General Information

Event name: ZAF-91-001
Nature of the harmful event:
Water Discoloration , Seafood toxins
Event directly affected:
Toxicity detected: Yes
Associated syndrome: DSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector): mussels
Report the outcome of a monitoring programme: No
Event occurred before in this location: No
Individuals to contact: MANSFIELD, Lisa

Location & Date

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Location: Latitude: -33.350556, Longitude: 18.149444
General location information: Yzerfontein, West Coast
HAB Area code(s): ZAF-01
Additional location information:
Bloom event dates (yyyy/mm/dd): Start: 1991-03-01, End: 1991-04-30
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Dinophysis acuminata (200000 cells/L)
Elands Bay on 10 March 1991
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: PITCHER, G.C., D.A. HORSTMAN, D. CALDER, J.H. DE BRUYN and B.J. POST 1993 The first record of diarrhetic shellfish poisoning on the South African coast. S. Afr. J Sci. 89: 512 -514

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
Dinophysis acuminata Okadaic Acid 2g OA per g hepato Bioassay-Mouse
Kit used: Yes Type of kit used: ELISA
Additional information:
Economic losses:
Management decision: Public warning against collecting mussels in the area
Additional harmful effect information: Several reports of illness
Created at 04:42 on 26 Sep 2017
Updated at 12:02 on 5 Jan 2018