General Information

Event name: ES-01-014
Country: SPAIN
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 34.1 g/g DA.)
Associated syndrome: ASP
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 (Detected annualy from 1995; generally with a periodicity of two events a year: at the beginning - middle of spring and autumn.)
Individuals to contact: MANEIRO, Juan , PAZOS, Yolanda , MOROO, ngeles

Location & Date

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Location: Latitude: 42.181667, Longitude: -8.685167
General location information: Ras Baixas (Vigo, Arousa and Muros) and Ra, Galicia, NW Spain.
HAB Area code(s): ES-05 ES-07 ES-08
Additional location information: 42 10.90' - 43 24.55' N; 8 41.11' - 9 03.00' 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:2001-09-24
Start: 2001-09-18, End: 2001-10-16
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: from 04/09/01 to 8/10/01

Microalgae

Causative organism known: Yes
Causative Species/Genus: Pseudo-nitzschia australis (852,600 cells/L)
Determined by electronic microscopy. Other species from the same genera are present in low concentrations.
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: 8.14 g/L Chl. µg/l
Additional bloom information: Oceanographic conditions and phytoplankton data presented are those at the maximum Pseudo-nitzschia cell concentration.
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: Yes Oxygen content (nL/L): 5.62 Wind velocity: 16
Temperature (°C): 15.39 Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: 35.77 Current Velocity: 0
Nutrient information: AMONIUM: 2.20 g/L
NITRATE: 2.34 g/L
NITRITE: 0.24 g/L
PHOSPHATE: 0.68 g/L
SILICATE: 0.00 g/L
Temperature Range During Event: Max: 17 °C, Min: 12 °C
Salinity Range During Event: Max: 36, Min: 27
Bloom location in the water column:
Subsurface
Growth: Advected
In situ
Growth Comments
Additional Environmental information: Wind direction: 336. Wind velocity: 16 Km/h

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Raft cultured mussel (Mytilus galloprovincial Domoic Acid DA eq 34.1 g/g LC
Infaunal bivalves from wild banks Domoic Acid DA eq 34.1 g/g LC
Kit used: No Type of kit used:
Additional information: AOAC Official Method, 1998 991.26, Domoic Acid in Mussels. Liquid Chromatographic Method.
Economic losses: Not evaluated
Management decision: Harvesting was closed in culture areas when domoic acid concentrations was greater than 20 ppm.
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
IOC/UNESCO ISSHA
IOC/UNESCO ICES PICES