General Information

Event name: MX-15-001
Country: MEXICO
Nature of the harmful event:
Water Discoloration , High Phyto concentration , Seafood toxins , Mass mortalities
Event directly affected:
Planktonic life , Natural Fish , Birds , Shellfish , Aquatic Mammals
Toxicity detected: Yes
Associated syndrome: PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (Mareas Rojas (COFEPRIS))
Event occurred before in this location: Yes
Individuals to contact: Rosalba Alonso Rodriguez , Ernesto García Mendoza/Jennifer Medina-Elizalde

Location & Date

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Location: Latitude: 30.649722, Longitude: -114.566667
General location information: San Felipe Puertecitos, Puerto de San Felipe y Alto Golfo de California, Baja California
HAB Area code(s): MEX-GC-1
Additional location information: From Puertecitos to the upper Gulf of California
Bloom event dates (yyyy/mm/dd): Event Date:2015-01-13
Start: 2015-01-13, End: 2015-02-24
Quarantine levels dates (yyyy/mm/dd): First detection: 2015-01-14, End: 2015-06-14
Additional date-related information: staggered sanitary closure


Causative organism known: Yes
Causative Species/Genus: Gymnodinium catenatum Graham 1943 (152,000 cells/L)
Medina Elizalde et al. (2018)
Gymnodinium catenatum (190,000 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. 2015. Medina-Elizalde J, García-Mendoza E, Turner AD, Sánchez-Bravo YA, Murillo-Martínez R (2018). Transformation and Depuration of Paralytic Shellfish Toxins in the Geoduck Clam Panopea globosa From the Northern Gulf of California. Front. Mar. Sci. 5:335. Doi 10.3389/fmars.2018.00335

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
Panopea globosa Saxitoxins STX eq 16,740 LC-FD
Panopea globosa Saxitoxins STX eq 429 ug STX eq. /kg LC-FD
Kit used: Type of kit used:
Additional information: HPLCPCOX and HILIC-MS/MS
Economic losses: not evaluated
Management decision: sanitary closure staggered by polygons
Additional harmful effect information: Death of 550 marine birds, 4 sea lions, ducks, pelicans and 6 ton of bivalve molluscs confiscated
Created at 11:29 on 3 Jan 2019
Updated at 06:57 on 6 Dec 2021