General Information

Event name: ZAF-98-002
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: 18.004167
General location information: Saldanha Bay, West Coast
HAB Area code(s): SA-01
Additional location information: Sampling of oyster farm on 31 December 1998
Bloom event dates (yyyy/mm/dd): Event Date:1998-12-31
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Start and end of bloom not actually stipulate

Microalgae

Causative organism known: Yes
Causative Species/Genus: Aureococcus anophagefferens (0.24x10e8 cells/L)
sample from oyster ponds
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: 5.33 µg/l
Additional bloom information: Unidentified Chrysochromulina sp. were conspicuous amongst the microflagellate community.
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: 0.20
NITRATE: 0.98
NITRITE: 0.10
DIN: 0.2-1.28mmol N/m3
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column: Whole 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 12:02 on 19 Jun 2018
Updated at 02:19 on 19 Jun 2018
IOC/UNESCO ISSHA
IOC/UNESCO ICES PICES