General Information

Event name: IND-67-001
Country: INDIA
Nature of the harmful event:
Water Discoloration , High Phyto concentration
Event directly affected:
Toxicity detected: No
Associated syndrome:
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: No
Event occurred before in this location:
Individuals to contact: QUOD, Jean-Pascal , SCHWEIBOLD Laura

Location & Date

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Location: Latitude: , Longitude:
General location information: Waltair, Waltair
HAB Area code(s): IN-03
Additional location information:
Bloom event dates (yyyy/mm/dd): Event Date:1967-04-20
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Asterionella sp. ( cells/L)
Asterionella japonica
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: Rao, D. S. (1969). ASTERIONELLA JAPONICA BLOOM AND DISCOLORATION OFF WALTAIR, BAY OF BENGAL 1. Limnology and Oceanography, 14(4), 632-634.

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:
Management decision:
Additional harmful effect information: bloom was about 5 km long and 1 km wide, gradually disapeared in 2 days
Created at 04:29 on 6 Nov 2020
Updated at 04:30 on 6 Nov 2020