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Event name:
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ZAF-88-001
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Country:
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SOUTH AFRICA
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Nature of the harmful event:
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Water Discoloration
,
High Phyto concentration
,
Seafood toxins
,
Mass mortalities
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Event directly affected:
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Natural Fish
,
Shellfish
,
Humans
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Toxicity detected:
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Yes
(Approximate range: Not specified)
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Associated syndrome:
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OTHER
,
Aerosolized toxins effects
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Unexplained toxicity:
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No
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Species implicated in toxin transmission (transvector):
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Report the outcome of a monitoring programme:
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No
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Event occurred before in this location:
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No
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Individuals to contact:
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MANSFIELD, Lisa
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Causative organism known:
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Yes
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Causative Species/Genus:
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Gymnodinium sp Horstman et al. 1991
(17127668 cells/L)
on 1988-05-24 at Gordons Bay
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Co-Ocurring Species/Genus:
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Chlorophyll concentration, if known:
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µg/l
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Additional bloom information:
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Event-related bibliography:
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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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Weather:
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calm
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Turbidity (NTU):
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Wind direction:
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Stratified water:
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Oxygen content (nL/L):
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Wind velocity:
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Temperature (°C):
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14.2 - 18
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Oxygen saturation %:
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Current Direction:
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Sechhi disk (m):
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Salinity:
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Current Velocity:
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Nutrient information:
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NITRATE:
0.2 - 13.5 mmol.m-3
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Temperature Range During Event:
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Max: 18.0 °C, Min: 14.2 °C
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Salinity Range During Event:
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Bloom location in the water column:
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Whole column
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Growth:
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Advected
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Growth Comments
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The bloom was much more localised, being mainly in Gordons Bay and Strand, but spreading a little to Koeelbaai and Hermanus.
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Additional Environmental information:
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Bathers and fishermen suffered from eye, nose and lung irritations during the bloom.
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