General Information

Event name: CA-90-009
Country: CANADA
Nature of the harmful event:
Seafood toxins
Event directly affected:
Shellfish
Toxicity detected: No
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 (First recorded in autumn 1987, and has recurred during the autumns of 1988 and 1989, but to a lesser degree each year.)
Individuals to contact: SMITH, John C.

Location & Date

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Location: Latitude: , Longitude:
General location information: Eastern Prince Edward Island, Gulf Region
HAB Area code(s): CA-24
Additional location information: Cardigan Bay
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Mid-October- late November

Microalgae

Causative organism known: Yes
Causative Species/Genus: Nitzschia pungens (700,000 cells/L)
In early November (Brudewell River).
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: 0
Nutrient information:
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event: Max: 31, Min: 27
Bloom location in the water column:
Growth:
Growth Comments Most probably, the population originated within the estuaryies, as no N. pungens cells were found more than one km offshore of the mouth of Cardigan Bay.
Additional Environmental information: Temperature range during the bloom period: 15 C in October to 4 C in November.

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: None
Additional harmful effect information: The domoic acid levels in shellfish never exceeded the 20 g/g limit, and for the first autumn since 1987, no estuaries were closed to mussel harvesting.
Updated at 05:56 on 17 Sep 2018
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