General Information

Event name: ES-00-022
Country: SPAIN
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes
Associated syndrome: DSP
Unexplained toxicity: Yes (Low cell concentration of the producing species.)
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (Monitoring Programme of Centre d'Aqüicultura-IRTA.)
Event occurred before in this location: Yes (This is the third closing of the of the bay for DSP toxicity (the first one occurred on January 1998, the second on January 2000).)
Individuals to contact: DELGADO, Maximino

Location & Date

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Location: Latitude: 40.620000, Longitude:
General location information: Alfacs Bay., Catalonia, NE Spain.
HAB Area code(s): ES-21
Additional location information: The affected area is dedicated to intensive mussel cultivation in rafts and to explotation of other natural shellfish (i.e. Clams).
Bloom event dates (yyyy/mm/dd): Start: 2000-03-20, End: 2000-04-03
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Dinophysis sacculus (140 cells/L)
??? Very low cell concentrations.
Co-Ocurring Species/Genus: Gyrodinium corsicum (500,000 cells/L)
Toxic to fauna
Chlorophyll concentration, if known: 0.7-3.9 µg/L Chlª. µg/l
Additional bloom information: Possibility of interference of Gyrodinium corsicum (toxic to fauna, co-occurring species) in the method (mouse bioassay).
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: 15 °C, Min: 15 °C
Salinity Range During Event: Max: 36, Min: 36
Bloom location in the water column: Whole column
Growth Comments It is not clear the origin of the toxicity.
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Mytilus galloprovincialis Okadaic Acid Bioassay-Mouse
Kit used: No Type of kit used:
Additional information: Mouse Bioassay PNT T-003.
Economic losses: It is not possible to evaluate due to the fact that there was a closing, without losses of the product.
Management decision: Closening of the bay for extraction and marketing of shellfish between 23 March and 4 April.
Additional harmful effect information: Possibility of interference of Gyrodinium corsicum (toxic to fauna, co-occurring species) in the method (mouse bioassay).