General Information

Event name: ZAF-99-001
Country: SOUTH AFRICA
Nature of the harmful event:
Water Discoloration , High Phyto concentration
Event directly affected:
Shellfish
Toxicity detected: No
Associated syndrome: OTHER
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: No
Event occurred before in this location: Yes (Feb/March 1998)
Individuals to contact: MANSFIELD, Lisa

Location & Date

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Location: Latitude: -33.007500, Longitude: 18.004722
General location information: Saldanha Bay, West Coast
HAB Area code(s): SA-01
Additional location information: Sampling at the oyster farm
Bloom event dates (yyyy/mm/dd): Event Date:1999-02-01
Start: 1999-02-16, End: 1999-03-04
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:

Microalgae

Causative organism known: Yes
Causative Species/Genus: Aureococcus anophagefferens (4.06-8.41x10e8 cells/L)
between 16 Feb and 4 March 1999
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: 7.29-13.65 µg/l
Additional bloom information:
Event-related bibliography: PROBYN, T.A., BERNARD, S., PITCHER, G.C and R.N. PIENAAR 2010 Ecophysiological studies on Aureococcus anophagefferens blooms in Saldanha Bay, South Africa. Harmful Algae, 9: 123-133.

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: AMONIUM: 0.04-0.64 mmol N/m3
NITRATE: 0.02-0.41
NITRITE: 0.01-0.13
DIN: 0.19-1.07
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column:
Surface
Subsurface
Growth:
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:
Created at 02:40 on 19 Jun 2018
IOC/UNESCO ISSHA
IOC/UNESCO ICES PICES