Threatened Status for the Santa Ana Sucker

We, the Fish and Wildlife Service (Service), determine threatened status according to the Endangered Species Act of 1973, as amended (Act), for the Santa Ana sucker (Catostomus santaanae). The species is threatened by potential habitat destruction, natural and human-induced changes in streamflows, urban development and related land-use practices, intensive recreation, introduction of nonnative competitors and predators, and demographics associated with small populations. The final rule invokes the Federal protection afforded by the Act for the Santa Ana sucker within the Los Angeles, San Gabriel, and Santa Ana River drainages.