Publications

karyotypes of kangaroo rats from southern california.		1971	5545558
coccidia from kangaroo rats (dipodomys spp.) in the western united states, baja california, and northern mexico with descriptions of eimeria merriami sp. n. and isospora sp.		1983	6827438
coccidia from california kangaroo rats (dipodomys spp.).		1985	4057012
wood rats and kangaroo rats: potential reservoirs of the lyme disease spirochete in california.	the etiologic agent of lyme disease, borrelia burgdorferi johnson, schmid, hyde, steigerwalt & brenner, was isolated repeatedly from dusky-footed wood rats, neotoma fuscipes baird, and california kangaroo rats, dipodomys californicus merriam, in northern california. all animals were collected in a region endemic for lyme disease but for which the natural reservoir of b. burgdorferi was unknown. similar attempts to isolate spirochetes from lizards, other species of rodents, jack rabbits, and deer ...	1991	1875357
genetic diversity among borrelia burgdorferi isolates from wood rats and kangaroo rats in california.	twenty-nine borrelia burgdorferi isolates, obtained from dusky-footed wood rats (neotoma fuscipes) and california kangaroo rats (dipodomys californicus) in california, were analyzed genetically. chromosomal dna was examined by restriction endonuclease analysis (rea) and gene probe restriction fragment length polymorphism. pulsed-field gel electrophoresis was used to analyze the plasmid profiles of the isolates. rea, the method with the greatest discrimination, disclosed 24 distinct restriction p ...	1993	7905880
fleas (siphonaptera) infesting giant kangaroo rats (dipodomys ingens) on the elkhorn and carrizo plains, san luis obispo county, california.	the giant kangaroo rat, dipodomys ingens (merriam), has a limited distribution in the san joaquin valley, ca. because of reductions in its geographic range, largely resulting from humans, the species was listed as an endangered species in 1980 by the california fish and game commission. as part of a study of the community ecology of southern california endangered species, including d. ingens, we were able to make flea collections from the rats when they were trapped and marked for population stu ...	1993	8433341
reservoir competence of four chaparral-dwelling rodents for borrelia burgdorferi in california.	aspects of the reservoir competence of four rodents for the lyme disease spirochete, borrelia burgdorferi, were evaluated in california. rodents were live-trapped and ear-punch biopsies were cultured during each season. a second set of biopsies was cultured from representative individuals after 2-3 weeks of captivity and the results of culturing biopsies taken on both dates were compared with the results of feeding ixodes pacificus larvae on hosts xenodiagnostically. the prevalence of infections ...	1996	8651378
ixodes (ixodes) jellisoni and i. (i.) neotomae (acari:ixodidae): descriptions of the immature stages from california.	nymphal and larval stages of ixodes (ixodes) jellisoni cooley & kohls and i. (i.) neotomae cooley are described for the first time. these 2 tick species occur only in the western united states, predominantly in california. the primary host for i. jellisoni is the california kangaroo rat, dipodomys californicus (merriam); that for i. neotomae is the dusky-footed woodrat, neotoma fuscipes baird. the etiologic agent of lyme disease borrelia burgdorferi johnson, schmidt, hyde, steigerwalt & brenner ...	1996	8667376
geographic patterns of genetic differentiation within the restricted range of the endangered stephens' kangaroo rat dipodomys stephensi.	using mtdna variation in the kangaroo rat dipodomys stephensi, we found no support for the hypothesis that a species with an historically restricted range will exhibit low levels of genetic polymorphism and little genetic structure. dipodomys stephensi has long been restricted to a few interior coastal valleys in southern california encompassing an area of approximately 70 x 40 km; however, we found high levels of genetic variation over much of its range and significant genetic structure both wi ...	2001	11475059
effects of trichloroethylene and perchloroethylene on wild rodents at edwards air force base, california, usa.	effects of inhalation of volatilized trichloroethylene (tce) or perchloroethylene (pce) were assessed based on the health and population size of wild, burrowing mammals at edwards air force base (ca, usa). organic soil-vapor concentrations were measured at three sites with aquifer contamination of tce or pce of 5.5 to 77 mg/l and at two uncontaminated reference sites. population estimates of kangaroo rats (dipodomys merriami and d. panamintinus) as well as hematology, blood chemistry, and histop ...	2004	15378993
western gray squirrel (rodentia: sciuridae): a primary reservoir host of borrelia burgdorferi in californian oak woodlands?	in california, dense woodlands have been recognized as important biotopes where humans are exposed to the nymphal stage of the western blacklegged tick, ixodes pacificus cooley & kohls, the primary vector of the lyme disease spirochete borrelia burgdorferi sensu stricto (s.s.), in the far-western united states. to identify the principal reservoir host(s) of this spirochete, and of closely related spirochetes in the b. burgdorferi sensu lato (s.l.) complex, in dense woodlands in mendocino county, ...	2005	15962792
sylvatic maintenance of borrelia burgdorferi (spirochaetales) in northern california: untangling the web of transmission.	lyme borreliosis is associated with several genospecies of borrelia burgdorferi sensu lato (s.l.) (spirochaetales), but human disease has been associated only with borrelia burgdorferi sensu stricto (s.s.) johnson, schmid, hyde, steigerwalt & brenner in the western united states. restriction fragment length polymorphism (rflp) analysis of rrf-rrl amplicons from 124 tick and mammalian isolates from various habitats yielded 13 rflp patterns. of these patterns, six were patterns previously associat ...	2006	16892634
partitioning the effects of an ecosystem engineer: kangaroo rats control community structure via multiple pathways.	1. ecosystem engineers impact communities by altering habitat conditions, but they can also have strong effects through consumptive, competitive and other non-engineering pathways. 2. engineering effects can lead to fundamentally different community dynamics than non-engineering effects, but the relative strengths of these interactions are seldom quantified. 3. we combined structural equation modelling and exclosure experiments to partition the effects of a keystone engineer, the giant kangaroo ...	2011	22098534
permeability of roads to movement of scrubland lizards and small mammals.	a primary objective of road ecology is to understand and predict how roads affect connectivity of wildlife populations. road avoidance behavior can fragment populations, whereas lack of road avoidance can result in high mortality due to wildlife-vehicle collisions. many small animal species focus their activities to particular microhabitats within their larger habitat. we sought to assess how different types of roads affect the movement of small vertebrates and to explore whether responses to ro ...	2013	23772966