| Event name: | RU-17-001 | |
| Country: | RUSSIAN FEDERATION | |
|
Nature of the harmful event: |
Water Discoloration , Mass mortalities , Other ( Pink salmon (Oncorhynchus gorbuscha) was sluggish and soon died in a net trap.) | |
|
Event directly affected: |
Natural Fish | |
| Toxicity detected: | Yes (Approximate range: 5 μg kg-1 with specificity to different PSP toxins of: PSP, 100%; decarbomoyl PSP, 20%; gonyautoxin II and III, 70%; neosaxitoxin, 12%.) | |
| Associated syndrome: | PSP | |
| Unexplained toxicity: | ||
| Species implicated in toxin transmission (transvector): | Oncorhynchus gorbuscha | |
| Report the outcome of a monitoring programme: | No | |
| Event occurred before in this location: | ||
| Individuals to contact: | ORLOVA, Tatiana Yu , LEPSKAYA, Ekaterina , MOROZOVA, Tatiana | |
| Location: | Latitude: 60.595278, Longitude: 168.444722 | |
| General location information: |
, Olyutorsky Bay, Bering Sea HAB Area code(s): RU-06 |
|
| Additional location information: | ||
| Bloom event dates (yyyy/mm/dd): |
Event Date:2017-07-21 Start: 2017-07-11, |
|
| Quarantine levels dates (yyyy/mm/dd): | ||
| Additional date-related information: | ||
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Alexandrium tamarense
(132000 cells/L)
|
|
| Co-Ocurring Species/Genus: | ||
| Chlorophyll concentration, if known: | 15-25 mg m-3 µg/l | |
| Additional bloom information: | ||
| Event-related bibliography: | Lepskaya E.V., Mogilnikova T.A., Shubkin S.V., Tepnin O.B. Red tides in Kamchatka coastal waters (Bering Sea, Russia) are a barrier for the salmon fishery and Pacific salmon. Harmful Algal News. 2018. 59, 20-21. | |
|
||||||||||||||||||||||||||
| Nutrient information: | ||||||||||||||||||||||||||
| Temperature Range During Event: | Max: °C, Min: °C | |||||||||||||||||||||||||
| Salinity Range During Event: | ||||||||||||||||||||||||||
| Bloom location in the water column: |
Subsurface |
|||||||||||||||||||||||||
| Growth: | ||||||||||||||||||||||||||
| Growth Comments | ||||||||||||||||||||||||||
| Additional Environmental information: | the bloom extended along the central coastal zone of the bay, in a layer approximately 5-6 m in depth. | |||||||||||||||||||||||||
|
|||||||
| Kit used: Yes | Type of kit used: RIDASCREEN® FAST PSP SC, | ||||||
| Additional information: | Saxitoxin content in seawater samples was determined by an immune-enzyme assay (IEA). The test-system detection limit is 5 μg kg-1 with specificity to different PSP toxins of: PSP, 100%; decarbomoyl PSP, 20%; gonyautoxin II and III, 70%; neosaxitoxin, 12%. Saxitoxin concentration of the seawater sampled was 0.33 μg L -1. | ||||||
| Economic losses: | |||||||
| Management decision: | |||||||
| Additional harmful effect information: | There was mortality of some pink salmon individuals and re-distribution of the migratory paths for salmon, with most of them moving to the rivers adjacent to Olutorsky Bay. | ||||||
