General Information

Event name: SV-09-001
Nature of the harmful event:
Water Discoloration , Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 151 to 1427 STX eq/100 g in shellfish)
Associated syndrome: PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes
Event occurred before in this location: Yes (Similar events that cover the entire coast of El Salvador have been reported before)
Individuals to contact: AMAYA-MONTERROSA, Oscar , QUINTANILLA, Rebeca

Location & Date

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Location: Latitude: , Longitude:
General location information: ,
HAB Area code(s): ELS-01 ELS-02 ELS-03 ELS-04 ELS-05 ELS-06
Additional location information: The bloom presumably covered the entire coast of the country, but some sites reported higher cell abundance and toxicity, sucha as Mizata, Los Cóbanos and Jiqulisco. Water discoloration was also found 68km off the coast.
Bloom event dates (yyyy/mm/dd): Event Date:2009-11-01
Start: 2009-11-01, End: 2010-06-08
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Pyrodinium bahamense (40000000 cells/L)
Two varities of P. bahamense were found: compressum and bahamense
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: Licea, S., Navarrete, A., Castañeda, V. and J. Bustillos-Guzmán. 2013. Monitoring Program for Harmful Algal Blooms in Salvadoran Waters: Report of Pyrodinium bahamense from November 2009 to June 2010. Proceeding of the 14th International Conference on Harmful Algae. Espinoza, Jaime, Oscar Amaya, and Rebeca Quintanilla. 2013. Atlas de Fitoplancton Marino. 1st Ed. San Salvador: Universidad de El Salvador. 52p.

Environmental Conditions

Weather: 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
Crassostrea sp. Saxitoxins 7153.7 µgSTXeq/80g Bioassay-Mouse
Crassostrea iridescens Saxitoxins 144.81 Bioassay-Mouse
Kit used: Type of kit used:
Additional information: Toxicity factors to transform the analogs to saxitoxin equivalents were those given by Oshima (1995).
Economic losses:
Management decision:
Additional harmful effect information:
Created at 11:44 on 5 Jun 2018