| Event name: | ZAF-78-002 | |
| Country: | SOUTH AFRICA | |
|
Nature of the harmful event: |
Seafood toxins , Mass mortalities | |
|
Event directly affected: |
Birds , Shellfish | |
| Toxicity detected: | Yes (Approximate range: 49µg/100g - 7283µg/100g) | |
| Associated syndrome: | PSP | |
| Unexplained toxicity: | No | |
| Species implicated in toxin transmission (transvector): | Black mussels, Choromytilus meridionalis | |
| Report the outcome of a monitoring programme: | No | |
| Event occurred before in this location: | Yes (1969 account by Grindley and Sapeika) | |
| Individuals to contact: | MANSFIELD, Lisa | |
| Location: | Latitude: -33.072500, Longitude: 17.936944 | |
| General location information: |
Jutten Bay, West Coast, South Africa HAB Area code(s): ZAF-01 |
|
| Additional location information: | Mussels affected from Lamberts Bay to Walker Bay with highest toxicity at Jutten Bay | |
| Bloom event dates (yyyy/mm/dd): |
Event Date:1978-05-01 Start: 1978-05-10, End: 1978-08-01 |
|
| Quarantine levels dates (yyyy/mm/dd): | First detection: 1978-05-10, | |
| Additional date-related information: | ||
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Gonyaulax catenella
( cells/L)
cell/L not given in this record |
|
| Co-Ocurring Species/Genus: | ||
| Chlorophyll concentration, if known: | µg/l | |
| Additional bloom information: | ||
| Event-related bibliography: | POPKISS, M. E. E., HORSTMAN, D. A. and D. HARPUR 1979 - Paralytic Shellfish Poisoning. S. Afr. Med. J. 55: 1017-1023. | |
|
||||||||||||||||||||||||||
| 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: | ||||||||||||||||||||||||||
|
||||||||||||
| Kit used: | Type of kit used: | |||||||||||
| Additional information: | Saxitoxin assays conducted according to methods described by Prakash et al 1971. All mice died and no significant extensions of death time was observed in either case. | |||||||||||
| Economic losses: | Mortality of black mussels and adult white mussels | |||||||||||
| Management decision: | For public health protection, it was recommended that shellfish toxicities be monitored with suitable warnings to public. | |||||||||||
| Additional harmful effect information: | 17 cases of PSP in humans occured in Cape Town during this event. | |||||||||||
