General Information

Event name: CA-04-033
Country: CANADA
Nature of the harmful event:
High Phyto concentration , Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 1632ug/100g)
Associated syndrome: PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (Monitoring Program of Toxic and Harmful Algae)
Event occurred before in this location: Yes (PSP toxins recurrently accumulate year after year in the Estuary and Gulf of St. Lawrence)
Individuals to contact: BONNEAU, Esther

Location & Date

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Location: Latitude: 49.256389, Longitude: -65.528889
General location information: St. Lawrence River, Quebec Region
HAB Area code(s): CA-08
Additional location information: 200 km vicinity of Mont-Louis; natural mussel harvesting area
Bloom event dates (yyyy/mm/dd): Event Date:2004-07-04
Quarantine levels dates (yyyy/mm/dd): First detection: 2004-06-27, End: 2004-10-10
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Alexandrium tamarense (45 6625 cells/L)
Co-Ocurring Species/Genus:
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): 13 Oxygen saturation %: Current Direction:
Sechhi disk (m): 5.1 Salinity: 24.3 Current Velocity:
Nutrient information:
Temperature Range During Event: Max: 15 °C, Min: 13.5 °C
Salinity Range During Event: Max: 25.7, Min: 21.4
Bloom location in the water column:
In situ
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 02:08 on 7 Aug 2013