General Information

Event name: CA-92-002
Country: CANADA
Nature of the harmful event:
High Phyto concentration
Event directly affected:
Toxicity detected: Yes (Approximate range: DA but below closure levels.)
Associated syndrome: ASP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes
Event occurred before in this location: Yes (Areas were closed to harvesting during 1988 due to unacceptable levels of domoic acid. Although closures are not an annual occurrence in the Bay of Fundy, detectable levels of domoic acid are measured in plankton tows during summer months. Pseudonitzschia pseudodelicatissima is obserbed annually in the region - but at significantly lower levels than those observed during 1988.)
Individuals to contact: MARTIN, Jennifer

Location & Date

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Location: Latitude: , Longitude:
General location information: Northwestern Bay of Fundy., Scotia Fundy Region
HAB Area code(s): CA-22
Additional location information:
Bloom event dates (yyyy/mm/dd): Event Date:1992-05-19
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: No shellfish harvesting areas were closed due to unacceptable levels of domoic acid in the Bay of Fundy during 1992.


Causative organism known: Yes
Causative Species/Genus: Pseudo-nitzschia pseudodelicatissima (10,400 cells/L)
On May 19 at Deadmans Harbour.
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: Pseudo-nitzschia (previously known as Nitzschia) pseudodelicatissima.
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: 32 Current Velocity: 0
Nutrient information:
Temperature Range During Event: Max: 12 °C, Min: 5 °C
Salinity Range During Event:
Bloom location in the water column:
Growth: Advected
In situ
Growth Comments Both.
Additional Environmental information: Water column mixed inshore stratified offshore.

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: Type of kit used:
Additional information: Extractions for domoic acid were done at the Department of Fisheries and Oceans Inspection Laboratory in Black's Harbour, New Brunswick, and HPLC analyses were carried out at the Inspection Branch Laboratory in Halifax, Nova Scotia.
Economic losses:
Management decision: None required.
Additional harmful effect information:
Updated at 08:18 on 25 Sep 2013