General Information

Event name: US-24-024
Country: UNITED STATES
Nature of the harmful event:
Seafood toxins
Event directly affected:
Shellfish
Toxicity detected: Yes (Approximate range: 2458µg/100g)
Associated syndrome: PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (MA DMF Biotoxin Monitoring Program)
Event occurred before in this location: Yes (Annually)
Individuals to contact: O'NEIL, Terry

Location & Date

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Location: Latitude: , Longitude:
General location information: Salt Pond, Nauset Estuary, Cape Cod, MA
HAB Area code(s): US-06
Additional location information: 1540 acre Estuary system Closed entire estuary (dsga OC2-OC6) to shellfishing 3/19/24 - 6/12/24
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd): First detection: 2024-03-11, End: 2024-06-03
Additional date-related information:

Microalgae

Causative organism known: Yes
Causative Species/Genus: Alexandrium catenella ( 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: Whole column
Growth:
In situ
Growth Comments
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Shellfish Saxitoxins 2458 ug/100g Bioassay-Mouse
Kit used: No Type of kit used:
Additional information:
Economic losses:
Management decision: All commercial and recreational shellfishing closed for over 90 days
Additional harmful effect information:
Created at 02:50 on 11 Apr 2025
Updated at 02:51 on 11 Apr 2025
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