| Event name: | ZAF-62-001 | |
| Country: | SOUTH AFRICA | |
|
Nature of the harmful event: |
Water Discoloration , High Phyto concentration , Mass mortalities , Foam/Mucilage in the coast | |
|
Event directly affected: |
Planktonic life , Natural Fish , Shellfish | |
| Toxicity detected: | No | |
| Associated syndrome: | OTHER | |
| Unexplained toxicity: | No | |
| 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: -34.218056, Longitude: 18.658056 | |
| General location information: |
False Bay and Walker Bay, South Coast HAB Area code(s): ZAF-02 |
|
| Additional location information: | Area covered by the bloom from Muizenberg in Flase Bay to Hermanus in Walker Bay | |
| Bloom event dates (yyyy/mm/dd): |
Event Date:1962-03-04 Start: 1962-03-03, End: 1962-03-10 |
|
| Quarantine levels dates (yyyy/mm/dd): | ||
| Additional date-related information: | ||
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Gonyaulax polygramma Stein 1883
(10000000 cells/L)
|
|
| Co-Ocurring Species/Genus: |
Prorocentrum micans Ehrenberg 1833
(1000000 cells/L)
ratio of 10:100 with G. polygramma |
|
| Chlorophyll concentration, if known: | µg/l | |
| Additional bloom information: | ||
| Event-related bibliography: | GRINDLEY, J.R. and F.J.R. TAYLOR 1962 - Red water and marine fauna mortality near Cape Town. Trans. Roy. Soc. S. Afr. 37: 111-130 + 1 plate. | |
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| Nutrient information: | ||||||||||||||||||||||||||
| Temperature Range During Event: | Max: 21.1 °C, Min: 11.0 °C | |||||||||||||||||||||||||
| Salinity Range During Event: | ||||||||||||||||||||||||||
| Bloom location in the water column: |
Surface Subsurface |
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| Growth: | ||||||||||||||||||||||||||
| Growth Comments | ||||||||||||||||||||||||||
| Additional Environmental information: | The fish killed were almost all inshore-reef and shallow-water fish. Large numbers of dead invertebrates only started to appear a few days after the start of the fish mortality. | |||||||||||||||||||||||||
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| Kit used: | Type of kit used: | ||||||
| Additional information: | |||||||
| Economic losses: | Over 100 tons of dead fish and invertebrates were removed from 4 miles of coast from Gordon's Bay and Strand. | ||||||
| Management decision: | |||||||
| Additional harmful effect information: | The sea in the Strand-Gordons Bay area became slimy with rotting plankton and the water produced an almost unbearable stench that was detectable in the centre of Cape Town 30 miles away. | ||||||
