| Event name: | ZAF-89-001 | |
| Country: | SOUTH AFRICA | |
|
Nature of the harmful event: |
Water Discoloration , High Phyto concentration , Mass mortalities | |
|
Event directly affected: |
Natural Fish , Shellfish , Humans | |
| Toxicity detected: | Yes (Approximate range: 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: | Yes (A similar event was seen in 1988) | |
| Individuals to contact: | MANSFIELD, Lisa | |
| Location: | Latitude: -34.229167, Longitude: 18.695556 | |
| General location information: |
False Bay, South Coast HAB Area code(s): ZAF-02 |
|
| Additional location information: | The mortalities from this bloom spread from Fish Hoek to as far as Pearly Beach. | |
| Bloom event dates (yyyy/mm/dd): |
Event Date:1989-03-10 Start: 1989-03-10, End: 1989-03-25 |
|
| Quarantine levels dates (yyyy/mm/dd): | ||
| Additional date-related information: | ||
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Gymnodinium sp Horstman et al. 1991
(24707828 cells/L)
on 1989-03-13 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:
0.0 - 19.7 mmol.m-3
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| Temperature Range During Event: | Max: 20.0 °C, Min: 12.5 °C | |||||||||||||||||||||||||
| Salinity Range During Event: | ||||||||||||||||||||||||||
| Bloom location in the water column: | Whole column | |||||||||||||||||||||||||
| Growth: | Advected | |||||||||||||||||||||||||
| Growth Comments | ... the initial mortalities at Fish Hoek spread as far as Pearly Beach... | |||||||||||||||||||||||||
| 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 | |||||||||||
| Economic losses: | An estimated 40 tons of wild abalone were washed up on the shore during this bloom. | |||||||||||
| Management decision: | ||||||||||||
| Additional harmful effect information: | Bathers and fishermen suffered from eye, nose and lung irritations during the bloom. | |||||||||||
