| Event name: | CA-91-003 | |
| Country: | CANADA | |
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Nature of the harmful event: |
Seafood toxins | |
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Event directly affected: |
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| Toxicity detected: | No | |
| Associated syndrome: | DSP | |
| Unexplained toxicity: | No | |
| Species implicated in toxin transmission (transvector): | ||
| Report the outcome of a monitoring programme: | Yes | |
| Event occurred before in this location: | Yes (Dinophysis norvegica and DTX-1 in mussels were previously found at the same location in early August, 1990.) | |
| Individuals to contact: | de FREITAS, Anthony | |
| Location: | Latitude: , Longitude: | |
| General location information: |
Halifax Eastern Shore, Scotia Fundy Region HAB Area code(s): CA-17 |
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| Additional location information: | Mahone Bay, Southern coast of Nova Scotia | |
| Bloom event dates (yyyy/mm/dd): | ||
| Quarantine levels dates (yyyy/mm/dd): | ||
| Additional date-related information: | May - June 91. | |
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Dinophysis norvegica
( cells/L)
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| Co-Ocurring Species/Genus: | ||
| Chlorophyll concentration, if known: | µg/l | |
| Additional bloom information: | ||
| Event-related bibliography: | ||
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| Nutrient information: | ||||||||||||||||||||||||||
| Temperature Range During Event: | Max: 12 °C, Min: 6 °C | |||||||||||||||||||||||||
| Salinity Range During Event: | ||||||||||||||||||||||||||
| Bloom location in the water column: | ||||||||||||||||||||||||||
| Growth: | ||||||||||||||||||||||||||
| Growth Comments | Not known. | |||||||||||||||||||||||||
| Additional Environmental information: | ||||||||||||||||||||||||||
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| Kit used: | Type of kit used: | ||||||||||||||||
| Additional information: | Low but detectable levels of DSP toxins were found in cultured mussels (Mytilus edulis). A 50:50 ratio of okadaic acid: DTX-1 two weeks later as levels began to drop. Levels in mussels became undetectable by early July. Plankton samples exhibited no detectable DSP toxins using ADAM & HPLC analysis, but the biomass of phytoplakton eas low by the time samples were collected for chemical analysis. | ||||||||||||||||
| Economic losses: | |||||||||||||||||
| Management decision: | The low levels of DSP toxins forund did not justify an official closure of mussel harvesting, but the mussel growers in the area voluntarily stopped harvesting for about a two month period as a precautionary measure. | ||||||||||||||||
| Additional harmful effect information: | |||||||||||||||||
