| Event name: | NO-95-001 | |
| 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 | |
| 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 (A few more dubious historical records. A yearly, more or less large scale and long lasting phenomenon since 1984 according to mouse bioassay. The phenomenon has never been so extensively monitored as since 1992.) | |
| Individuals to contact: | DAHL, Einar | |
| Location: | Latitude: , Longitude: | |
| General location information: |
South and innermost of Sodnefjord., HAB Area code(s): NO-09 |
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| Additional location information: | Dinophysis spp. were recorded all along the Norwegian coast but most numerous along the south and in the innemost part of the Sognefjord at the west coast. | |
| Bloom event dates (yyyy/mm/dd): | ||
| Quarantine levels dates (yyyy/mm/dd): | ||
| Additional date-related information: | In the period April-July toxin levels slightly above action level were recorde at some few stations along the coast. However, in general the problems in 1995 were minor. | |
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Dinophysis acuta
( cells/L)
Dinophysis acuminata ( cells/L) Dinophysis spp. ( cells/L) |
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| Co-Ocurring Species/Genus: | ||
| Chlorophyll concentration, if known: | µg/l | |
| Additional bloom information: | Most probably Dinophysis spp., with D. acuminata and D. acuta as the most potent species. | |
| 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: |
Advected
In situ |
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| Growth Comments | Along the southern coast there are some evidence that the algae and toxin problems are spread by advection. But along the west coast the "hot spots" seems to be rather patchy which indicate local concentration of the algae and/or in situ growth. | |||||||||||||||||||||||||
| Additional Environmental information: | The problems occur over a wide range of temperatures and salinities. | |||||||||||||||||||||||||
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| Kit used: | Type of kit used: | ||||||
| Additional information: | Control of shellfish toxicity by mouse bioassay. | ||||||
| Economic losses: | |||||||
| Management decision: | Harvesting was locally banned. The public was warned against picking toxic mussels. | ||||||
| Additional harmful effect information: | Toxins recorded above the action level according to mouse bioassay at one or another station from April-July. | ||||||
