General Information

Event name: ES-02-010
Country: SPAIN
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 25.2 g DA / g)
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 annually 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

[View larger map]
Location: Latitude: 42.781667, Longitude: -8.968333
General location information: Ra de Camarias, Outer area of Ra de Muros-, Galicia, NW Spain.
HAB Area code(s): ES-06 ES-07
Additional location information: 43 07' - 42 43.40' N; 09 03' - 09 02' W. The affected area is dedicated to intensitve 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:2002-09-03
Start: 2002-08-29, End: 2002-09-02
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:

Microalgae

Causative organism known: Yes
Causative Species/Genus: Pseudo-nitzschia australis (227,940 cells/L)
42 46.90' N; 08 58.10' W (St. M6) on 03/09/02
Co-Ocurring Species/Genus: Chaetoceros perpusillum (2,944,000 cells/L)
42 46' 90'' N; 08 58' 10'' W (St. M6) on 03/09/02
Leptocylindrus danicus (610,740 cells/L)
Detonula pumila (132,240 cells/L)
Chlorophyll concentration, if known: 9.9 g/L Chl. µg/l
Additional bloom information:
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction: NE
Stratified water: No Oxygen content (nL/L): 6.1 - 6.5 Wind velocity: 63
Temperature (°C): 14.1 - 14.9 Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: 35.1 35.4 Current Velocity: 0
Nutrient information: AMONIUM: 0.30 - 0.72 g/L
NITRATE: 2.1 - 2.4 g/L
NITRITE: 0.26 - 0.33 g/L
PHOSPHATE: 0.40 - 0.50 g/L
SILICATE: 0 - 1.1 g/L
Temperature Range During Event: Max: 14 °C, Min: 14 °C
Salinity Range During Event: Max: 35, Min: 35
Bloom location in the water column:
Subsurface
Growth:
In situ
Growth Comments
Additional Environmental information: Data from St. M6. Wind velocity: 63 Km/h.

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Cockles (Cerastoderma edule) Domoic Acid DA eq 25.2 g/g LC
Clams Domoic Acid DA eq 21.1 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: Harveting was closed in culture areas when domoic acid concentrations was greater than ppm.
Additional harmful effect information: Irrelevant effects, because the closures caused by this event were brief (two weeks maximum). Closures due to the rpesence of toxicity in molluscs is usual in the area and resource expolitation strategies alow to face these closrues without great problems
IOC/UNESCO ISSHA
IOC/UNESCO ICES PICES