General Information

Event name: PT-96-002
Country: PORTUGAL
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: Positive to DSP.)
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 areas were Minho estuary, Aveiro Lagoon , Mondego estuary, Obidos Lagoon and Sagres.)
Individuals to contact: SAMPAYO, M¬ Antonia , VILARINHO, M¬ da Graša

Location & Date

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Location: Latitude: , Longitude:
General location information: Minho Estuary.,
HAB Area code(s): PT-01
Additional location information: Minho estuary and litoral North
Bloom event dates (yyyy/mm/dd): Event Date:1996-06-19
Start: 1996-05-21, End: 1996-07-17
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:

Microalgae

Causative organism known: Yes
Causative Species/Genus: Dinophysis sp. (750 cells/L)
Dinophysis cf. Acuminata. June 19th
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: 16 °C
Salinity Range During Event: Max: 36, Min: 24
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
Mytilus edulis Okadaic Acid Positive Bioassay-Mouse
Mytilus edulis Okadaic Acid OA eq LC
Kit used: No Type of kit used:
Additional information: Mostly mussels ( Mytilus edulis ) from these regions presented DSP toxins. DSP toxins were determined both by the mouse bioassay and through HPLC.
Economic losses:
Management decision: Harvest of affected species closed during toxication.
Additional harmful effect information:
Checked at 05:34 on 22 Feb 2018
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