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.


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