| Event name: | ZAF-88-001 | |
| Country: | SOUTH AFRICA | |
|
Nature of the harmful event: |
Water Discoloration , High Phyto concentration , Seafood toxins , Mass mortalities | |
|
Event directly affected: |
Natural Fish , Shellfish , Humans | |
| Toxicity detected: | Yes (Approximate range: Not specified) | |
| Associated syndrome: | OTHER , Aerosolized toxins effects | |
| 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: -34.221667, Longitude: 18.759167 | |
| General location information: |
False Bay, South Coast HAB Area code(s): ZAF-02 |
|
| Additional location information: | During 1988 the furtherest station where sampling occurred is Hermanus in the Walker Bay area. | |
| Bloom event dates (yyyy/mm/dd): |
Event Date:1988-05-24 Start: 1988-04-16, End: 1988-05-24 |
|
| Quarantine levels dates (yyyy/mm/dd): | ||
| Additional date-related information: | ||
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Gymnodinium sp Horstman et al. 1991
(17127668 cells/L)
on 1988-05-24 at Gordons Bay |
|
| Co-Ocurring Species/Genus: | ||
| Chlorophyll concentration, if known: | µg/l | |
| Additional bloom information: | ||
| Event-related bibliography: | HORSTMAN, D.A., S. MCGIBBON, G.C. PITCHER, D. CALDER, L. HUTCHINGS and P. WILLIAMS 1991 – Red tides in False Bay, 1959-1989, with particular reference to recent blooms of Gymnodinium sp. Transactions of the Royal Society of South Africa 47: 611-628. | |
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| Nutrient information: |
NITRATE:
0.2 - 13.5 mmol.m-3
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| Temperature Range During Event: | Max: 18.0 °C, Min: 14.2 °C | |||||||||||||||||||||||||
| Salinity Range During Event: | ||||||||||||||||||||||||||
| Bloom location in the water column: | Whole column | |||||||||||||||||||||||||
| Growth: | Advected | |||||||||||||||||||||||||
| Growth Comments | The bloom was much more localised, being mainly in Gordons Bay and Strand, but spreading a little to Koeelbaai and Hermanus. | |||||||||||||||||||||||||
| Additional Environmental information: | Bathers and fishermen suffered from eye, nose and lung irritations during the bloom. | |||||||||||||||||||||||||
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| Kit used: | Type of kit used: | |||||||||||
| Additional information: | A sea-urchin assay was performed on water samples collected on 16 May 1988. | |||||||||||
| Economic losses: | ||||||||||||
| Management decision: | ||||||||||||
| Additional harmful effect information: | Bathers and fishermen suffered from eye, nose and lung irritations during the bloom. | |||||||||||
