General Information

Event name: ES-00-013
Country: SPAIN
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 42-186 Ág STXeq / 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 da Calidade do Medio Mari˝o.)
Event occurred before in this location: No
Individuals to contact: MANEIRO, Juan , PAZOS, Yolanda , MOROĐO, ┴ngeles

Location & Date

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Location: Latitude: 42.275000, Longitude: -8.705000
General location information: RÝas Baixas (Inner part of Vigo and Pontevedr, Galicia, NW Spain.
HAB Area code(s): ES-08
Additional location information: 42║ 16.50' - 42║ 25.30' N; 08║ 42.30' - 08║ 47.50' 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:2000-05-09
Start: 2000-04-24, End: 2000-05-04
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Alexandrium minutum (214,020 cells/L)
Co-Ocurring Species/Genus: Chaetoceros perpusillum (530,700 cells/L)
and others small diatoms
Chlorophyll concentration, if known: 4.0 Ág/L Chl¬. µg/l
Additional bloom information:
Event-related bibliography:

Environmental Conditions

Weather: Rainy. Turbidity (NTU): Wind direction: SSE
Stratified water: Yes Oxygen content (nL/L): 11 mL/L Wind velocity: 22
Temperature (°C): 19 (0m); 14 (10 Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: 30(0m); 35 Current Velocity: 0
Nutrient information: AMONIUM: 2.66 Ámol/L
NITRATE: 2.26 7.0 Ámol/L
NITRITE: 0.21 Ámol/L
PHOSPHATE: 0.34 Ámol/L
SILICATE: 2.74 Ámol/L
Temperature Range During Event: Max: 19 °C, Min: 14 °C
Salinity Range During Event: Max: 35, Min: 30
Bloom location in the water column:
In situ
Growth Comments
Additional Environmental information: P3 station of Ria de Pontevedra in 9/5/00. Wind velocity: 22 m/s.

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Raft cultured mussel (Mytilus galloprovincial Saxitoxins 186 Bioassay-Mouse
Kit used: No Type of kit used:
Additional information:
Economic losses: Not evaluated.
Management decision: Harvesting was closed in culture areas when .PSP toxins concentrations was over 80 Ág STX eq /100 g wet weight.
Additional harmful effect information: PSP AOAC Official Method, 1995. 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