General Information

Event name: KR-07-002
Nature of the harmful event:
Water Discoloration , High Phyto concentration , Mass mortalities
Event directly affected:
Natural Fish , Aquaculture Fish
Toxicity detected: No
Associated syndrome: OTHER
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (NFRDI/Kora HAB monitoring program)
Event occurred before in this location: Yes (high water temperature season since 1995)
Individuals to contact: Lee, Changkyu , Park, Taegyu

Location & Date

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Location: Latitude: 35.333056, Longitude: 129.333056
General location information: Gyeongbuk-Gangwon province, Pohang-wooljin
HAB Area code(s): KR-02
Additional location information: tens kilometers in length and several hundred meters in width
Bloom event dates (yyyy/mm/dd): Start: 2007-08-16, End: 2007-09-15
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Cochlodinium polykrikoides Margalef 1961 (6500000 cells/L)
monospecific blooms
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: 7 µg/l
Additional bloom information:
Event-related bibliography: daily HAB newsletter issued by NFRDI and webpage

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: No Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): 2-8 Salinity: Current Velocity:
Nutrient information:
Temperature Range During Event: Max: 25.5 °C, Min: 19.2 °C
Salinity Range During Event: Max: 33, Min: 32
Bloom location in the water column: Whole column
Growth: Advected
In situ
Growth Comments advected to the north 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: USD 2,500,000
Management decision: mitigation by clay control method
Additional harmful effect information: