| Event name: | US-93-018 | |
| Country: | UNITED STATES | |
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Nature of the harmful event: |
Mass mortalities | |
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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 (Chronic annual blooms.) | |
| Individuals to contact: | OLSEN, Paul | |
| Location: | Latitude: , Longitude: | |
| General location information: |
Raritan Bay, Cliffwood Beach to E. Keansburg, New Jersey. HAB Area code(s): US-09 |
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| Additional location information: | Raritan Bay south shore, Cliffwood Beach to E. Keansburg, especially dense in Keyport Harbor; also extending in lesser intensity, from Sandy Hook Bay along New Jersey coast to about Long Branch, with highest density at Sea Bright. | |
| Bloom event dates (yyyy/mm/dd): | Start: 1993-07-20, End: 1993-07-23 | |
| Quarantine levels dates (yyyy/mm/dd): | ||
| Additional date-related information: | A few lesser blooms of same species reocurred in the bay during August. | |
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Katodinium rotundatum
(100,000,00 cells/L)
Dominant species |
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| Co-Ocurring Species/Genus: |
Olisthodiscus luteus
(5,000,000 cells/L)
Subdominant species Euglena sp. (5,000,000 cells/L) Euglena/Eutrepia spp. Subdominant species Chroomonas spp. ( cells/L) |
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| Chlorophyll concentration, if known: | Concurrent Chlª concentrations exceed 50 µg/L µg/l | |
| Additional bloom information: | Several other species present around 1,000,000 cell/L. | |
| Event-related bibliography: | ||
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| Nutrient information: | ||||||||||||||||||||||||||
| Temperature Range During Event: | Max: 24 °C, Min: 21 °C | |||||||||||||||||||||||||
| Salinity Range During Event: | Max: 29, Min: 17 | |||||||||||||||||||||||||
| Bloom location in the water column: | ||||||||||||||||||||||||||
| Growth: |
In situ |
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| Growth Comments | ||||||||||||||||||||||||||
| Additional Environmental information: | Salinity usually 22.3 - 25.5 ‰ ; dissolved oxygen usually supersaturated in blooms (10.9 - 15.9 mg/L) otherwise 6 -10 mg/L, but a low value of 3.6 mg/L associated with fishkill (see attached). Water column usually mixed although apparent lack of mixing c | |||||||||||||||||||||||||
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| Kit used: No | Type of kit used: | ||||||
| Additional information: | |||||||
| Economic losses: | |||||||
| Management decision: | Increased surveillance by NJDEP and USEPA: The Monmouth County Health Department in 1992 initiated a monitoring/sampling program for red tide; they acquired a Coast Guard Search & Rescue (30 ft) vessel which is necely adapted for marine biological work an | ||||||
| Additional harmful effect information: | |||||||
