General Information

Event name: PT-95-037
Nature of the harmful event:
Water Discoloration , High Phyto concentration
Event directly affected:
Toxicity detected: No
Associated syndrome:
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes
Event occurred before in this location: No
Individuals to contact: SAMPAYO, M¬ Antonia , VILARINHO, M¬ da Graša

Location & Date

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Location: Latitude: , Longitude:
General location information: Aveiro litoral.,
HAB Area code(s): PT-02
Additional location information:
Bloom event dates (yyyy/mm/dd): Start: 1995-06-06, End: 1995-06-09
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Chaetoceros gracilis (100,000,00 cells/L)
Leptocylindrus danicus (115,000,00 cells/L)
Nitzschia sp. (24,000,000 cells/L)
Pseudo-nitzschia spp. (27,000,000 cells/L)
Rhizosolenia delicatula (10,000,000 cells/L)
Rhizosolenia fragilissima (13,000,000 cells/L)
Rhizosolenia stolterfothii (700,000 cells/L)
Thalassiosira pseudonana (110,000,00 cells/L)
Skeletonema costatum (5,000,000 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: Additional species: small flagellates: 110,000,000 cells/L.
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: No Oxygen content (nL/L): Wind velocity:
Temperature (°C): 16 Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: 36 Current Velocity: 0
Nutrient information:
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column:
Growth: Advected
In situ
Growth Comments Most probably a combination of both.
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: No Type of kit used:
Additional information:
Economic losses:
Management decision: None.
Additional harmful effect information: Water discoloration.
Checked at 05:34 on 22 Feb 2018