| Event name: | CA-91-006 | |
| Country: | CANADA | |
|
Nature of the harmful event: |
Seafood toxins | |
|
Event directly affected: |
||
| Toxicity detected: | Yes (Approximate range: 18 µg/g DA.) | |
| 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 (Low numbers of Nitzschia pungens but no domoic acid had previously been detected in Malpeque Bay, but this is the first year that the bay was closed to harvesting due to domoic acid contamination.) | |
| Individuals to contact: | SMITH, John C. | |
| Location: | Latitude: , Longitude: | |
| General location information: |
Western Prince Edward Island, Gulf Region HAB Area code(s): CA-25 |
|
| Additional location information: | Malpeque and Cascumpec Bays | |
| Bloom event dates (yyyy/mm/dd): |
Event Date:1991-10-31 |
|
| Quarantine levels dates (yyyy/mm/dd): | ||
| Additional date-related information: | Late October-early November. | |
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Nitzschia pungens f. multiseries
(15,400 - 3 cells/L)
Depending on the station in Lennox Channel, on October 31. |
|
| Co-Ocurring Species/Genus: | ||
| Chlorophyll concentration, if known: | µg/l | |
| Additional bloom information: | Cell numbers thereafter dropped to undetectable. | |
| Event-related bibliography: | ||
|
||||||||||||||||||||||||||
| Nutrient information: | ||||||||||||||||||||||||||
| Temperature Range During Event: | Max: 16 °C, Min: 9 °C | |||||||||||||||||||||||||
| Salinity Range During Event: | ||||||||||||||||||||||||||
| Bloom location in the water column: | ||||||||||||||||||||||||||
| Growth: |
In situ |
|||||||||||||||||||||||||
| Growth Comments | Most probably the population originated within the bays. | |||||||||||||||||||||||||
| Additional Environmental information: | The water column was well mixed. | |||||||||||||||||||||||||
|
|||||||||||||||||
| Kit used: | Type of kit used: | ||||||||||||||||
| Additional information: | One sample of mussels (Mytilus edulis) from Lennox Island in Malpeque Bay reached 18 µg/g on October 28, but this was an outlier; most of the samples contained less than 5 µg/g. Cascumpec Bay mussels and oysters (Crassostrea virginica) contained less than 3 µg/g. | ||||||||||||||||
| Economic losses: | |||||||||||||||||
| Management decision: | As a precaution due to levels nearing the federal limit of 20 µg/g, the following areas were closed to the harvesting of molluscan shellfish from October 31 to November 4: Lennox Channel, Darnley Basin, Malpeque Bay, Bideford River, and Conway Narrows. | ||||||||||||||||
| Additional harmful effect information: | |||||||||||||||||
