General Information

Event name: MYT-98-001
Country: MAYOTTE
Nature of the harmful event:
High Phyto concentration , Other ( suspected to affect the food chain)
Event directly affected:
Toxicity detected: No
Associated syndrome: CFP (Ciguatera Fish Poisoning)
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (Mayotte ciguatera monitoring programme)
Event occurred before in this location: Yes (monitoring started in 1999)
Individuals to contact: QUOD, Jean-Pascal

Location & Date

[View larger map]
Location: Latitude: -12.640833, Longitude: 45.132500
General location information: Surprise inner reef,
HAB Area code(s): MYT-01
Additional location information: lagoonal inner reef
Bloom event dates (yyyy/mm/dd): Event Date:1998-12-11
Start: 1998-10-30, End: 1998-12-18
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Gambierdiscus sp. ( cells/L)
Co-Ocurring Species/Genus: Ostreopsis sp. ( cells/L)
Prorocentrum spp. ( cells/L)
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: Turquet et al (2000), link:

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:
Economic losses: consumers sensitizd to the risk of ciguatera to occur in months followwing the bloom.
Management decision: controls of food chain and commercial species
Additional harmful effect information:
Created at 11:39 on 27 Sep 2017