| Event name: | PT-88-004 | |
| Country: | PORTUGAL | |
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Nature of the harmful event: |
Water Discoloration | |
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Event directly affected: |
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| 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 (Csesis Bay 1982; Albufeira Lagoon 1987; mariculture ponds at Ria Formosa Lagoon (Alvarve coast) 1987) | |
| Individuals to contact: | SAMPAYO, MĒ Antonia | |
| Location: | Latitude: , Longitude: | |
| General location information: |
Sao Martinho do Porto Bay, HAB Area code(s): PT-01 |
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| Additional location information: | ||
| Bloom event dates (yyyy/mm/dd): | Start: 1988-08-03, End: 1988-08-10 | |
| Quarantine levels dates (yyyy/mm/dd): | ||
| Additional date-related information: | ||
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Heterosigma akashiwo
(9.7x10(6) cells/L)
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| Co-Ocurring Species/Genus: |
Skeletonema costatum
(2x10(6) cells/L)
Small flagellates 3.7x10(6); Dinoflagellates 0.2 x 10(6) |
|
| Chlorophyll concentration, if known: | µg/l | |
| Additional bloom information: | Heterosigma akashiwo has been associated with fish kills in other countries, in the Portuguese case only in the mariculture ponds at Algarve 1987 there was some mortality, this may be attributed to the confinment of the animals in the ponds | |
| Event-related bibliography: | ||
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| Nutrient information: | ||||||||||||||||||||||||||
| Temperature Range During Event: | Max: 18 °C, Min: 16 °C | |||||||||||||||||||||||||
| Salinity Range During Event: | Max: 35.5, Min: 34 | |||||||||||||||||||||||||
| Bloom location in the water column: | ||||||||||||||||||||||||||
| Growth: | Advected | |||||||||||||||||||||||||
| Growth Comments | Probably advected from offshore and concentrated inside the Bay associated with some in situ growth | |||||||||||||||||||||||||
| Additional Environmental information: | Intense brown discolorations | |||||||||||||||||||||||||
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| Kit used: | Type of kit used: | ||||||
| Additional information: | |||||||
| Economic losses: | |||||||
| Management decision: | |||||||
| Additional harmful effect information: | Oxygen deficiency observed at several localities in the early morning. Fish kills: none. | ||||||
