General Information

Event name: CA-08-062
Country: CANADA
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 20.6ug Domoic acid/g-289.0ug Domoic acid/g)
Associated syndrome: ASP
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 (Presence of ASP toxins in the Gulf of St. Lawrence since 1998)
Individuals to contact: SAUVÉ, Gilbert , STARR, Michel , Lessard, Sylvie

Location & Date

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Location: Latitude: 51.024444, Longitude: -58.586667
General location information: North coast Mecantina Trough, Quebec Region
HAB Area code(s): CA-01
Additional location information: Q-6; 200 km vicinity of Tete-a-la-Baleine
Bloom event dates (yyyy/mm/dd): Event Date:2008-07-27
Quarantine levels dates (yyyy/mm/dd): First detection: 2008-07-22, End: 2008-09-21
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Pseudo-nitzschia seriata (5600 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: There maybe some other species that may contribute to explain the presence of domoic acid. However, there is no taxonomic observation supporting this possibility at our HAMP stations. The most atypical observation for 2008 is the unusual abundances of Pseudo-nitzschia pungens at our stations(Max: 343 501 cells/L at Q-9 in mid-Oct). However, this species wasn't observed in two sectors (Q-11 and Q-12)
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. 3.0 Max. 4.0 Salinity: Current Velocity:
Nutrient information: NITRATE: Min. 0.18 Max. 1.31
PHOSPHATE: Min. 0.14 Max. 0.40
SILICATE: Min. 3.68 Max. 13.29
Temperature Range During Event: Max: 17 °C, Min: 9 °C
Salinity Range During Event: Max: 31.1, Min: 29.5
Bloom location in the water column:
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 06:49 on 18 Sep 2013