General Information

Event name: CA-88-002
Country: CANADA
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 74 g/g)
Associated syndrome: ASP
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: No
Event occurred before in this location: Yes (Although N. delicatissima has been observed for a number of years, 1988 was the first year domoic acid levels were measured in bivalves.)
Individuals to contact: MARTIN, Jennifer

Location & Date

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Location: Latitude: , Longitude:
General location information: Southwestern 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 August to early October.


Causative organism known: Yes
Causative Species/Genus: Nitzschia delicatissima Cleve 1897 (6 x 10(3) cells/L)
Maximum number of cells, Sept 23.
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: 13 °C, Min: 11 °C
Salinity Range During Event: Max: 32, Min: 31
Bloom location in the water column: Whole column
Growth Comments Probably in situ growth - Further research is required.
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: sites closed in 1988 see CA-90-001
Additional harmful effect information: Softshell clams and blue mussels accumulated domoic acid. Highest levels ware at the Bar Road in Mussels harvested September 22: 74 g/g.
Updated at 06:09 on 17 Sep 2018