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
|
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.
|
Weather:
|
calm
|
Turbidity (NTU):
|
|
Wind direction:
|
|
Stratified water:
|
|
Oxygen content (nL/L):
|
|
Wind velocity:
|
|
Temperature (°C):
|
14.2 - 18
|
Oxygen saturation %:
|
|
Current Direction:
|
|
Sechhi disk (m):
|
|
Salinity:
|
|
Current Velocity:
|
|
|
Nutrient information:
|
NITRATE:
0.2 - 13.5 mmol.m-3
|
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.
|