| Event name: | NL-89-008 | |
| Country: | NETHERLANDS | |
|
Nature of the harmful event: |
Seafood toxins | |
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Event directly affected: |
Shellfish | |
| Toxicity detected: | Yes (Approximate range: Positive rat bioassay) | |
| Associated syndrome: | DSP | |
| Unexplained toxicity: | No | |
| Species implicated in toxin transmission (transvector): | ||
| Report the outcome of a monitoring programme: | Yes (Phytoplankton Monitoring program. Rijkswaterstaat's North Sea Directorate.) | |
| Event occurred before in this location: | Yes (1976, 1979, 1981, 1986) | |
| Individuals to contact: | WETSTEYN, L.P.M.J , POELMAN, Marnix | |
| Location: | Latitude: 53.327778, Longitude: 5.234444 | |
| General location information: |
Wadden Sea, HAB Area code(s): NL-01 |
|
| Additional location information: | Stations W30, W420, W590, E250. | |
| Bloom event dates (yyyy/mm/dd): |
Event Date:1989-10-01 Start: 1989-09-01, End: 1989-10-30 |
|
| Quarantine levels dates (yyyy/mm/dd): | First detection: 1989-10-01, End: 1989-11-01 | |
| Additional date-related information: | After October gradual decrease of toxicity. | |
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Dinophysis rotundata
(10 - 180 cells/L)
Station E250 Dinophysis rotundata (1100 cells/L) Station W590 Dinophysis rotundata (10 cells/L) Station W420 Dinophysis rotundata (10 - 200 cells/L) Station W30 Dinophysis acuminata (100 cells/L) water samples from sept - October Dinophysis acuminata (60 cells/L) nethauls 60 liters |
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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: °C, Min: °C | |||||||||||||||||||||||||
| Salinity Range During Event: | ||||||||||||||||||||||||||
| Bloom location in the water column: | Whole column | |||||||||||||||||||||||||
| Growth: | Advected | |||||||||||||||||||||||||
| Growth Comments | ||||||||||||||||||||||||||
| Additional Environmental information: | ||||||||||||||||||||||||||
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| Kit used: No | Type of kit used: | ||||||||||||||||
| Additional information: | Bioassay-Rat. | ||||||||||||||||
| Economic losses: | Closure of the area for shellfish fisheries. Production continued in Oosterschelde. | ||||||||||||||||
| Management decision: | Although the toxicity measured by the rat bioassays was low, closure of mussel production in the western Wadden sea during October-November was necessary. | ||||||||||||||||
| Additional harmful effect information: | In 1989 DSP was measured in samples from the western Wadden sea. | ||||||||||||||||
