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The research group discussed their findings on their website, saying, in part: "NOAA’s delisting criteria for Southern Resident killer whales include a population growth rate of 2.3% over 28 years.
North Pacific. Research off the west coast of Canada and the United States in the 1970s and 1980s identified the following three types: Resident (fish-eating) orcas: The curved dorsal fins are typical of resident females. Resident: These are the most commonly sighted of the three populations in the coastal waters of the northeast Pacific.
Southern resident orcas. The research vessel Noctiluca of the Northwest Fisheries Science Center in close proximity to an orca. The southern resident orcas, also known as the southern resident killer whales (SRKW), are the smallest of four communities of the exclusively fish-eating ecotype of orca in the northeast Pacific Ocean.
Orcas also prey on larger species such as sperm whales, grey whales, humpback whales and minke whales. [ 83 ] [ 40 ] On three separate occasions in 2019 orcas were recorded to have killed blue whales off the south coast of Western Australia, including an estimated 18–22-meter (59–72 ft) individual. [ 88 ]
Northern resident orcas. Northern resident orcas, also known as northern resident killer whales (NRKW), are one of four separate, non-interbreeding communities of the exclusively fish-eating ecotype of orca in the northeast portion of the North Pacific Ocean. They live primarily off the coast of British Columbia (BC), Canada, and also travel to ...
The agency has estimated the total number of eastern north Pacific Gray whales to be between 17,400 to 21,300, an increase from an estimated 13,200 to 15,960 whales last year. The population began ...
The waters of the Salish Sea, on the west coast of North America, are home to several ecologically distinct populations of orcas ( Orcinus orca ). The area supports three major ecotypes of orcas: northern residents, southern residents, and transients. A fourth ecotype, the offshore orcas, occasionally venture into nearshore waters. [ 1]
Whaling decimated the North Atlantic right whale population. Over a decade ago, there were 500 of the animals at peak population. But by 2017, that number fell drastically.