General Information

Event name: SV-19-001
Nature of the harmful event:
Water Discoloration , High Phyto concentration
Event directly affected:
Other Terrestrial
Toxicity detected: No
Associated syndrome:
Unexplained toxicity: Yes (Toxins were not measured but water discoloration coincided with dead molluscs and signs of intoxication in piglets.)
Species implicated in toxin transmission (transvector): Possibly Anadara sp.
Report the outcome of a monitoring programme: Yes (National Monitoring Program of Harmful Algal Blooms)
Event occurred before in this location: No
Individuals to contact: AMAYA-MONTERROSA, Oscar , QUINTANILLA, Rebeca

Location & Date

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Location: Latitude: 13.201944, Longitude: -88.443333
General location information: Isla La Pirraya, Bahía de Jiquilisco, Usulután
HAB Area code(s): ELS-04
Additional location information:
Bloom event dates (yyyy/mm/dd): Event Date:2019-02-16
Start: 2019-02-16, End: 2019-02-18
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Aphanizomenon sp. (127000 cells/L)
colonies per liter. Colonies were counted since cells were moderately disintegrated and difficult to indentify individually
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: Aphanizomenon presented filaments forming fascicle-like colonies that ranged from 99 to 698 µm in length and 46 to 257 µm in width.
Event-related bibliography: Quintanilla, R., Amaya, O. & J. Guerra. 2019. Unprecedented bloom of the cyanobacteria Aphanizomenon in a coastal bay of El Salvador. Harmful Algae News 62: 12-13.

Environmental Conditions

Weather: Dry season Turbidity (NTU): Wind direction:
Stratified water: Oxygen content (nL/L): Wind velocity:
Temperature (°C): 30.4 - 31.1 Oxygen saturation %: Current Direction:
Sechhi disk (m): 2.0 - 2.3 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:
Created at 04:40 on 3 Jul 2019