Harmful Algal Information System: Event CA-87-004

General Information

Event name:	CA-87-004
Country:	CANADA
Nature of the harmful event:	Seafood toxins
Event directly affected:
Toxicity detected:	Yes
Associated syndrome:	PSP
Unexplained toxicity:	No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme:	Yes
Event occurred before in this location:	Yes (Yearly.)
Individuals to contact:	MARTIN, Jennifer

Location & Date

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Location:	Latitude: , Longitude:
General location information:	Northwestern Bay of Fundy, Scotia Fundy HAB Area code(s): CA-22
Additional location information:
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:	Late July-Early September.

Microalgae

Causative organism known:	Yes
Causative Species/Genus:	Gonyaulax excavata (12,000 cells/L) Determined by surface water sample preserved in 2.5% formalin acetic acid and counted with inverted microscope.
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known:	µg/l
Additional bloom information:	Gonyaulax excavata (= G.tamarensis).
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):	Salinity:	32	Current Velocity:	0

Nutrient information:

Temperature Range During Event:

Max: 12 °C, Min: 9 °C

Salinity Range During Event:

Bloom location in the water column:

Growth:

Advected

Growth Comments

Advected populations from well mixed offshore populations of Gonyaulax excavata.

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:

Affected areas closed to harvesting of shellfish.

Additional harmful effect information:

Marine organisms (mussels, softshell clams, scallops) accumulating PSP toxins. PSP extractions conducted at Black's Harbour, New Brunswick, Department of Fisheries and Oceans Laboratory. No discolouration of water.

Updated at 08:14 on 25 Sep 2013