General Information

Event name: CA-95-002
Country: CANADA
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 460 g DA / 100 g.)
Associated syndrome:
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes
Event occurred before in this location: Yes (Domoic acid was first detected during 1987 in the Gulf of St. Lawrence and domoic acid has been detected most years since.)
Individuals to contact: AERSENAULT, Edmond

Location & Date

[View larger map]
Location: Latitude: , Longitude:
General location information: South coast St. Lawrence Estuary, Quebec Region
HAB Area code(s): CA-07
Additional location information:
Bloom event dates (yyyy/mm/dd): Event Date:1995-10-18
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: October.


Causative organism known: Yes
Causative Species/Genus: Pseudo-nitzschia multiseries (438,000 cells/L)
New London Bay, October 18.
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: Cells were observed through the Gulf of St. Lawrence also
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: Current Velocity: 0
Nutrient information:
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column:
Growth: Advected
In situ
Growth Comments In situ as well as advected.
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Mytilus edulis (October 18, New London Bay) Domoic Acid DA eq 460 Bioassay-Mouse
Kit used: Type of kit used:
Additional information:
Economic losses:
Management decision: No toxins in shellfish exceeded the regulatory limit of 20 g/g. Therefore there were non closures dure to domoic acid.
Additional harmful effect information:
Updated at 05:36 on 17 Sep 2018