| Event name: | US-94-013 | |
| 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: | No | |
| Associated syndrome: | ||
| Unexplained toxicity: | No | |
| Species implicated in toxin transmission (transvector): | ||
| Report the outcome of a monitoring programme: | Yes | |
| Event occurred before in this location: | Yes (Occurs annually in very predictable pattern in coastal zone with large blooms in April (based on five-year data). Occurrence in estuary less predictable (based on two-ywar data). Historical data indicate presence in high numbers back to 1950s.) | |
| Individuals to contact: | DORTCH, Quay | |
| Location: | Latitude: , Longitude: | |
| General location information: |
Louisiana continental shelf and estuaries., Louisiana. HAB Area code(s): US-17 |
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| Additional location information: | ||
| Bloom event dates (yyyy/mm/dd): | ||
| Quarantine levels dates (yyyy/mm/dd): | ||
| Additional date-related information: | All seasons sampled (March-October), peak concentrations occurred in April and October. | |
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Pseudo-nitzschia spp.
(10,000,000 cells/L)
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| Co-Ocurring Species/Genus: | ||
| Chlorophyll concentration, if known: | µg/l | |
| Additional bloom information: | Pseudonitzschia spp., present in 64% of samples collected in shelf and estuarine areas. Species not generally identified, but earlier studies have identified P. multiseries, P. pungens and P. pseudodelicatissima. | |
| Event-related bibliography: | ||
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| Nutrient information: | ||||||||||||||||||||||||||
| Temperature Range During Event: | Max: 32 °C, Min: 9 °C | |||||||||||||||||||||||||
| Salinity Range During Event: | Max: 36, | |||||||||||||||||||||||||
| Bloom location in the water column: | ||||||||||||||||||||||||||
| Growth: |
In situ |
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| Growth Comments | ||||||||||||||||||||||||||
| Additional Environmental information: | Most abundant at 22-32‰, and at 21º C. Occurs more frequently and at higher concentrations in coastal zone in comparison with estuary. Blooms in moderately well-mixed water. | |||||||||||||||||||||||||
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| Kit used: No | Type of kit used: | ||||||
| Additional information: | |||||||
| Economic losses: | |||||||
| Management decision: | None. | ||||||
| Additional harmful effect information: | No monitoring for effects. | ||||||
