General Information

Event name: PT-88-007
Nature of the harmful event:
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: SAMPAYO, M Antonia , LIMA, Carmen , FRANCA, Susana

Location & Date

[View larger map]
Location: Latitude: , Longitude:
General location information: Mondego Estuary and coast,
HAB Area code(s): PT-01
Additional location information: Bivalve mollusc beds
Bloom event dates (yyyy/mm/dd): Start: 88-08-01, End: 88-12-13
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:
Chlorophyll concentration, if known: µg/l
Additional bloom information: First occurrence Jun. 14: 500 cells/l; toxin level 50.4 g/100g in Screbicularia plana. Max. 13000 cells/l on Oct. 18, dominant species D. acuta (24000 cells/l). Other counts mostly in the range 500-7000 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: Very patchy distibution. Toxicity in bivalve molluscs generally detected two weeks after Dinophysis acuta and/or D. sacculus appear in the phytoplankton. The problem at Portuguese coast is expanding to South.

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/100g
Additional harmful effect information: All bivalve molluscs affected (max. 173 g/100g). No humal illness reported.
Checked at 05:32 on 22 Feb 2018