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NOAA is declaring an Unusual Mortality Event (UME) for bearded, ringed, and spotted seals in the Bering and Chukchi seas. From June 1, 2018 to present there have been reports of 282 dead seals, with 119 stranded seals in 2018 and 163 in 2019. The increase in ice seal mortality is nearly 5 times the average number of reported strandings, which is about 29 seals annually.
Since June 1, 2018, there have been 85 bearded, 66 ringed, 40 spotted, and 91 unidentified stranded ice seals . The UME includes:
Beringia Distinct Population Segment (DPS) bearded seals, listed under the ESA as threatened.
Arctic ringed seals, also listed as threatened.
Bering DPS spotted seals, not listed.
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Reports of stranded seals primarily occurred from June to September. All age classes of ice seals were reported. A subset of ice seals were sampled for harmful algal blooms and health parameters. When possible, skin was collected from stranded seals to help determine the species. Results are pending.
Why Declare an Unusual Mortality Event?
The Marine Mammal Protection Act defines an Unusual Mortality Event as a stranding event that is unexpected, involves a significant die-off, and demands an immediate response. NOAA Fisheries assessed whether the increased ice seal mortalities met at least one of seven criteria required for a UME.
We concluded that the ice seal die-off met the first criterion: A marked increase in the magnitude or a marked change in the nature of morbidity, mortality, or strandings when compared with prior records.
Declaration of a UME will bring more focus, expertise, and resources to help the investigation. The public may use Pay.gov to donate to the Marine Mammal UME Contingency Fund for this or other UMEs and help cover costs incurred by the Alaska Marine Mammal Stranding Network. |
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