| Event name: | NO-00-002 | |
| Country: | NORWAY | |
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Nature of the harmful event: |
Seafood toxins | |
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Event directly affected: |
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| Toxicity detected: | Yes (Approximate range: >16 ppm OA (up to 150 ppm OA).) | |
| Associated syndrome: | DSP | |
| Unexplained toxicity: | No | |
| Species implicated in toxin transmission (transvector): | Mytilus edulis. | |
| Report the outcome of a monitoring programme: | Yes (National Monitoring in Norway.) | |
| Event occurred before in this location: | Yes (Recurrent.) | |
| Individuals to contact: | DAHL, Einar | |
| Location: | Latitude: , Longitude: | |
| General location information: |
Norwegian coas from Sweden to Stad., HAB Area code(s): NO-09 |
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| Additional location information: | The number of cells increased gradually and toxicity above safety level was detected in the middle of July at southern coast and occurred successively later further west and north along the coast. The bloom declined in late in the autumn, but the shell remained toxic through the rest of the year, and was still toxic in some areas in March 2001. ICES fishing area: IIIa & IV a. | |
| Bloom event dates (yyyy/mm/dd): | ||
| Quarantine levels dates (yyyy/mm/dd): | ||
| Additional date-related information: | July 2000-December 2000. | |
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Dinophysis acuta
(4,700 cells/L)
Ceratium spp. ( cells/L) |
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| Co-Ocurring Species/Genus: | ||
| Chlorophyll concentration, if known: | About 2 µg/L Chlª in the period the shellfis µg/l | |
| Additional bloom information: | Dinophysis spp. occur annually in our coastal waters and DST in mussels above safety level is recorded each year. However, the spatial and temporal distribution of Dinophysis and related toxicity of mussels may vary much from one year to another. In 2000 | |
| Event-related bibliography: | Dahl, E. and Johannessen, T. (2001). Relationship between occurrence of Dinophysis species (Dinophyceae) and shellfish toxicity. Phycologia 40 (3). | |
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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: | ||||||||||||||||||||||||||
| Growth Comments | ||||||||||||||||||||||||||
| Additional Environmental information: | ||||||||||||||||||||||||||
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| Kit used: | Type of kit used: | |||||||||||
| Additional information: | Standard mouse bioassays were also positive. | |||||||||||
| Economic losses: | Mussel plants were banned from harvesting | |||||||||||
| Management decision: | Harvesting was stopped and the public was warned. | |||||||||||
| Additional harmful effect information: | Very few intoxications were reported, the public was warned. No other effects registrated. | |||||||||||
