General Information

Event name: MX-09-001
Country: MEXICO
Nature of the harmful event:
Water Discoloration , Freshwater
Event directly affected:
Planktonic life , Natural Fish
Toxicity detected: Yes (Approximate range: CYN <21ngl-1; STXs 5ngl-1)
Associated syndrome: PSP , Cyanobacterial toxins effects
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: No
Event occurred before in this location:
Individuals to contact: Rosalba Alonso Rodriguez

Location & Date

[View larger map]
Location: Latitude: 18.399722, Longitude: -95.066667
General location information: Catemaco lake, Veracruz
HAB Area code(s): GM
Additional location information: Fresh water.
Bloom event dates (yyyy/mm/dd): Event Date:2009-10-12
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Cylindrospermopsis sp. ( cells/L)
C. catemaco
Co-Ocurring Species/Genus: Cyclotella sp. ( cells/L)
C. philippinensis
Chlorophyll concentration, if known: 23-89 µg/l
Additional bloom information:
Event-related bibliography: J.P. Berry , A. Jaja-Chimedza , L. Dávalos-Lind & O. Lind (2012) Apparent bioaccumulation of cylindrospermopsin and paralytic shellfish toxins by finfish in Lake Catemaco (Veracruz, Mexico), Food Additives & Contaminants: Part A, 29:2, 314-321, DOI: 10.1080/19440049.2011.597785

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: Oxygen content (nL/L): Wind velocity:
Temperature (°C): 25 Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity:
Nutrient information:
Temperature Range During Event: Max: 28 °C, Min: 23 °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
Cylindrospermopsis philippinensis Cylindrospermopsin Cylindrospermopsin <21 ngl-1 ELISA
Cylindrospermopsis catemaco Saxitoxins STX 5 ngl-1 ELISA
Kit used: Type of kit used:
Additional information:
Economic losses:
Management decision:
Additional harmful effect information:
Created at 05:29 on 3 Feb 2018
Updated at 05:35 on 3 Feb 2018