General Information

Event name: ES-01-011
Country: SPAIN
Nature of the harmful event:
Water Discoloration
Event directly affected:
Toxicity detected: No
Associated syndrome:
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 (In 1989)
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, Pontevedra, Arousa and Mur, Galicia, NW Spain.
HAB Area code(s): ES-05 ES-07 ES-08
Additional location information: 42 10.90' - 42 47.76' N; 8 41.11'- 9 0.00' 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:2001-10-22
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: from 24/09/01 to 29/10/01


Causative organism known: Yes
Causative Species/Genus: Karenia mikimotoi (12,180 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: 4.93 g/L Chl. µg/l
Additional bloom information: Oceanographic conditions and phytoplankton data presented are those at the maximum cell concentration but as the bloom was temporally and spatial very extensive, the general conditions were very wide.
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: Yes Oxygen content (nL/L): 5.05 Wind velocity: 27
Temperature (°C): 17.26 Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: 34.51 Current Velocity: 0
Nutrient information: AMONIUM: 1.04 g/L
NITRATE: 0.64 g/L
NITRITE: 0.24 g/L
SILICATE: 2.12 g/L
Temperature Range During Event: Max: 17 °C, Min: 13 °C
Salinity Range During Event: Max: 35, Min: 17
Bloom location in the water column:
Growth: Advected
In situ
Growth Comments
Additional Environmental information: Wind direction: 123. Wind velocity: 27 Km/h.

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: No Type of kit used:
Additional information:
Economic losses: Not evaluated
Management decision: All the social sectors affected were wide informated. Notes in local newspapers.
Additional harmful effect information: High social alarm by the water discoloration.