Harmful Algal Information System: Event US-19-017

General Information

Event name:	US-19-017
Country:	UNITED STATES
Nature of the harmful event:	Water Discoloration , High Phyto concentration , Seafood toxins
Event directly affected:
Toxicity detected:	Yes (Approximate range: 79ug/100g)
Associated syndrome:	PSP
Unexplained toxicity:	No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme:	Yes (FWC/FWRI HAB Monitoring Program)
Event occurred before in this location:	Yes (Annually)
Individuals to contact:	HUBBARD, Katherine

Location & Date

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Location:	Latitude: , Longitude:
General location information:	Indian River Lagoon, Mosquito Lagoon, East Coast of Florida HAB Area code(s): US-15
Additional location information:	Lagoons
Bloom event dates (yyyy/mm/dd):	Start: 2019-05-15, End: 2019-10-16
Quarantine levels dates (yyyy/mm/dd):	First detection: 2019-06-25, End: 2019-10-10
Additional date-related information:

Microalgae

Causative organism known:	Yes
Causative Species/Genus:	Pyrodinium bahamense (1,557,768 cells/L) PSP producer
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:

Surface

Growth:

In situ

Growth Comments

we did not conduct subsurface sampling but the bloom was likely distributed throughout the water column

Additional Environmental information:

Toxin Assay Information

Species containing the toxin	Toxin type	Toxin details	Max. concentration	Assay type
Crasseotrea virginica (Eastern oyster)	Saxitoxins		79ug/100g	Bioassay-Mouse

Kit used: Yes

Type of kit used: Neogen

Additional information:

Economic losses:

Management decision:

shellfish harvest closures were initiated as a result of toxin detection and did not reopen until 10/10/2019, when bloom conditions had largely improved

Additional harmful effect information:

Created at 04:38 on 8 Apr 2020