General Information

Event name: PT-88-006
Nature of the harmful event:
Water Discoloration
Event directly affected:
Toxicity detected: No
Associated syndrome: PSP
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: No
Event occurred before in this location: Yes (1987)
Individuals to contact: FRAGA, Santiago , SAMPAYO, M Antonia , LIMA, Carmen

Location & Date

[View larger map]
Location: Latitude: , Longitude:
General location information: Off Espinho and northern coast,
HAB Area code(s): PT-01
Additional location information: Bivalve mollusc beds
Bloom event dates (yyyy/mm/dd): Start: 1988-08-24, End: 1988-11-03
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Gymnodinium catenatum ( cells/L)
Co-Ocurring Species/Genus: Dinophysis acuta ( cells/L)
Chlorophyll concentration, if known: µg/l
Additional bloom information: First occurrence Feb. 17: 100 cell/l; toxin detection none Max. 16000 cell/l on Oct. 20, being the dominant species in the sample followed by Dinophysis acuta (11500 cells/l). Other counts mostly in range 500-2000 cells/l
Event-related bibliography:

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: 18 °C, Min: 13 °C
Salinity Range During Event: Max: 35.5, Min: 20
Bloom location in the water column:
Growth Comments
Additional Environmental information: No other physical measurments taken Water colouration - no evident change

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: Harvesting of shellfish banned when toxin level upper than 80 g/100 g
Additional harmful effect information: All bivalve molluscs affected (max. 173 g/100g)No human illness reported.
Checked at 05:32 on 22 Feb 2018