General Information

Event name: MX-16-009
Country: MEXICO
Nature of the harmful event:
Water Discoloration , High Phyto concentration , Mass mortalities
Event directly affected:
Planktonic life , Natural Fish
Toxicity detected: Yes (Approximate range: not reported)
Associated syndrome: ASP , NSP , Aerosolized toxins effects
Unexplained toxicity: No
Species implicated in toxin transmission (transvector): There were no poisonings or human deaths
Report the outcome of a monitoring programme: Yes (Mareas Rojas (COFEPRIS))
Event occurred before in this location: Yes (The regularity is not known, however it occurs some years and others not)
Individuals to contact: Rosalba Alonso Rodriguez , COFEPRIS

Location & Date

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Location: Latitude: 25.879444, Longitude: -97.504444
General location information: Matamoros, Tamaulipas, north of Gulf of Mexico
HAB Area code(s): GM
Additional location information: In coastal zone, front to Matamoros City in Tamaulipas State, Mexico
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd): First detection: 2016-09-23, End: 2016-11-01
Additional date-related information: the sanitary closure was implemented


Causative organism known: Yes
Causative Species/Genus: Karenia brevis (40,000 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: Comisión Federal para la Protección contra Riesgos Sanitarios. 2016.

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: not reported
Economic losses: Yes. by closure for extraction and sale of fish, but they were not evaluated
Management decision: sanitary closure > 1 month
Additional harmful effect information: 45 ton of death fishes
Created at 12:38 on 4 Jan 2019
Updated at 07:13 on 23 Nov 2021