Harmful Algal Information System: Event US-19-022

General Information

Event name:	US-19-022
Country:	UNITED STATES
Nature of the harmful event:	High Phyto concentration
Event directly affected:	Shellfish
Toxicity detected:	Yes (Approximate range: 0.81 - 22.24 ug/g)
Associated syndrome:	ASP
Unexplained toxicity:	No
Species implicated in toxin transmission (transvector):	Mya arenaria, Mytilus edulis, Eastern oysters (Crassostrea)
Report the outcome of a monitoring programme:	Yes (Maine Department of Marine Resources Biotoxin Program)
Event occurred before in this location:	Yes
Individuals to contact:	Lewis, Bryant

Location & Date

[View larger map]

Location:	Latitude: , Longitude:
General location information:	Maine Coastline, HAB Area code(s): US-01
Additional location information:
Bloom event dates (yyyy/mm/dd):	Start: 2019-09-16, End: 2019-12-16
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:	Low levels first detected in August

Microalgae

Causative organism known:	Yes
Causative Species/Genus:	Pseudo-nitzschia spp. (63,750 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:

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:

Bloom coincided with the tail end of PSP bloom: Surf clams closed 5/1/19. Razor clams closed 6/21/19. Soft shell clams closed 7/1/19 until 8/19/19. Razor and surf clams reopened 12/20/19.

Additional harmful effect information:

Created at 08:45 on 8 Apr 2020