General Information

Event name: ZAF-07-003
Nature of the harmful event:
Water Discoloration , High Phyto concentration , Mass mortalities
Event directly affected:
Natural Fish , Humans
Toxicity detected: No
Associated syndrome:
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: No
Event occurred before in this location:
Individuals to contact: MANSFIELD, Lisa , SCHWEIBOLD Laura

Location & Date

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Location: Latitude: -34.200000, Longitude: 18.649722
General location information: False Bay, Occidental Cape
HAB Area code(s): ZAF-02
Additional location information:
Bloom event dates (yyyy/mm/dd): Event Date:2007-02-01
Start: 2007-02-01, End: 2007-04-01
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Gonyaulax polygramma (20x10^6 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: Pitcher, G.C., Bernard, S., Ntuli, J., 2008. Contrasting bays and red tides in the southern Benguela upwelling system. Oceanography 21, 8291.

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity:
Nutrient information:
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column:
Growth Comments
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: Type of kit used:
Additional information:
Economic losses:
Management decision:
Additional harmful effect information: Small mortalities of marine organisms due to oxygen depletion resulting from bloom decay, extreme water discoloration.
Created at 10:14 on 6 Dec 2019
Updated at 01:06 on 6 Dec 2019