| Event name: | NZ-92-001 | |
| Country: | NEW ZEALAND | |
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Nature of the harmful event: |
High Phyto concentration | |
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Event directly affected: |
Aquaculture Fish | |
| Toxicity detected: | No | |
| Associated syndrome: | ||
| Unexplained toxicity: | ||
| Species implicated in toxin transmission (transvector): | ||
| Report the outcome of a monitoring programme: | No | |
| Event occurred before in this location: | No | |
| Individuals to contact: | RHODES Lesley | |
| Location: | Latitude: -46.982778, Longitude: 168.119722 | |
| General location information: |
Big Glory Bay, South Island HAB Area code(s): NZ-11 |
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| Additional location information: | ||
| Bloom event dates (yyyy/mm/dd): | Start: 1992-11-01, End: 1992-11-27 | |
| Quarantine levels dates (yyyy/mm/dd): | ||
| Additional date-related information: | ||
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Emiliania huxleyi
(9 600 000 cells/L)
|
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| Co-Ocurring Species/Genus: | ||
| Chlorophyll concentration, if known: | 3800 µg/l | |
| Additional bloom information: | ||
| Event-related bibliography: | Rhodes, L. L., Peake, B. M., MacKenzie, A. L., & Marwick, S. (1995). Coccolithophores Gephyrocapsa oceanica and Emiliania huxleyi (Prymnesiophyceae= Haptophyceae) in New Zealand's coastal waters: characteristics of blooms and growth in laboratory culture. New Zealand Journal of Marine and Freshwater Research, 29(3), 345-357. | |
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| Nutrient information: | ||||||||||||||||||||||||||
| Temperature Range During Event: | Max: °C, Min: °C | |||||||||||||||||||||||||
| Salinity Range During Event: | Max: 34.7, Min: 34.5 | |||||||||||||||||||||||||
| Bloom location in the water column: | ||||||||||||||||||||||||||
| Growth: | ||||||||||||||||||||||||||
| Growth Comments | ||||||||||||||||||||||||||
| Additional Environmental information: | ||||||||||||||||||||||||||
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| Kit used: | Type of kit used: | ||||||
| Additional information: | |||||||
| Economic losses: | Some salmon mortalities occurred at the time of the bloom and these appeared to be associated with gill disturbance. | ||||||
| Management decision: | Salmon cages were towed to refuge sites outside the bay in Paterson Inlet as a precautionary measure | ||||||
| Additional harmful effect information: | Emiliania huxleyi is a known dimethyl sulphide (DMS) producer, particularly in the later stages of a bloom (Matrai & Keller 1993). Sulphides are toxic to fish at low levels and have been linked to gill damage (Braaten et al. 1983). | ||||||
