| Event name: | NZ-10-001 | |
| Country: | NEW ZEALAND | |
|
Nature of the harmful event: |
High Phyto concentration , Mass mortalities | |
|
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: -41.081389, Longitude: 174.333056 | |
| General location information: |
Ruakaka Bay, South Island HAB Area code(s): NZ-08 |
|
| Additional location information: | ||
| Bloom event dates (yyyy/mm/dd): | Start: 2010-06-05, End: 2010-06-12 | |
| Quarantine levels dates (yyyy/mm/dd): | ||
| Additional date-related information: | ||
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Chattonella verruculosa
(120,000 cells/L)
Real name: Pseudochattonella verruculosa |
|
| Co-Ocurring Species/Genus: | ||
| Chlorophyll concentration, if known: | µg/l | |
| Additional bloom information: | ||
| Event-related bibliography: | MacKenzie, L. A., Smith, K. F., Rhodes, L. L., Brown, A., Langi, V., Edgar, M., ... & Preece, M. (2011). Mortalities of sea-cage salmon (Oncorhynchus tshawytscha) due to a bloom of Pseudochattonella verruculosa (Dictyochophyceae) in Queen Charlotte Sound, New Zealand. Harmful Algae, 11, 45-53. | |
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| Nutrient information: |
NITRATE:
6.0 mmol N/m^3
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| Temperature Range During Event: | Max: °C, Min: °C | |||||||||||||||||||||||||
| Salinity Range During Event: | ||||||||||||||||||||||||||
| Bloom location in the water column: | ||||||||||||||||||||||||||
| Growth: | ||||||||||||||||||||||||||
| Growth Comments | ||||||||||||||||||||||||||
| Additional Environmental information: | ||||||||||||||||||||||||||
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| Kit used: No | Type of kit used: | ||||||
| Additional information: | |||||||
| Economic losses: | 200 tons of salmon (Oncorhynchus tshawytscha) lost (15% of the total fish stock of the farm) | ||||||
| Management decision: | Towing away of cages | ||||||
| Additional harmful effect information: | The pathologies observed in kidney and liver of salmons tissues could also be consistent with exposure to nephro- and hepato-toxins. | ||||||
