| Event name: | US-98-006 | |
| Country: | UNITED STATES | |
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Nature of the harmful event: |
Water Discoloration | |
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Event directly affected: |
Shellfish | |
| Toxicity detected: | No | |
| Associated syndrome: | OTHER | |
| Unexplained toxicity: | No | |
| Species implicated in toxin transmission (transvector): | ||
| Report the outcome of a monitoring programme: | Yes | |
| Event occurred before in this location: | Yes (The bloom was present throughout the entire Peconic system from 1985 through 1987, with densities occasionally exceeding 1,000,000 cells/ml. Cell numbers declined through 1988 and 1989, and were generally undetectable during 1990 with the exception of those from West Neck Bay. During 1991, densities of up to 2,000,000 cells/ml occurred in Flanders Bay and West Neck Bay. During 1992, numbers approached 850,000 cells/ml in Coecles Harbor and 1,000,000 cells/ml in West Neck Bay. It occurred briefly in May of 1994 in Flanders Bay (up to 14,000) cells/ml) and in Great Peconic Bay (11,000 cells/ml). During 1995 concentrations exceeded 1,000,000 cells/ml at 12 of 31 stations sampled, with a peak value of 1,7 00,000) recorded in July. During 1997, concentrations ranged from 1,600) to 380,000.) | |
| Individuals to contact: | NUZZI, Robert | |
| Location: | Latitude: , Longitude: | |
| General location information: |
West Neck Bay, Shelter Island, New York. HAB Area code(s): US-08 |
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| Additional location information: | Located within the Peconic Estuary System, on the eastern end of Long Island, New York. | |
| Bloom event dates (yyyy/mm/dd): | ||
| Quarantine levels dates (yyyy/mm/dd): | ||
| Additional date-related information: | late May to mid-July . | |
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Aureococcus anophagefferens
(50,000,000 cells/L)
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| Co-Ocurring Species/Genus: | ||
| Chlorophyll concentration, if known: | µg/l | |
| Additional bloom information: | The organism was also present in other locations in the Peconic estuary, but at much lower concentrations. | |
| Event-related bibliography: | ||
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| Nutrient information: | ||||||||||||||||||||||||||
| Temperature Range During Event: | Max: 26 °C, Min: 20 °C | |||||||||||||||||||||||||
| Salinity Range During Event: | Max: 27, Min: 25 | |||||||||||||||||||||||||
| Bloom location in the water column: | ||||||||||||||||||||||||||
| Growth: |
In situ |
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| Growth Comments | ||||||||||||||||||||||||||
| Additional Environmental information: | Dissolved oxygen: 5.4 - 8.7 mg/L | |||||||||||||||||||||||||
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| Kit used: No | Type of kit used: | ||||||
| Additional information: | |||||||
| Economic losses: | |||||||
| Management decision: | Continue weely monitoring program. | ||||||
| Additional harmful effect information: | Impacts on various shellfish species (scallops, hard clams & mussels) and on submerged aquatic vegetation (eelgrass) have previously been reported. Other effects are aesthetic - water discoloration and reduced transparency. | ||||||
