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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. The southern resident orcas form a closed society with no emigration or dispersal of individuals, and no gene flow with other orca populations. [1]
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While there is no record of southern resident orcas eating harbor porpoises, at least 78 incidents have been recorded since 1962 involving orcas harassing harbor porpoises, of which 28 resulted in the porpoise's death; it has never been confirmed whether this is the result of competition for food, rough play, or true aggression. [9]
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. Residents' diets consist primarily of fish [6] and sometimes squid, and they live in complex and cohesive family groups called pods. [7]
Southern resident orcas; Springer (orca) T. Tahlequah (orca) Takara (whale) U. Unna (whale) W. Walter the Whale; Wikie; Y. Yukon Harbor orca capture operation
An endangered orca vanished from a dwindling whale pod off the Washington coast, a conservation group said. The missing Southern Resident killer whale, K-26, was not seen by researchers during an ...
Southern resident orcas. In terms of cetaceans, both toothed and baleen whales inhabit the coastal waters of the Salish Sea and the offshore waters of Washington and British Columbia. Of these, the orca is the most famous, with humpback whales and gray whales also well known in the area. Most cetaceans, however, are usually seen in the area ...
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