General Information

Event name: PL-97-001
Country: POLAND
Nature of the harmful event:
Water Discoloration
Event directly affected:
Planktonic life
Toxicity detected: No
Associated syndrome:
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: No
Event occurred before in this location:
Individuals to contact: Mazur-Marzec, Hanna

Location & Date

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Location: Latitude: , Longitude:
General location information: Gulf of Gdańsk, Southern Baltic
HAB Area code(s): PL-01
Additional location information: ICES fishing area: IIId 26. The brown-red water bloom was observed in one of the Gdynia harbour basins, located at the mouth of the Chylonka stream (about 400 m2).
Bloom event dates (yyyy/mm/dd): Event Date:1997
Start: 1997-08-28, End: 1997-09-09
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Prorocentrum minimum (35 000 000 cells/L)
Co-Ocurring Species/Genus: Heterocapsa triquetra ( cells/L)
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: Witek B., Pliński M., 2000, The firs recorded bloom of Prorocentrum minimum (Pavillard) Schiller in the coastal zone of the Gulf of Gdańsk, Oceanologia, 42(1): 29-36. Witek B., Pliński M., 2005, The occurrence of dinoflagellates in the phytoplankton of the Gulf of Gdańsk coastal zone in 1994-1997, Ocean. Hydrobiol. Stud. 34(2): 63-70.

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: 22 °C, Min: 17 °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
Kit used: Type of kit used:
Additional information:
Economic losses:
Management decision:
Additional harmful effect information:
Checked at 10:22 on 29 Apr 2014