| ixodes scapularis and borrelia burgdorferi among diverse habitats within a natural area in east-central illinois. | abstract the distributions of the tick vector, ixodes scapularis, and of the etiologic agent of lyme disease, borrelia burgdorferi (bb), have continued expanding in illinois over the past 20 years, but the extent of their spread is not well known. the role of multiple habitats in the establishment and maintenance of i. scapularis and bb at local scales is not well understood, and the use of integrated approaches to evaluate local scale dynamics is rare. we evaluated habitat diversity and tempora ... | 2011 | 21688974 |
| trait-demography relationships underlying small mammal population fluctuations. | large-scale fluctuations in abundance are a common feature of small mammal populations and have been the subject of extensive research. these demographic fluctuations are often associated with concurrent changes in the average body mass of individuals, sometimes referred to as the 'chitty effect'. despite the long-standing recognition of this phenomenon, an empirical investigation of the underlying coupled dynamics of body mass and population growth has been lacking. using long-term life-history ... | 2017 | 28000289 |
| intraspecific variation in estrogen receptor alpha and the expression of male sociosexual behavior in two populations of prairie voles. | estrogen (e) regulates a variety of male sociosexual behaviors. we hypothesize that there is a relationship between the distribution of estrogen receptor alpha (eralpha) and the degree of male social behavior. to test this hypothesis, eralpha immunoreactivity (ir) was compared in prairie voles (microtus ochrogaster) from illinois (il), which are highly social, and kansas (kn), which are less social. the expression of androgen receptors (ar) in males also was compared between populations. the exp ... | 2004 | 15246861 |
| the effects of peptides on partner preference formation are predicted by habitat in prairie voles. | this study tested the hypothesis that intraspecific variations in mating systems are correlated with differences in the capacity of peripheral arginine vasopressin (avp) to facilitate partner preferences. it has been hypothesized that differences in environmental conditions, kansas being more xeric than illinois, are responsible for some of the intraspecific differences in the mating systems between kansas (kn) and illinois (il) prairie voles. we predicted that prairie voles from kn would be mor ... | 2001 | 11161883 |