General Information

Event name: US-19-005
Nature of the harmful event:
Water Discoloration , High Phyto concentration , Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 63 to >352 µg/kg)
Associated syndrome: DSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (The Ecology and Oceanography of Harmful Algal Blooms)
Event occurred before in this location: Yes
Individuals to contact: Young, Craig

Location & Date

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Location: Latitude: , Longitude:
General location information: South shore (Shinnecock Bay), NY
HAB Area code(s): US-08
Additional location information:
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd): First detection: 2019-07-11, End: 2019-07-18
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Dinophysis acuminata (10500 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: 32.87 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: 28.8 °C, Min: 4.8 °C
Salinity Range During Event: Max: 29.6, Min: 1.4
Bloom location in the water column:
In situ
Growth Comments
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Dinophysis acuminata Okadaic Acid >352 μg/kg ELISA
Kit used: Yes Type of kit used: Abraxis Okadaic Acid (PP2A), Microtiter Plate
Additional information: Toxin was collected by use of solid-phase adsorption toxin tracking (SPATT) samplers filled with Diaion™ HP20 resin. The PP2A kit used to quantify concentrations of okadaic acid has maximum and minimum detectable concentrations of 352 and 63 μg/kg, respectively.
Economic losses:
Management decision: It should be noted that detection of DSP in shellfish resulted in the closure of the entirety of Old Fort Pond (~80 acres) to the harvesting of shellfish and carnivorous gastropods on 11-July-2019. This closure was rescinded on 18-July-2019.
Additional harmful effect information:
Created at 06:58 on 10 Feb 2020
Updated at 07:01 on 10 Feb 2020