General Information

Event name: US-19-004
Nature of the harmful event:
Water Discoloration , High Phyto concentration , Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: >80 μg per 100 g wet shellfish tissue)
Associated syndrome: PSP
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: North shore (Northport Harbor, Steer\'s Canal), Peconic Estuary (Terry Creek, Meetinghouse Creek), NY
HAB Area code(s): US-08
Additional location information: The affected areas cover over 100 km of shoreline within multiple estuaries
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd): First detection: 2019-05-02, End: 2019-05-28
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Alexandrium fundyense (756 cells/L)
For Northport Harbor and Steer's Canal
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: North: 19.8, Peconic: 6.5 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: North: 27.8, Peconic: 28.8 °C, Min: North: 4.8, Peconic: 4.9 °C
Salinity Range During Event: Max: North: 25.7, Peconic: 27.5, Min: North: 15.2, Peconic: 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
Kit used: No Type of kit used:
Additional information:
Economic losses:
Management decision: PSP in shellfish >80 μg per 100 g wet shellfish tissue resulted in closures of over 500 acres to the harvest of carnivorous gastropods in Northport Harbor and Steers Canal 5/16/19, as well as 102 acres in Terry and Meetinghouse creek on 5/2/19
Additional harmful effect information:
Created at 04:03 on 10 Feb 2020
Updated at 05:02 on 8 Apr 2020