General Information

Event name: US-17-021
Nature of the harmful event:
Mass mortalities
Event directly affected:
Natural Fish , Birds , Aquatic Mammals
Toxicity detected: No
Associated syndrome:
Unexplained toxicity: Yes (Possible botulism caused by Low oxygen in the lagoon area)
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: No
Event occurred before in this location: No
Individuals to contact: Schuster, Robert

Location & Date

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Location: Latitude: , Longitude:
General location information: Beach Haven West, NJ
HAB Area code(s): US-09
Additional location information: One lagoon area in the lagoon community, other lagoons clear
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: August 4,2017


Causative organism known: Yes
Causative Species/Genus: Chattonella spp. (400000000 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography:

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: Dead end lagoon poor flushing, warm and shallow water

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: Yes Type of kit used: Abraxis
Additional information: NJ Fish and wildlife suspected botulism due to shallow warm water with low oxygen, their pathology results were inconclusive, so we tested the GI tract and livers of 2 birds for brevetoxin, results were negative.
Economic losses:
Management decision: Tested for toxin and collected additional water samples to monitor the nearest shellfish waters, bloom turned out to be isolated to a small lagoon area.
Additional harmful effect information:
Created at 09:49 on 23 Apr 2018
Updated at 02:54 on 6 Feb 2020