| Event name: | NO-94-001 | |
| Country: | NORWAY | |
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Nature of the harmful event: |
High Phyto concentration | |
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Event directly affected: |
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| Toxicity detected: | Yes | |
| Associated syndrome: | OTHER | |
| 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 harmful bloom of C. polylepsis in May 1988. Since then, monitoring has revealed regular occurrence, about 1,000,000 cells/L, of Chrysocromulina spp. each year in May-June.) | |
| Individuals to contact: | DAHL, Einar | |
| Location: | Latitude: , Longitude: | |
| General location information: |
Norwegian Skagerrak Coast., HAB Area code(s): NO-12 |
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| Additional location information: | ||
| Bloom event dates (yyyy/mm/dd): | ||
| Quarantine levels dates (yyyy/mm/dd): | ||
| Additional date-related information: | May. | |
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Chrysochromulina spp.
(up to 6,00 cells/L)
Flodevigen Bay. |
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| Co-Ocurring Species/Genus: | ||
| Chlorophyll concentration, if known: | µg/l | |
| Additional bloom information: | It was a mixed bloom of Chrysochromulina spp, among them, about 50% C. polylepsis. | |
| Event-related bibliography: | ||
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| Nutrient information: | ||||||||||||||||||||||||||
| Temperature Range During Event: | Max: 13 °C, Min: 12 °C | |||||||||||||||||||||||||
| Salinity Range During Event: | ||||||||||||||||||||||||||
| Bloom location in the water column: |
Surface |
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| Growth: | Advected | |||||||||||||||||||||||||
| Growth Comments | The algae seemed to follow the Norwegian coastal current. | |||||||||||||||||||||||||
| Additional Environmental information: | A satellite imagery (AHVRR-data) showed sea surface temperatures between 12 and 13 ºC. Due to the meteorological conditions the mixed layer collapsed before any harmful bloom occurred. The Chrysochromulina spp. were found in the upper 10 m of the water | |||||||||||||||||||||||||
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| Kit used: | Type of kit used: | ||||||
| Additional information: | The bloom was not toxic to fish, but slightly toxic to Artemia salina in a bio-test. | ||||||
| Economic losses: | |||||||
| Management decision: | Intensivation of monitoring activity. | ||||||
| Additional harmful effect information: | |||||||
