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 |
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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 |
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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. |