| Event name: | NA-04-001 | |
| Country: | NAMIBIA | |
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Nature of the harmful event: |
High Phyto concentration | |
|
Event directly affected: |
Natural Fish , Birds | |
| Toxicity detected: | Yes (Approximate range: 118.7 - 182.2 ng/L) | |
| Associated syndrome: | ASP | |
| Unexplained toxicity: | No | |
| Species implicated in toxin transmission (transvector): | ||
| Report the outcome of a monitoring programme: | No | |
| Event occurred before in this location: | ||
| Individuals to contact: | MANSFIELD, Lisa | |
| Location: | Latitude: -23.005000, Longitude: 13.827222 | |
| General location information: |
Namibia, Northern Benguela HAB Area code(s): NAM-01 |
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| Additional location information: | ||
| Bloom event dates (yyyy/mm/dd): |
Event Date:2004-08-04 Start: 2004-08-04, End: 2004-08-10 |
|
| Quarantine levels dates (yyyy/mm/dd): | ||
| Additional date-related information: | ||
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Pseudo-nitzschia australis
(~62661.9 cells/L)
53% of the phytoplankton sample |
|
| Co-Ocurring Species/Genus: |
Pseudo-nitzschia pungens
(~55568.1 cells/L)
47% of the phytoplankton sample |
|
| Chlorophyll concentration, if known: | ~18mg/m3 µg/l | |
| Additional bloom information: | ||
| Event-related bibliography: | LOUW, D. C., DOUCETTE, G. J. and N. LUNDHOLM 2018 - Morphology and toxicity of Pseudo-nitzschia species in the northern Benguela upwelling system. Harmful Algae 75: 118-128. | |
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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: No | Type of kit used: | |||||||||||
| Additional information: | All samples extracts were analysed for the presence of DA by tandem mass spectrometry preceded by liquid chromatographic separation (LC-MS/MS). | |||||||||||
| Economic losses: | ||||||||||||
| Management decision: | To establish a baseline annual toxin monitoring programme and to investigate the toxicity trends related to abundance of Pseudo-nitzschia taxa. | |||||||||||
| Additional harmful effect information: | ||||||||||||
