General Information

Event name: MX-79-001
Country: MEXICO
Nature of the harmful event:
High Phyto concentration , Mass mortalities
Event directly affected:
Planktonic life , Natural Fish , Shellfish , Humans
Toxicity detected: Yes
Associated syndrome: PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector): Crassostrea iridescens and Donax sp.
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: 23.222222, Longitude: -106.461389
General location information: Mazatlan, Sinaloa
HAB Area code(s): GCS
Additional location information:
Bloom event dates (yyyy/mm/dd): Event Date:1979-04-23
Start: 1979-04-21, End: 1979-04-25
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Gymnodinium catenatum (6.6 x 10^6 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: 176 µg/l
Additional bloom information:
Event-related bibliography: Mee, L. D., Espinosa, M., Diaz, G. 1985. Paralytic shellfish poisoning with a Gymnodinium catenatum red tide on the Pacific Coast of Mexico. Marine Environmental Research. 19: 77-92

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
Saxitoxins STX eq 5093 ug / 100g Bioassay-Mouse
Kit used: No Type of kit used:
Additional information: AOAC, 1965.
Economic losses:
Management decision:
Additional harmful effect information:
Created at 07:51 on 3 Feb 2018