| Event name: | US-17-006 | |
| Country: | UNITED STATES | |
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Nature of the harmful event: |
High Phyto concentration | |
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Event directly affected: |
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| Toxicity detected: | Yes (Approximate range: 0-5.7ppm) | |
| Associated syndrome: | ||
| Unexplained toxicity: | No | |
| Species implicated in toxin transmission (transvector): | ||
| Report the outcome of a monitoring programme: | Yes (DMF Phytoplankton monitoring & Jefferson Turner's Lab (UMASS) Buzzards Bay Phytoplankton) | |
| Event occurred before in this location: | Yes | |
| Individuals to contact: | HICKEY, Mike , O'NEIL, Terry | |
| Location: | Latitude: , Longitude: | |
| General location information: |
Buzzards Bay, Nantucket Sound ++, HAB Area code(s): US-07 |
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| Additional location information: | ||
| Bloom event dates (yyyy/mm/dd): | ||
| Quarantine levels dates (yyyy/mm/dd): | ||
| Additional date-related information: | ||
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Pseudo-nitzschia sp.
(434000 cells/L)
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| Co-Ocurring Species/Genus: | ||
| Chlorophyll concentration, if known: | µg/l | |
| Additional bloom information: | During this event DMF sent splits of all phytoplankton samples to Kate Hubbard, Ph.D. at the Florida Fish and Wildlife Conservation Commission, for species composition and quantitative toxin analyses. The results of her toxin analyses indicated extremely low levels of domoic acid in the phytoplankton. Results from Kate’s genetic species composition analyses showed that Massachusetts waters were dominated by Pseudo-nitzschia species that are not generally highly toxic. However, it is noteworthy that the species P. australis, which is known to be highly toxigenic, was identified for the first time in Massachusetts waters. | |
| Event-related bibliography: | ||
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| Nutrient information: | ||||||||||||||||||||||||||
| Temperature Range During Event: | Max: °C, Min: °C | |||||||||||||||||||||||||
| Salinity Range During Event: | ||||||||||||||||||||||||||
| Bloom location in the water column: | Whole column | |||||||||||||||||||||||||
| Growth: | ||||||||||||||||||||||||||
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| Kit used: Yes | Type of kit used: Scotia | |||||||||||
| Additional information: | Positive Scotia Kit tests of phytoplankton samples led to additional screening of shellfish meats (Blue Mussels and Oysters). All meats tested negative with the kits except two BM samples from Chilmark. DMF followed up on the two "positive" mussel samples with HPLC screening at the Rhode Island State Health Lab. The mussels came back with DA levels of 5.6 and 5.7 ppm. Mussels from these locations were retested a week later with HPLC and no DA was found. | |||||||||||
| Economic losses: | None | |||||||||||
| Management decision: | No closures were enacted during this bloom event in MA waters | |||||||||||
| Additional harmful effect information: | ||||||||||||
