General Information

Event name: CA-00-007
Country: CANADA
Nature of the harmful event:
High Phyto concentration , Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 580 g STXeq / 100 g)
Associated syndrome: PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (Harmful Algae Monitoring Program, Nanaimo, BC, Canada.)
Event occurred before in this location: No
Individuals to contact: HAIGH, Nicky

Location & Date

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Location: Latitude: 49.353056, Longitude: -125.780000
General location information: Lower West coast of Vancouver Island, Pacific Region
HAB Area code(s): CA-36
Additional location information: Bedwell Sound, Clayoquot Sound. Bloom also detected in Herbert Inlet, Clayoquot Sound. Plankton monitoring site is at head of Bedwell Soun; toxin data is for Saranac Island, near mouth of Bedwell Sound.
Bloom event dates (yyyy/mm/dd): Start: 2000-09-17,
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Alexandrium catenella (260,000 cells/L)
Co-Ocurring Species/Genus: Cochlodinium polykrikoides (6,300,000 cells/L)
Chlorophyll concentration, if known: µg/l
Additional bloom information: Cochlodinium polykrikoides bloom was mostly in Bedwell Sound and environs. Alexandrium catenella was associated with Cochlodinium bloom.
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: Yes Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity: 0
Nutrient information: NITRATE: 0; 1.68 ; 9.48 M/L
PHOSPHATE: 0.91; 0.74; 1.24 M/L
SILICATE: 7.89; 28.75; 34.04 M/L
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column:
Growth Comments
Additional Environmental information: Information correspond to: 49 21.,1 N, 125 46.8 W 17/9/00 Temp (C): 15.9 (1m) ; 13.4 (5m and 10m). Oxygen: 9.9 (1m); 3.5 (5m and 10m). Salinity:25 (1m); 32 (5m and 10m). Nutrient info at 1m; 5m and 10m.

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Mussel Saxitoxins STX eq 580 Bioassay-Mouse
Kit used: Type of kit used:
Additional information: Mouse bioassay done by Canadian Food Inspection Agency.
Economic losses:
Management decision:
Additional harmful effect information:
Updated at 02:32 on 26 Sep 2013