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"Unusual Mortality Event"

Unusual Mortality Event Results

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National Marine Mammal Stranding Response Network

The U.S. Marine Mammal Stranding Response Network responds to live stranded, sick, injured, out of habitat, or entangled marine mammals, and investigates dead stranded marine mammals.
National

Closure of 2019–2023 Eastern North Pacific Gray Whale Unusual Mortality Event

The Unusual Mortality Event involving stranded eastern North Pacific gray whales has ended.
March 14, 2024 - Feature Story ,
West Coast
People on a beach performing a necropsy on a stranded gray whale

Closure of 2022 Maine Pinniped Unusual Mortality Event

The Unusual Mortality Event involving stranded harbor and gray seals along the coast of Maine has ended.
January 16, 2024 - Feature Story ,
New England/Mid-Atlantic
HPAI Testing on a seal. Marine Mammals of Maine take nasal swabs from a harbor seal for HPAI testing. Credit: Marine Mammals of Maine

2017-2023 Minke Whale Unusual Mortality Event along the Atlantic Coast Dead Animal Locations

This dataset represents dead animal locations associated with the 2017-2023 Minke Whale Unusual Mortality Event along the Atlantic Coast.
March 23, 2023 - Map ,
National

2016-2024 Humpback Unusual Mortality Event along the Atlantic Coast Dead Animal Locations

This dataset represents dead animal locations associated with the 2016-2024 Humpback Whale Unusual Mortality Event along the Atlantic Coast.
January 27, 2023 - Map ,
National

Thirty-Seven Morbidity Cases Added to North Atlantic Right Whale Unusual Mortality Event

A new scientific peer-reviewed protocol adds 37 individuals to the ongoing North Atlantic right whale UME. This provides a more complete picture of this endangered species’ status and challenges impeding its recovery.
October 14, 2022 - Feature Story ,
National
NARW #4510 case UME Photo: North Atlantic right whale (#4510) with evidence of sublethal entanglement injuries along the head and body.

2022 Pinniped Unusual Mortality Event along the Maine Coast Dead Animal Locations

This dataset represents dead animal locations associated with the 2022 Pinniped Unusual Mortality Event along the Maine Coast.
August 17, 2022 - Map ,
National

Adult North Atlantic Right Whale Found Dead off South Carolina

Spotted entangled south of Nantucket last October, the whale was re-spotted in poor body condition off Florida’s Treasure Coast in February.
February 28, 2021 - Feature Story ,
New England/Mid-Atlantic
Southeast
North Atlantic right whale seen from above with gear trailing from its mouth. An aerial survey team from Center for Coastal Studies spotted an entangled right whale south of Nantucket on October 19, 2020. Photo taken under Center for Coastal Studies permit.

West Coast Gray Whales Declined During Unusual Mortality Event, Similar to Past Fluctuations in Numbers

Decline resembles drop 20 years ago, which was followed by an increase.
January 19, 2021 - Feature Story ,
Alaska
West Coast
Breaching gray whale A new estimate shows that the gray whale population that migrates along the West Coast of North America has declined in number about 24 percent since 2016. Photo by Dave Weller/NOAA Fisheries

Alaska Gray Whale UME Update: Twentymile River Whale Likely One of Twelve Dead Gray Whales So Far This Year in Alaska

Twelve dead gray whales were confirmed in Alaska in 2020. The Gray Whale Unusual Mortality Event, declared May 2019, continues along the west coast of North America, from Mexico through Alaska.
June 23, 2020 - Feature Story ,
Alaska
750x500 Theodore River Gray whale.jpg