Ecology of the redfin darter and a potential emerging threat to its habitat

摘要: The basic biologies and ecologies of most freshwater fishes throughout the world are poorly understood. But such knowledge may be critical for conservation decisions. redfin darter (Etheostoma whipplei), a understood fish species, is an excellent model highlighting this situation. Much limited range species experiencing nontraditional natural gas extraction activities including hydraulic fracturing, which significant source silt input streams. We investigated aspects ecology metrics reproductive success darters in central Arkansas. examined habitat occupation through quantitative surveys assemblages variables, life history field laboratory Cypress Creek, also proportion young populations relative to intensity activity. Ordination analysis found gradients relating primarily stream size. Redfin had highest abundance samples small, high gradient reproduce spring, peaking with rainy season, using larger substrate than their close relatives. Reproductive appears negatively related intensity. at both time especially susceptible siltation from activities, reflected fewer populations. Our research highlights importance data understanding responses novel disturbances fishes.