General Information

Event name: MX-19-001
Country: MEXICO
Nature of the harmful event:
Seafood toxins , Mass mortalities
Event directly affected:
Shellfish
Toxicity detected: Yes (Approximate range: > 0.8 mg STX eq./kg oyster)
Associated syndrome: PSP
Unexplained toxicity:
Species implicated in toxin transmission (transvector): clam
Report the outcome of a monitoring programme: No
Event occurred before in this location: Yes (2010, 2011, 2012, 2013, 2014, 2016)
Individuals to contact: Rosalba Alonso Rodriguez

Location & Date

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Location: Latitude: 15.695556, Longitude: -97.109167
General location information: Pinotepa Nacional to Huatulco, Oaxaca
HAB Area code(s): PM
Additional location information: Mexican Tropical Pacific PM and Gulf of Tehuantepec GT, aprox. 300 km of coastal line
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd): First detection: 2019-12-18, End: 2020-02-15
Additional date-related information:

Microalgae

Causative organism known: Yes
Causative Species/Genus: Pyrodinium bahamense ( cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://www.gob.mx/cms/uploads/attachment/file/787629/Vedas_Sanitarias_Florecimientos_Algales_Nocivos_2019.pdf

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:
Growth Comments
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Saxitoxins Bioassay-Mouse
Kit used: Type of kit used:
Additional information: Official Method
Economic losses: Not determnated
Management decision: Sanitary closure
Additional harmful effect information: 4 cases of human poisoning
Created at 01:55 on 21 Feb 2023
Updated at 09:10 on 26 Feb 2023
IOC/UNESCO ISSHA
IOC/UNESCO ICES PICES