Why Are Southern Resident Killer Whales Not Recovering? Ground-Breaking Study Shows Inbreeding Major Contributor To Decline Of Endangered Orcas

The small size and isolation of the endangered population of Southern Resident killer whales in the Pacific Northwest have led to high levels of inbreeding. This inbreeding has contributed to their decline, which has continued as surrounding killer whale populations expand, according to research published in Nature Ecology and Evolution.

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