General Information

Event name: KR-02-001
Nature of the harmful event:
Water Discoloration , High Phyto concentration , Mass mortalities
Event directly affected:
Natural Fish , Aquaculture Fish
Toxicity detected: No
Associated syndrome:
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (NFRDI/Korea-HAB monitoring program)
Event occurred before in this location:
Individuals to contact: Kang, Y.S.

Location & Date

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Location: Latitude: 34.583056, Longitude: 12.000000
General location information: Yeosu, Jeonnam province
HAB Area code(s): KR-04
Additional location information: patch with 1-150km length and 600m width
Bloom event dates (yyyy/mm/dd): Start: 2002-08-02, End: 2002-09-27
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: details in daily HABs newsletter issued by NFRDI and webpage (http//


Causative organism known: Yes
Causative Species/Genus: Cochlodinium polykrikoides (30000000 cells/L)
monospecific bloom
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: 15 µg/l
Additional bloom information:
Event-related bibliography: Details in daily HABs newsletter issued by NFRDI and webpage (http//

Environmental Conditions

Weather: fine Turbidity (NTU): Wind direction: NE
Stratified water: Oxygen content (nL/L): 7.2-10.1 Wind velocity:
Temperature (°C): 22.8-25.4 Oxygen saturation %: Current Direction:
Sechhi disk (m): 1-2 Salinity: Current Velocity: 0
Nutrient information: PHOSPHATE: 0.1-0.7uM
DIN: 10-50uM
Temperature Range During Event: Max: 28 °C, Min: 23 °C
Salinity Range During Event: Max: 33, Min: 28
Bloom location in the water column:
Growth: Advected
In situ
Growth Comments Extending to the Southern and eastern coast
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: direct loss: USD 4,900,000
Management decision: dispersion of yellow clay
Additional harmful effect information: culturing finfishes such as rockfish, flounder and seabream were died by suffocation when they were exposed to the dense bloom