General Information

Event name: DZ-03-001
Country: ALGERIA
Nature of the harmful event:
Water Discoloration , High Phyto concentration
Event directly affected:
Toxicity detected: No
Associated syndrome:
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: No
Event occurred before in this location: No
Individuals to contact: ILLOUL, Hassina

Location & Date

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Location: Latitude: 36.816667, Longitude: 3.233056
General location information: Algiers Bay, Algiers Wilaya
HAB Area code(s): DZ-06
Additional location information: A yellowish discoloration occupied the whole Algiers bay (about 10 km wide) and the offshore waters (more than 100 km).
Bloom event dates (yyyy/mm/dd): Event Date:2003-08-12
Start: 2003-08-01, End: 2003-08-15
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Calyptrosphaera sphaeroidea (470 000 000 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: Satellite imagery (MOdis/Aqua)showed the offshore extension of the coccolithophore bloom advected by an anticyclonic eddy (AVHRR imagery)
Event-related bibliography: Illoul, H., Masó, M., Fortuño, J-M, Cros, L., Morales-Blake, A. et Séridji, R. 2008. Potentially harmful microalgae in coastal waters of the Algiers area (Southern Mediterranean Sea). Cryptogamie Algologie. 29 (3) : 261-278.

Environmental Conditions

Weather: sunny Turbidity (NTU): Wind direction:
Stratified water: Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity:
Nutrient information:
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column:
Growth Comments
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: Type of kit used:
Additional information:
Economic losses:
Management decision:
Additional harmful effect information: