General Information

Event name: MX-97-001
Country: MEXICO
Nature of the harmful event:
High Phyto concentration
Event directly affected:
Planktonic life , Shellfish
Toxicity detected: Yes (Approximate range: >35 ug 100-1 STX)
Associated syndrome: PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector): Ostrea iridescens
Report the outcome of a monitoring programme: No
Event occurred before in this location: Yes
Individuals to contact: Rosalba Alonso Rodriguez

Location & Date

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Location: Latitude: 23.185833, Longitude: -106.426667
General location information: Bahia Mazatlán, Sinaloa
HAB Area code(s): GCS
Additional location information:
Bloom event dates (yyyy/mm/dd): Event Date:1999-03-25
Start: 1999-03-08, End: 1999-05-30
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Gymnodinium catenatum (5,000 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: Ramírez-Camarena, C., Cortés-Altamirano, R., Muñoz-Cabrera, L. 1999. Mareas rojas provocadas por el dinoflagelado Gymnodinium catenatum (Gymnodiniales: Gymnodiniaceae) en la bahía de Mazatlán, Sin., México, en 1997. Rev. Biol. Trop., 47 (Supl. 1): 77-80.

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
Gymnodinium catenatum Saxitoxins 35 ug/100 g tissue Bioassay-Mouse
Kit used: Type of kit used:
Additional information:
Economic losses:
Management decision:
Additional harmful effect information:
Created at 05:59 on 18 Jul 2018
Updated at 07:55 on 19 Jan 2019