Toxicity detected: No
Associated syndrome:
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes
Event occurred before in this location: No
Individuals to contact: HORNER, Rita

Location & Date

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Location: Latitude: , Longitude:
General location information: Vancouver Island, B.C., throughout San Juan I, Washington.
HAB Area code(s): US-24
Additional location information: Pacific coast of Washington, Vancouver Island, B.C., throughout San Juan Islands.
Bloom event dates (yyyy/mm/dd): Start: 1990-08-15, End: 1990-08-31
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Mid to end of August.


Causative organism known: Yes
Causative Species/Genus: Gonyaulax spinifera (1,500,000 cells/L)
in patches, formed cysts.
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography:

Environmental Conditions

Weather: Calm, clear weather. Turbidity (NTU): Wind direction:
Stratified water: No Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity: 0
Nutrient information:
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column:
Growth: Advected
In situ
Growth Comments Probably both; occurred as huge, reddish brown patches that moved with tides, currents.
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: No Type of kit used:
Additional information:
Economic losses:
Management decision:
Additional harmful effect information: No harmful effects reported; fish growers worried about effect on net-pen fish.