General Information

Event name: VE-79-001
Nature of the harmful event:
Water Discoloration
Event directly affected:
Toxicity detected: No
Associated syndrome: PSP
Unexplained toxicity:
Species implicated in toxin transmission (transvector): Contaminated mussels.
Report the outcome of a monitoring programme: No
Event occurred before in this location:
Individuals to contact: VALERIO, Lorelys

Location & Date

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Location: Latitude: , Longitude:
General location information: Isla de Margarita, Nueva Esparta
HAB Area code(s): VE-04
Additional location information:
Bloom event dates (yyyy/mm/dd): Start: 1977-04-01, End: 1977-04-01
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Gonyaulax tamarensis var. excavata Braarud 1945 ( cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: From then on, monitoring was carried out in the areas affected by the cloud, reporting the presence of dinoflagellates: G. catenatum, Alexandrium tamarense, Cochlodinium sp., Ceratium furca, Dinophysis cf. acuminata, G. polygramma, P. gracilis, Polykrikos polikrikoides among other diatom species in water samples.
Event-related bibliography: La Barbera-Sánchez A, Soler JF, Rojas De Astudillo L, Chang-Yen I. 2004. Paralytic Shellfish Poisoning (PSP) in Margarita Island, Venezuela. Rev. Biol. Trop. 52:89-98.

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
Kit used: Type of kit used:
Additional information:
Economic losses:
Management decision:
Additional harmful effect information:
Created at 09:23 on 6 Jun 2018
Updated at 03:03 on 4 Dec 2021