General Information

Event name: CA-90-007
Country: CANADA
Nature of the harmful event:
High Phyto concentration
Event directly affected:
Toxicity detected: No
Associated syndrome: DSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes
Event occurred before in this location: Yes (Blooms of Dinophysis spp are an annual summer event in these waters although no toxic episodes have ever been associtiated with their occurrence.)
Individuals to contact: CEMBELLA, Allan

Location & Date

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Location: Latitude: , Longitude:
General location information: South coast St. Lawrence estuary, Quebec Region
HAB Area code(s): CA-07
Additional location information: Lower northern and southern shore of the St. Lawrence estuary. Northern and southwestern Gulf of St. Lawrence.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Mid-June - early July


Causative organism known: Yes
Causative Species/Genus: Dinophysis norvegica ( cells/L)
Dinophysis acuminata (15,000 cells/L)
dominant dinophysoid specie
Dinophysis rotundata ( 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: 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: 20 °C, Min: 1 °C
Salinity Range During Event: Max: 31, Min: 16
Bloom location in the water column:
Growth: Advected
Growth Comments Based on information regarding the prevailing residual Gaspñe current, it is probable that the Dinophysis acumianta bloom was transported into the Bay of Gaspé from the exterior.
Additional Environmental information: Temperature range: 1-20º C (10-16º C during the bloom) Salinity range: 16-31‰ (23-28‰ during the bloom)

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: No action taken
Additional harmful effect information: None observed
Updated at 08:48 on 25 Sep 2013