Harmful Algal Information System: Event CA-90-007

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

Microalgae

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 Gasp�e current, it is probable that the Dinophysis acumianta bloom was transported into the Bay of Gasp� from the exterior.

Additional Environmental information:

Temperature range: 1-20� C (10-16� C during the bloom) Salinity range: 16-31� (23-28� during the bloom)