General Information

Event name: US-16-029
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 0-1204 g/100g)
Associated syndrome: PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (Massachusetts DMF Biotoxin Monitoring Program)
Event occurred before in this location: Yes
Individuals to contact: HICKEY, Mike , O'NEIL, Terry

Location & Date

[View larger map]
Location: Latitude: , Longitude:
General location information: Nauset Estuary, Orleans and Eastham MA, MA
HAB Area code(s): US-05
Additional location information: Entire estuary closed to shellfishing 4/6/16 through 5/27/16, a portion (Salt Pond) remaineed closed until 6/23/16.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd): First detection: 2016-04-06, End: 2016-06-23
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Alexandrium sp. ( 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:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Blue Mussels Saxitoxins 1204 g/100g Bioassay-Mouse
Kit used: No Type of kit used:
Additional information: Mouse - DMF Lab
Economic losses: Commercial and recreational shellfisheries in Nauset estuary closed for 51 days. Recreational shellfisheries in Salt pond closed for 76 days.
Management decision: Entire estuary (OC:2-OC:6) closed to shellfishing 4/6/16 through 5/27/16, Salt Pond (OC:6) closed to shellfishing 4/6/16 through 6/23/16.
Additional harmful effect information:
Created at 06:23 on 23 Mar 2017