General Information

Event name: CA-05-042
Country: CANADA
Nature of the harmful event:
High Phyto concentration , Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 86-459ug/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 , SAUVÉ, Gilbert , STARR, Michel

Location & Date

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Location: Latitude: 48.183056, Longitude:
General location information: Lower St. Lawrence Estuary, Quebec Region
HAB Area code(s): CA-06
Additional location information: Q-1; 100 km vicinity of Tadoussac; natural mussel harvesting area
Bloom event dates (yyyy/mm/dd): Event Date:2005-08-28
Start: 2005-06-19, End: 2005-09-10
Quarantine levels dates (yyyy/mm/dd): First detection: 2005-06-19, End: 2005-10-15
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Alexandrium tamarense (1440 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): Oxygen saturation %: Current Direction:
Sechhi disk (m): Min. 3.6 Max. 6.5 Salinity: Current Velocity:
Nutrient information: NITRATE: Min. 2.0 Max. 12.7
PHOSPHATE: Min. 0.3 Max. 1.2
SILICATE: Min. 6.3 Max. 23.6
Temperature Range During Event: Max: 9 °C, Min: 3 °C
Salinity Range During Event: Max: 30.2, Min: 19.4
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: found in Mytilus edulis
Updated at 06:09 on 18 Sep 2013