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The gray whale (Eschrichtius robustus), [1] also known as the grey whale, [5] is a baleen whale that migrates between feeding and breeding grounds yearly. It reaches a length of 14.9 meters (49 ft), a weight of up to 41 tonnes (90,000 lb) and lives between 55 and 70 years, although one female was estimated to be 75–80 years of age.
The gray whale population experienced an unusual mortality event from 2019 to 2023, which scientists believe was caused by a decrease in available prey in the northern Arctic seas, resulting in a ...
Federal researchers indicate the gray whale population along the West Coast is showing signs of recovery five years after hundreds washed up dead on beaches from Alaska to Mexico. The increase in ...
The population began to decline after numbering about 27,000 whales in 2016. The mortality event hits its peak between Dec. 17, 2018, and Dec. 31, 2020, the agency said. It involved 690 dead gray whales that washed ashore from Alaska to Mexico. Of those, 347 were in the U.S., 316 in Mexico and 27 in Canada. In an average year, about 35 whales ...
But in 1999, they began showing up — just as an unusual mortality event got underway that, by its end in 2002, nearly halved the eastern Pacific population of gray whales.
Fossils of Eschrichtiidae have been found in all major oceanic basins in the Northern Hemisphere, and the family is believed το date back to the Late Miocene. [9] Today, gray whales are only present in the northern Pacific, but a population was also present in the northern Atlantic before being driven to extinction by European whalers three centuries ago.
The International Union for Conservation of Nature (IUCN) notes that the Atlantic population of gray whales was made extinct around the turn of the eighteenth century. [1] Examination of remains found in England and Sweden found evidence of a separate Atlantic population of gray whales existing up until 1675. [2]
“NOAA estimates the North Pacific gray whale population declined from 20,500 whales in 2019 to 14,526 whales in 2023, listing malnutrition, killer whale predation, entanglement, and vessel ...