| Event name: | US-90-004 | |
| Country: | UNITED STATES | |
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Nature of the harmful event: |
Seafood toxins | |
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Event directly affected: |
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| Toxicity detected: | Yes | |
| Associated syndrome: | PSP | |
| Unexplained toxicity: | No | |
| Species implicated in toxin transmission (transvector): | ||
| Report the outcome of a monitoring programme: | Yes | |
| Event occurred before in this location: | Yes (Annual event in most years since 1972, ususally in May/June.) | |
| Individuals to contact: | ANDERSON, Donald M. | |
| Location: | Latitude: , Longitude: | |
| General location information: |
Massachusetts Bay, North Shore HAB Area code(s): US-04 |
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| Additional location information: | ||
| Bloom event dates (yyyy/mm/dd): | Start: 1990-05-15, End: 1990-07-15 | |
| Quarantine levels dates (yyyy/mm/dd): | ||
| Additional date-related information: | Last 2 weeks of May through mid-July | |
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Alexandrium fundyense
( cells/L)
Alexandrium tamarense ( cells/L) |
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| Co-Ocurring Species/Genus: | ||
| Chlorophyll concentration, if known: | µg/l | |
| Additional bloom information: | Alexandrium fundyense and/or A. tamarense (variety not determined). Cell numbers 500-2500 cells/liter. | |
| Event-related bibliography: | ||
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| Nutrient information: | ||||||||||||||||||||||||||
| Temperature Range During Event: | Max: 11 °C, Min: 8 °C | |||||||||||||||||||||||||
| Salinity Range During Event: | Max: 31, Min: 29 | |||||||||||||||||||||||||
| Bloom location in the water column: | ||||||||||||||||||||||||||
| Growth: | Advected | |||||||||||||||||||||||||
| Growth Comments | Advection from the North is the most likely cause of toxicity. Population originated near Kennebec River in Maine during early April. Growth probably also occurred during transit to the South. | |||||||||||||||||||||||||
| Additional Environmental information: | Salinity front along coast (29-31‰) caused by freshwater plume from further North (i.e., Merrimac and Kennebec Rivers. Slightly stratified due to buoyant plume; waters 1-2º C warmer and 2‰ less saline than surrounding ambient waters. | |||||||||||||||||||||||||
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| Kit used: | Type of kit used: | ||||||
| Additional information: | |||||||
| Economic losses: | |||||||
| Management decision: | Mytilus edulis, Mya arenarai and other species closed to shellfishing from late May to mid-August. | ||||||
| Additional harmful effect information: | Shellfish closures Toxic level 200-300 µg/100 g shellfish (mouse bioassay: MA Division of Marine Fisheries) No human deaths or illnesses known. | ||||||
