Rachel R Jones's research while affiliated with University of Nebraska at Lincoln and other places

Publications (3)

Article
Full-text available
Archeological and paleontological records indicate that the pronghorn (Antilocapra americana) have a history of at least 20,000 years of occurrence within the current boundaries of Nebraska. Pronghorns occurred throughout the state for much of its history. With the evidence at hand we concluded that the eastern boundary of the geographic distributi...
Article
Full-text available
Populations of pronghorn (Antilocapra americana) are subjected to multiple forms of density-dependent and density-independent regulation. Little is known about the combined effects of these variables across multiple populations throughout the landscape. The objectives of this study were to examine long-term trends in density and recruitment in pron...
Data
Full-text available
Populations of pronghorn (Antilocapra americana) are subjected to multiple forms of density-dependent and density-independent regulation. Little is known about the combined effects of these variables across multiple populations throughout the landscape. The objectives of this study were to examine long-term trends in density and recruitment in pron...

Citations

... In this case, the potential loss due to false detection of the transcritical bifurcation seems minimal. In addition to the transcritical bifurcation extinction threshold identified in our state–space model, other mechanisms in the population dynamics may exist that result in threshold dynamics, such as an Allee effect (Hoffman et al. 2010; Dai et al. 2012; Lade and Gross 2012). Although we cannot rule out that SVL is detecting alternative extinction thresholds, the generality of CSD suggests that we might expect the same patterns in SVL, regardless of the mechanism generating the threshold (Wissel 1984). ...
... The δ 15 N value (6.8‰) for the pronghorn matches those of the bison and the elk, but the δ 13 C col value (−19.6‰) points to this animal consuming mainly C 3 grasses and plants and, therefore, not subsisting on the same tallgrass-prairie ecosystem. While pronghorns are not found in Iowa today, historically they were in the far west of the state, with a habitat range throughout most of the Great Plains and into the far western states (Hoffman et al. 2011). Today their habitat is much reduced. ...
... It can be quantified in terms of the number of adult females detected, which is typically expressed as a cow:calf or doe:fawn ratio in ungulates (e.g. Eberhardt et al. 1996;Hoffman et al. 2010). Female reproductive rate therefore offers promise as a convenient indicator of irruption phase. ...