| Event name: | US-16-026 | |
| Country: | UNITED STATES | |
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Nature of the harmful event: |
Water Discoloration , High Phyto concentration | |
|
Event directly affected: |
Natural Fish , Shellfish | |
| Toxicity detected: | No | |
| Associated syndrome: | ||
| Unexplained toxicity: | ||
| Species implicated in toxin transmission (transvector): | ||
| Report the outcome of a monitoring programme: | Yes (VIMS HAB Monitoring Program) | |
| Event occurred before in this location: | Yes | |
| Individuals to contact: | REECE, kimberly | |
| Location: | Latitude: , Longitude: | |
| General location information: |
Mobjack Bay and York River, Chesapeake Bay HAB Area code(s): US-10 |
|
| Additional location information: | Mobjack Bay into the Chesapeake Bay into the York River extending to the Naval Weapon Station. First seen at bloom levels (>1,000,000 cells/L) on August 17, 2016; last seen at bloom levels in this region on September 23, 2016 | |
| Bloom event dates (yyyy/mm/dd): | Start: 2016-08-17, End: 2016-09-23 | |
| Quarantine levels dates (yyyy/mm/dd): | ||
| Additional date-related information: | ||
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Alexandrium monilatum
(119,772,000 cells/L)
|
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| Co-Ocurring Species/Genus: |
Cochlodinium polykrikoides
(500,000 cells/L)
|
|
| Chlorophyll concentration, if known: | up to 616 ug/l on August 23, 2016 µg/l | |
| Additional bloom information: | C. polykrikoides was co-occurring at the start of the bloom. There was no other co-occuring dominant species until the bloom started subsiding at which point Pheopolykrikos hartmannii was present at concentrations up to 98,000 cells/L | |
| Event-related bibliography: | ||
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| Nutrient information: | ||||||||||||||||||||||||||
| Temperature Range During Event: | Max: 34 °C, Min: 25 °C | |||||||||||||||||||||||||
| Salinity Range During Event: | Max: 24, Min: 20 | |||||||||||||||||||||||||
| Bloom location in the water column: |
Surface Subsurface |
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| Growth: |
In situ |
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| Growth Comments | ||||||||||||||||||||||||||
| Additional Environmental information: | pH 8.4; extracted CHLa 616.3 for 8/23/16 sample listed above | |||||||||||||||||||||||||
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| Kit used: No | Type of kit used: | ||||||
| Additional information: | |||||||
| Economic losses: | Oyster spat loss of entire stock for one grower. Another grower experienced ~67% mortality in a group of diploid oysters grown intertidally, while those in the same group grown subtidally suffered ~22% mortality. | ||||||
| Management decision: | |||||||
| Additional harmful effect information: | |||||||
