Endangered and Threatened Wildlife and Plants; Initiation of Status Review of Arctic Grayling in the Upper Missouri River System

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We, the U.S. Fish and Wildlife Service (Service), under the authority of the Endangered Species Act of 1973, as amended (Act), announce the initiation of a status review of the Arctic grayling (Thymallus arcticus) upper Missouri River system distinct population segment (DPS). We conduct status reviews to determine whether the entity meets the definition of an endangered or threatened species under the Act. Following this status review, we will issue a proposed listing rule or a not warranted finding for the Arctic grayling upper Missouri River system DPS. Through this document, we encourage all interested parties to provide us information regarding the Arctic grayling in the upper Missouri River basin.