| Event name: | ES-03-009 | |
| Country: | SPAIN | |
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Nature of the harmful event: |
Water Discoloration , Seafood toxins | |
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Event directly affected: |
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| Toxicity detected: | Yes (Approximate range: DSP Positive.) | |
| Associated syndrome: | DSP | |
| Unexplained toxicity: | No | |
| Species implicated in toxin transmission (transvector): | ||
| Report the outcome of a monitoring programme: | Yes (MONITORING PROGRAMME OF THE CENTRO DE CONTROL DO MEDIO MARIÑO) | |
| Event occurred before in this location: | Yes (First report of toxicity associated to Gonyaulax polyedra in Galicia although red tides caused for this species had been previously reported in this region.) | |
| Individuals to contact: | MANEIRO, Juan , PAZOS, Yolanda , MOROÑO, Ángeles | |
| Location: | Latitude: 43.357333, Longitude: -8.236667 | |
| General location information: |
Ría de Ares-Betanzos., Galicia, NW Spain. HAB Area code(s): ES-05 |
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| Additional location information: | 43º 21.44' - 43º 24.55' N; 08º 17.11' - 08º 13.54' W. The affected area is dedicated to intensive mussel cultivation in rafts and to a high production of other molluscs in natural banks: clams, cockles, oyster and scallops are the main species exploited. | |
| Bloom event dates (yyyy/mm/dd): |
Event Date:2003-08-25 |
|
| Quarantine levels dates (yyyy/mm/dd): | ||
| Additional date-related information: | Start of detection of L. polyedra cells in 07/07/03 and end 08/09/03. This DSP episode due to L. polyedra was overlapped with a DSP episode due to D. acuminata. Since the DSP data are usually obtained by mouse bioassay, in this case it is not possible to stablish the exact date of detection and finalization of the toxins. | |
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Lingulodinium polyedra
(2,154,824 cells/L)
43º 21.44' N; 08º 14.20' W (St. L3) 25/08/03 |
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| Co-Ocurring Species/Genus: |
Skeletonema costatum
(444,015 cells/L)
Pseudo-nitzschia spp. (203,445 cells/L) Pseudo-nitzschia delicatissima (81,675 cells/L) |
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| Chlorophyll concentration, if known: | 19.8 µg/L Chlª. µg/l | |
| Additional bloom information: | ||
| Event-related bibliography: | ||
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| Nutrient information: |
AMONIUM:
1.13 µg/L
NITRATE: Not available NITRITE: 0.24 µg/L PHOSPHATE: 1.18 µg/L |
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| Temperature Range During Event: | Max: 24 °C, Min: 14 °C | |||||||||||||||||||||||||
| Salinity Range During Event: | Max: 35, Min: 30 | |||||||||||||||||||||||||
| Bloom location in the water column: | ||||||||||||||||||||||||||
| Growth: |
In situ |
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| Growth Comments | ||||||||||||||||||||||||||
| Additional Environmental information: | Wind velocity: 34 Km/h. | |||||||||||||||||||||||||
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| Kit used: No | Type of kit used: | |||||||||||
| Additional information: | The oficial detection method is by mouse bioassay: Yasumoto et al., Seafood toxins, 1984, 207-214.Some samples are analyzed by HPLC: Lee et al., Agric. Biol. Chem., 1987, 51, 877. | |||||||||||
| Economic losses: | Not evaluated | |||||||||||
| Management decision: | Harvesting was closed in culture areas affected. Wild mussels (Mytilus galloprovincialis) are used as bioindicator for infaunal molluscs, then when assay are possitive for this specie, infaunal molluscs are precautionary closed in that area, until samples | |||||||||||
| Additional harmful effect information: | Closures due to the presence of toxicity in molluscs is usual in the area and resource exploitation strategies allows to face these closures without great problems. | |||||||||||
