Event name: | NZ-04-002 | |
Country: | NEW ZEALAND | |
Nature of the harmful event: |
High Phyto concentration , Mass mortalities | |
Event directly affected: |
Shellfish | |
Toxicity detected: | No | |
Associated syndrome: | ||
Unexplained toxicity: | ||
Species implicated in toxin transmission (transvector): | ||
Report the outcome of a monitoring programme: | Yes (National Marine Biotoxin Monitoring Program) | |
Event occurred before in this location: | ||
Individuals to contact: | RHODES Lesley |
Location: | Latitude: -36.290556, Longitude: 174.802778 | |
General location information: |
Leigh, North Island HAB Area code(s): NZ-02 |
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Additional location information: | ||
Bloom event dates (yyyy/mm/dd): |
Event Date:2004-02-18 |
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Quarantine levels dates (yyyy/mm/dd): | ||
Additional date-related information: |
Causative organism known: | Yes | |
Causative Species/Genus: |
Ostreopsis siamensis Schmidt 1901
( cells/L)
1406 * 10^-3 g/FW |
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Co-Ocurring Species/Genus: | ||
Chlorophyll concentration, if known: | µg/l | |
Additional bloom information: | ||
Event-related bibliography: | Shears, N. T., & Ross, P. M. (2009). Blooms of benthic dinoflagellates of the genus Ostreopsis; an increasing and ecologically important phenomenon on temperate reefs in New Zealand and worldwide. Harmful algae, 8(6), 916-925. |
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Nutrient information: | ||||||||||||||||||||||||||
Temperature Range During Event: | Max: °C, Min: °C | |||||||||||||||||||||||||
Salinity Range During Event: | ||||||||||||||||||||||||||
Bloom location in the water column: | ||||||||||||||||||||||||||
Growth: | ||||||||||||||||||||||||||
Growth Comments | ||||||||||||||||||||||||||
Additional Environmental information: | occurred following a period of calm sea conditions with warmer than averagewater temperatures. |
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Kit used: | Type of kit used: | ||||||
Additional information: | |||||||
Economic losses: | |||||||
Management decision: | |||||||
Additional harmful effect information: | Urchins densities declined by 56%-60% at blooms sites over the study period, urchins are extremely important as herbivores and as a resource, threat to coastal food webs and fisheries. |