| Event name: | ZAF-03-001 | |
| Country: | SOUTH AFRICA | |
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Nature of the harmful event: |
Water Discoloration , High Phyto concentration | |
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Event directly affected: |
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| Toxicity detected: | Yes | |
| Associated syndrome: | PSP | |
| Unexplained toxicity: | ||
| Species implicated in toxin transmission (transvector): | ||
| Report the outcome of a monitoring programme: | No | |
| Event occurred before in this location: | No | |
| Individuals to contact: | MANSFIELD, Lisa | |
| Location: | Latitude: -33.913056, Longitude: 18.435556 | |
| General location information: |
Cape Town Harbour, South Africa HAB Area code(s): ZAF-02 |
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| Additional location information: | ||
| Bloom event dates (yyyy/mm/dd): | Start: 2003-11-14, End: 2004-02-13 | |
| Quarantine levels dates (yyyy/mm/dd): | ||
| Additional date-related information: | Sampling initiated on 25 November 2003. | |
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Alexandrium minutum
(1.4x10e8 cells/L)
reached during mid-December period |
|
| Co-Ocurring Species/Genus: |
Scrippsiella trochoidea
(6.3x10e5 cells/L)
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| Chlorophyll concentration, if known: | 243 µg/l | |
| Additional bloom information: | This was a first record of Alexandrium minutum in South African waters. | |
| Event-related bibliography: | PITCHER, G.C., CEMBELLA, A.D. JOYCE, L.B., LARSEN, J., PROBYN, T.A. and C. RUIZ SEBASTIAN 2007 – The dinoflagellate Alexandrium minutum in Cape Town harbour (South Africa): Bloom characteristics, phylogenetic analysis and toxin composition. Harmful Algae 6: 823-836. | |
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| Nutrient information: |
AMONIUM:
2.50-9.82 mmol N/m3
NITRATE: 6.77-18.39 mmol N/m3 |
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| Temperature Range During Event: | Max: 18.2 °C, Min: 13.8 °C | |||||||||||||||||||||||||
| Salinity Range During Event: | Max: 37.6, Min: 34.1 | |||||||||||||||||||||||||
| Bloom location in the water column: | Whole 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: | The composition of PSP toxins from Cape Town harbour was characterised by the presence of only gonyautoxins (GTX1-GTX4). | |||||||||||
| Economic losses: | ||||||||||||
| Management decision: | ||||||||||||
| Additional harmful effect information: | ||||||||||||
