| Event name: | ZAF-15-001 | |
| Country: | SOUTH AFRICA | |
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Nature of the harmful event: |
High Phyto concentration , Other ( 1st bloom event associated with anoxia and marine mortalities caused by P. triestunum.) | |
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Event directly affected: |
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| Toxicity detected: | No | |
| Associated syndrome: | OTHER | |
| 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: | MANSFIELD, Lisa | |
| Location: | Latitude: -32.728889, Longitude: 18.097778 | |
| General location information: |
St Helena Bay, West Coast HAB Area code(s): ZAF-01 |
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| Additional location information: | There were 22 sampling stations within the St Helena Bay area. | |
| Bloom event dates (yyyy/mm/dd): | Start: 2015-02-01, End: 2015-03-31 | |
| Quarantine levels dates (yyyy/mm/dd): | ||
| Additional date-related information: | Sampling on 10 and 11 February 2015. | |
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Prorocentrum triestinum
(14.32x10e6 cells/L)
at station 3 on 10 February 2015 |
|
| Co-Ocurring Species/Genus: | ||
| Chlorophyll concentration, if known: | 278.8 µg/l | |
| Additional bloom information: | Subsurface maximum chlorophyll-a was recorded at St 19. | |
| Event-related bibliography: | NDHLOVU, A., DHAR, N., GARG, N., XUMA, T., PITCHER, G.C., SYM, S.D. and P.M. DURAND 2017 – Red tide forming dinoflagellate Prorocentrum triestinum: identification, phylogeny and impacts on St Helena Bay, South Africa. Phycologia, 56 (6): 649–665. | |
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| Nutrient information: | ||||||||||||||||||||||||||
| Temperature Range During Event: | Max: 22.1 °C, Min: >10 °C | |||||||||||||||||||||||||
| Salinity Range During Event: | ||||||||||||||||||||||||||
| Bloom location in the water column: | Whole column | |||||||||||||||||||||||||
| Growth: | Advected | |||||||||||||||||||||||||
| Growth Comments | ||||||||||||||||||||||||||
| Additional Environmental information: | The red tide was observed along approximately 200km of the Namaqua coastline, extending well north of the Olifants river and southwards into the Bay. | |||||||||||||||||||||||||
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| Kit used: | Type of kit used: | ||||||
| Additional information: | |||||||
| Economic losses: | 415 tons of rock lobster (Jasus lalandii), 21 tons of molluscs (mostly the white mussel Donax serra) and 7 tons of various fish species. | ||||||
| Management decision: | |||||||
| Additional harmful effect information: | |||||||
