Scant information is available on population status, densities, or population trends; it has been noted as locally common in the Mexican part of its range (P. Lavin pers. comm. 2005). Forstner et al. (2006) carried out range-wide surveys and found populations of the species concentrated in only a few stretches of the U.S. tributaries, whereas the species has minimal genetic structure across its range (Bailey et al. 2008).