| Event name: | NA-50-001 | |
| Country: | NAMIBIA | |
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Nature of the harmful event: |
Water Discoloration , High Phyto concentration | |
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Event directly affected: |
Natural 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: | Yes (Fish mortalities were recorded from the 1940's) | |
| Individuals to contact: | MANSFIELD, Lisa | |
| Location: | Latitude: -22.886389, Longitude: 14.486667 | |
| General location information: |
Walvis Bay, Namibia, Northern Benguela HAB Area code(s): NAM-01 |
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| Additional location information: | ||
| Bloom event dates (yyyy/mm/dd): |
Event Date:1950-12-24 |
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| Quarantine levels dates (yyyy/mm/dd): | ||
| Additional date-related information: | ||
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Gymnodinium galatheanum Braarud 1957
( cells/L)
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| Co-Ocurring Species/Genus: | ||
| Chlorophyll concentration, if known: | µg/l | |
| Additional bloom information: | ||
| Event-related bibliography: | BRAARUD, T. 1957 - A red water organism from Walvis Bay (Gymnodinium galatheanum n. sp.). Galathea Deep Sea Exped. 1: 137-138. COPENHAGEN, W.J., 1953. The periodic mortality of fish in the Walvis region; a phenomenon within the Benguela Current. Investl Rep. Div. Fish. S. Afr. 14, 1-35. | |
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| Temperature Range During Event: | Max: °C, Min: °C | |||||||||||||||||||||||||
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| Bloom location in the water column: | ||||||||||||||||||||||||||
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| Kit used: | Type of kit used: | ||||||
| Additional information: | |||||||
| Economic losses: | Thousands of tons of dead and dying fish were observed at sea or washed up on beaches in the Walvis Bay region | ||||||
| Management decision: | |||||||
| Additional harmful effect information: | Cephalopods, lamellibranchs and other forms of marine life have been observed in the sea and and on the beaches of Spencer Bay, Conception Bay, Walvis Bay, Swakopmund and even as far north as the Ogab River. | ||||||
