General Information

Event name: PT-03-001
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 0.2 - 266 µg DA/g.)
Associated syndrome: ASP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (HAB Monitoring programme)
Event occurred before in this location: Yes
Individuals to contact: VILARINHO, Mª da Graça , VIEIRA, Mª Joao , VALE, Paulo

Location & Date

[View larger map]
Location: Latitude: 37.000000, Longitude: -8.000000
General location information: Viana do Castelo, *Aveiro, Figueira da Foz,**, Mainly NW coast of Portugal.
HAB Area code(s): PT-02 PT-03
Additional location information: 37º - 42ºN; 8º - 10ºW. 500 Km of shoreline.
Bloom event dates (yyyy/mm/dd): Start: 2003-07-31,
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Detection date: *31 July, **20 May.


Causative organism known: Yes
Causative Species/Genus: Pseudo-nitzschia spp. (85,700 cells/L)
* Aveiro bloom
Pseudo-nitzschia spp. (129,100 cells/L)
** Óbidos lagoon bloom
Co-Ocurring Species/Genus: Leptocylindrus danicus (26,500 cells/L)
* Aveiro
Chaetoceros sp. (6,000 cells/L)
* Aveiro
Leptocylindrus danicus (13,500 cells/L)
** Óbidos lagoon
Thalassiosira sp. (9,000 cells/L)
**Óbidos lagoon
Chaetoceros sp. (8,000 cells/L)
**Óbidos lagoon
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography:

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): Salinity: Current Velocity: 0
Nutrient information:
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column:
Growth Comments
Additional Environmental information: Temp: 15.2 Aveiro; 19.3 in Obidos. Salinity: 35.5 Aveiro; 36.5 in Obidos.

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Scallops Domoic Acid DA eq 266 LC
Other mollusc bivalves Domoic Acid DA eq 30 LC
Kit used: No Type of kit used:
Additional information: HPLC Quilliam Method.
Economic losses:
Management decision: Close the area to bivalve cath.
Additional harmful effect information: ND (not detected) <0.2 µg/g
Checked at 05:33 on 22 Feb 2018