General Information

Event name: PT-98-012
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 131 g/g)
Associated syndrome: DSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes
Event occurred before in this location: Yes (Since 1987, the first year of confirmed occurrence, the problem has occurred every year, with a break in 1993. This year the most affected area was Algarve.)
Individuals to contact: SAMPAYO, M Antonia , VILARINHO, M da Graa

Location & Date

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Location: Latitude: , Longitude:
General location information: Faro, Olhao., Algarve.
HAB Area code(s): PT-06 PT-07
Additional location information:
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: February-March, May-August, October-November.


Causative organism known: Yes
Causative Species/Genus: Dinophysis acuminata (500 cells/L)
October 27
Dinophysis acuta (100 cells/L)
October 27
Dinophysis acuminata (71,429 cells/L)
February 18
Dinophysis acuminata (1,000 cells/L)
May 20
Dinophysis acuminata (250 cells/L)
August 3
Dinophysis acuta (4,083 cells/L)
August 3
Co-Ocurring Species/Genus:
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: 19 °C, Min: 15 °C
Salinity Range During Event: Max: 37, Min: 24
Bloom location in the water column:
Growth: Advected
In situ
Growth Comments Probably a combination of both.
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Donax spp., February 12 Okadaic Acid OA eq 131 g/g Bioassay-Mouse
Donax spp., May 20 Okadaic Acid OA eq 37 g/g Bioassay-Mouse
Donax spp., August 3 Okadaic Acid OA eq 113 g/g Bioassay-Mouse
Donax spp., October 27 Okadaic Acid OA eq 17 g/g Bioassay-Mouse
Kit used: No Type of kit used:
Additional information:
Economic losses:
Management decision: Harvest of affected areas closed during toxication.
Additional harmful effect information: DSP toxins were determined both by the mouse bioassay and through HPLC
Checked at 05:33 on 22 Feb 2018