General Information

Event name: CA-88-001
Country: CANADA
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 530 gr / 100 g STX eq)
Associated syndrome: PSP
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: No
Event occurred before in this location: Yes (Annually)
Individuals to contact: MARTIN, Jennifer

Location & Date

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Location: Latitude: , Longitude:
General location information: Southwestern Bay of Fundy, Scotia Fundy Region
HAB Area code(s): CA-22
Additional location information:
Bloom event dates (yyyy/mm/dd): Start: 1988-05-27,
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: June through September. Highest shellfish toxicity levels of 530 gr / 100 g STX eq. reached at Crow Harbour on July 25.


Causative organism known: Yes
Causative Species/Genus: Gonyaulax excavata (Braarud) Balech 1971 (160 cells/L)
First occurence on May 27.
Gonyaulax excavata (Braarud) Balech 1971 (8.0 x 10(3) cells/L)
July 12. Maximum concentration of cells observed.
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: Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity:
Nutrient information:
Temperature Range During Event: Max: 12 °C, Min: 10 °C
Salinity Range During Event: Max: 32, Min: 31
Bloom location in the water column: Whole 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: Harversting of shellfish prohibited at toxin levels greater than 80 g/100 g STX eq.
Additional harmful effect information: Marine organism (mussels, softshell clam, scallops) accumulating the PSP toxins. No water discoloration observed. No human illnesses reported.
Updated at 06:42 on 25 Sep 2013