| Event name: | US-24-017 | |
| Country: | UNITED STATES | |
|
Nature of the harmful event: |
Seafood toxins , Mass mortalities | |
|
Event directly affected: |
Natural Fish , Birds , Aquaculture Fish , Shellfish , Aquatic Mammals | |
| Toxicity detected: | Yes (Approximate range: California Mussel (Mytilus californicus) 18 ppm, Cultured Bay mussel 27 ppm, pacific oyster 45 ppm) | |
| Associated syndrome: | ASP | |
| Unexplained toxicity: | No | |
| Species implicated in toxin transmission (transvector): | Clinical signs consistent with ASP toxicity syndrome observed in marine mammals was attributed to consumption of prey species (e.g., anchovy, sardine, market squid) containing domoic acid. | |
| Report the outcome of a monitoring programme: | Yes (California Department of Public Health - Marine Biotoxin Monitoring Program) | |
| Event occurred before in this location: | Yes (ASP-related marine mammal and bird strandings in California have been tracked by the California Interagency HAB-related Illness Tracking Workgroup and reported to CDC OHHABS annually since 2019 (2019-2024: 1,831 individual animals)) | |
| Individuals to contact: | ZUBKOUSKY-WHITE, Vanessa , MURPHY, Shannon | |
| Location: | Latitude: , Longitude: | |
| General location information: |
California - Santa Barbara, Ventura, San Diego Counties, HAB Area code(s): US-19 |
|
| Additional location information: | domoic acid detected (< 20 ppm) August and September | |
| Bloom event dates (yyyy/mm/dd): | ||
| Quarantine levels dates (yyyy/mm/dd): | First detection: 2024-08-05, End: 2024-09-27 | |
| Additional date-related information: | ||
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Pseudo-nitzschia spp.
( cells/L)
|
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| Co-Ocurring Species/Genus: | ||
| Chlorophyll concentration, if known: | µg/l | |
| Additional bloom information: | ||
| Event-related bibliography: | ||
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| Nutrient information: | ||||||||||||||||||||||||||
| Temperature Range During Event: | Max: °C, Min: °C | |||||||||||||||||||||||||
| Salinity Range During Event: | ||||||||||||||||||||||||||
| Bloom location in the water column: | Whole column | |||||||||||||||||||||||||
| Growth: |
In situ |
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| Growth Comments | ||||||||||||||||||||||||||
| Additional Environmental information: | 147 stranded marine mammals (142 California sea lions, 3 Northern fur seals, and 2 common dolphins) across the 5 counties listed. Strandings were reported in every month of 2024 in one or more counties. | |||||||||||||||||||||||||
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| Kit used: No | Type of kit used: | |||||||||||
| Additional information: | ||||||||||||
| Economic losses: | ||||||||||||
| Management decision: | Harvesting closures Aug-Sept | |||||||||||
| Additional harmful effect information: | Marine Mammal stranding events were responded to by the marine mammal care and stranding network of California. The California Interagency HAB-related Illness Workgroup tracks HAB-related illnesses and reported these stranding events to the OHHABS | |||||||||||
