Event name: | CA-95-006 | |
Country: | CANADA | |
Nature of the harmful event: |
Seafood toxins | |
Event directly affected: |
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Toxicity detected: | Yes (Approximate range: > 80 µg STXeq / 100 g.) | |
Associated syndrome: | PSP | |
Unexplained toxicity: | No | |
Species implicated in toxin transmission (transvector): | ||
Report the outcome of a monitoring programme: | Yes | |
Event occurred before in this location: | Yes (PSP toxicity has been measured by the mouse bioassay technique on a regular basis since 1961 in the St. Lawrence. Algae are monitored at the coastal stations only since 1989.) | |
Individuals to contact: | GÉLINAS, Roger , LEVASSEUR, Maurice |
Location: | Latitude: , Longitude: | |
General location information: |
various locations, Quebec Region HAB Area code(s): CA-07 |
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Additional location information: | Harmful algae are monitored on a weekly basis at 11 stations in the Gulf of St. Lawrence since 1989. See Complementary Information. | |
Bloom event dates (yyyy/mm/dd): | Start: 1995-06-01, End: 1995-08-31 | |
Quarantine levels dates (yyyy/mm/dd): | ||
Additional date-related information: | Various times during June-August. |
Causative organism known: | Yes | |
Causative Species/Genus: |
Prorocentrum lima
(2,600 cells/L)
August 30 in Havre-aux-Maisons station Prorocentrum minimum (5,280 cells/L) August 27 in Tête à la Baleine station. Dinophysis norvegica (3,660 cells/L) June 25 in Carleton station Alexandrium tamarense (2,680 cells/L) June 12 in Penouille station Dinophysis acuminata (1,720 cells/L) August 2 in Mont-Louis station Alexandrium ostenfeldii (1,620 cells/L) June 12 in Penouille station Pseudo-nitzschia delicatissima (91,306 cells/L) August 20 in Tête à la Baleine station Pseudo-nitzschia seriata (120,608 cells/L) August 15 in Ste-Flavie |
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Co-Ocurring Species/Genus: | ||
Chlorophyll concentration, if known: | µg/l | |
Additional bloom information: | A. tamarense and A. ostenfeldii were the causative species, of the PSP effects. Eight potentially harmful species have been found at the eleven coastal stations. | |
Event-related bibliography: |
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Nutrient information: | ||||||||||||||||||||||||||
Temperature Range During Event: | Max: °C, Min: °C | |||||||||||||||||||||||||
Salinity Range During Event: | ||||||||||||||||||||||||||
Bloom location in the water column: | ||||||||||||||||||||||||||
Growth: |
In situ |
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Growth Comments | ||||||||||||||||||||||||||
Additional Environmental information: |
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Kit used: | Type of kit used: | ||||||
Additional information: | Paralytic Shellfish toxins concentration have exceeded 80 µg STX equi./100 g (as determined by the mouse bioassay technique) at several stations. | ||||||
Economic losses: | |||||||
Management decision: | Shellfish areas with paralytic shellfish toxins concentration exceeding 80 µg STX eq/100 g (as determined by the mouse bioassay technique) were closed to harvesting during variable periods of time during summer months. | ||||||
Additional harmful effect information: |