General Information

Event name: CA-00-008
Country: CANADA
Nature of the harmful event:
High Phyto concentration , Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 33 g DA / g wet weight (33 ppm).)
Associated syndrome: ASP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (Canadian Shellfish Sanitation Program of the Canadian Food Inspection Agency)
Event occurred before in this location: No
Individuals to contact: BATES, Stephen S. , RICHARD, Don J.A.

Location & Date

[View larger map]
Location: Latitude: 46.750000, Longitude: -64.133056
General location information: Western Prince Edward Island, Gulf Region
HAB Area code(s): CA-25
Additional location information: Mill River. Initial and final event dates are approximate, because the first phytoplankton sample was collected on 23/09/00, while domoic acid in the mussels was first detected on 19/09/00. A water sample collected on 03/10/00 revealed only a trace of Pseuod-nitzschia spp. The affected area has no molluscan shellfish aquaculture; most harvesting is of wild shellfish populations. Because of this, the location is not included in the aquaculture phytoplankton sampling program operated by the Prince Edward Island Department of Fisheries, Aquaculture and Environment.
Bloom event dates (yyyy/mm/dd): Event Date:2000-09-19
Start: 2000-09-23, End: 2000-10-03
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Pseudo-nitzschia multiseries (220,000 cells/L)
Species identification confirmed by scanning electron microscopy.
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: The Pseudo-nitzschia multiseries cells in the 22/09/00 sample looked in poor physiological condition, suggesting that only the tail end of a short bloom was observed. Only trace levels of domoic acid were detected in mussels on 26/09/00. A rainy summer,
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:
In situ
Growth Comments
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Crassostrea virginica Domoic Acid DA trace LC
Mytilus edulis Domoic Acid DA eq 33 ppm LC
Kit used: Type of kit used:
Additional information: HPLC-DAD.
Economic losses:
Management decision: Shellfish harvesting closed on 22/09/00. Re-opened on 03/10/00.
Additional harmful effect information: AOAC Official Method 991.26, Domoic Acid in Mussels. Liquid Chromatographic Method.
Updated at 06:19 on 25 Sep 2013