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Status of the Imperiled Frecklebelly Madtom, Noturus munitus (Siluriformes: Ictaluridae): A Review of Data from Field Surveys, Museum Records, and the Literature

Abstract Noturus munitus (Frecklebelly Madtom), is a diminutive catfish restricted to large rivers in the Mobile Basin and Pearl River drainages in the southeastern United States. We conducted surveys of 13 major tributaries of the Alabama, Cahaba, and Tombigbee river systems in the Mobile Basin to determine use of tributaries by N. munitus. Our surveys found only one specimen in Oakmulgee Creek, a large tributary to the Cahaba River and one of the few rivers in which stable populations of N. munitus remain. We combine results from our recent survey with a review of the literature and museum records for N. munitus throughout its range to present a consolidated status report. Our review indicates that N. munitus is currently greatly reduced from its former range, and is in decline in most of the drainages it still inhabits. We recommend federal protection for the species under the Endangered Species Act. We also provide suggestions for future research and management actions for the species.