General Information

Event name: ES-02-005
Country: SPAIN
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 39 - 146 g STX eq / 100 g. Meat.)
Associated syndrome: PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (Monitoring Programme of the Centro de Control do Medio Mario)
Event occurred before in this location: Yes
Individuals to contact: MANEIRO, Juan , PAZOS, Yolanda , SALGADO, Covadonga

Location & Date

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Location: Latitude: 43.392833, Longitude: -8.285167
General location information: Ra de Ares-Betanzos, Galicia, NW Spain.
HAB Area code(s): ES-05
Additional location information: 43 22.33' - 43 23.57' N; 08 14.57' - 08 17.11' W. The affected area is dedicated to intensive mussel cultivation in rafts and to a high production of other molluscs in natural banks: clams, cockles, oyster and scallops are the main species exploited.
Bloom event dates (yyyy/mm/dd): Event Date:2002-07-15
Start: 2002-07-31, End: 2002-08-02
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Alexandrium minutum (118,320 cells/L)
43 23.57' N; 08 17.11' W (St. L3) 15/07/02
Co-Ocurring Species/Genus: Chaetoceros gracilis (1,413,500 cells/L)
43 23.57' N; 08 17.11' W (St. L3) 15/07/02
Pseudo-nitzschia fraudulenta (104,400 cells/L)
Prorocentrum triestinum (67,860 cells/L)
Chlorophyll concentration, if known: 3.4 g/L Chl. µg/l
Additional bloom information:
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction: WSW
Stratified water: Yes Oxygen content (nL/L): Wind velocity: 57
Temperature (°C): 16.2 - 16.5 Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: 32.7 - 35. Current Velocity: 0
Nutrient information:
Temperature Range During Event: Max: 22 °C, Min: 13 °C
Salinity Range During Event: Max: 22, Min: 35
Bloom location in the water column:
In situ
Growth Comments
Additional Environmental information: Wind velocity: 57 Km/h.

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Wild mussel (Mytilus galloprovincialis) Saxitoxins STX eq 146 Bioassay-Mouse
Clams Saxitoxins STX eq 118 Bioassay-Mouse
Kit used: No Type of kit used:
Additional information: PSP AOAC Official Method, 1995
Economic losses: Not evaluated.
Management decision: Harvesting was closed in culture areas when PSP toxins concentrations were over 80 g STX eq/100 g wet weight.
Additional harmful effect information: Irrelevant effects, because the closures caused by this event were brief (two weeks maximum). Closures due to the presence of toxicity in molluscs is usual in the area and resource exploitation strategies allows to face these closures without great proble