Ronald A. Van Den Bussche

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Free-ranging mammals near the Chornobyl nuclear reactor are experiencing substantial radiation dose rates from intramuscular concentrations of 134,137Cs and skeletal 90Sr. Radiocesium concentrations averaged 3,200 Bq/g of dry muscle, compared to a mean of 297 Bq 90Sr/g in bone for mammals in the Exclusion Zone, a region of restricted human activity(More)
Analysis of mtDNA sequence variation (2,548 bp from ND2, cytb, and part of the control region) indicates that the genus Cyprinodon began diverging in the Late Miocene from a common ancestor with Megupsilon, a monotypic genus on the Mesa del Norte of Mexico. The geographic pattern of mtDNA variation, with estimates of divergence time, suggests that by the(More)
Department of Biological Sciences and Museum of Texas Tech University, Lubbock, TX 79409, USA AG Systematik und Evolutionsbiologie, IBU Fakultät V, Carl von Ossietzky Universität Oldenburg, 26111 Oldenburg, Germany Department of Biology, Xavier University of Louisiana, New Orleans, LA 70125, USA Depatment of Zoology, Oklahoma State University, Stillwater,(More)
We conducted a phylogenetic analysis of DNA sequences from 3 adjacent genes (12S rRNA, tRNAVal, and 16S rRNA) in the mitochondrial genome from representatives of 14 phyllostomid genera including 7 species of Tonatia. Previous studies of the systematic relationships within Tonatia document that some members of this group are extremely divergent from others.(More)
Bats possess a genome approximately 50–87% the size of other eutherian mammals. We document that the events that have achieved or maintained a small genome size in the Mexican leaf-nosed bat Macrotus waterhousii have resulted in a lower copy number of interspersed and tandemly repetitive elements. These conclusions are based on examination of 1726 randomly(More)
 Although white-tailed deer (Odocoileus virginianus) are one of North America's best studied mammals, no information is available concerning allelic diversity at any locus of the major histocompatibility complex in this taxon. Using the polymerase chain reaction, single-stranded conformation polymorphism analysis, and DNA sequencing techniques, 15 DRB exon(More)
All mammalian transposable elements characterized to date appear to be nonrandomly distributed in the mammalian genome. While no element has been found to be exclusively restricted in its chromosomal location, LINE elements and some retrovirus-like elements are preferentially accumulated in G-banding regions of the chromosomes, and in some cases in the sex(More)
Invasive Rattus are arguably the most costly and destructive invasive species on the planet, but little is known concerning their invasion history and population structure in the U.S. We utilized both nuclear microsatellites and mitochondrial DNA sequences (mtDNA) to compare the colonization history, patterns of gene flow, and levels of genetic diversity of(More)
Habitat loss, fragmentation, overharvest, and other anthropogenic factors have resulted in population and distribution declines for North American wolverines (Gulo gulo). Currently, wolverines east of the Hudson Bay are endangered and possibly extinct, whereas the status of wolverines throughout the remaining Holarctic is vulnerable. Three previous studies(More)
Intrageneric relationships within Noctilio were examined using the entire 1,140 base pairs of the mitochondrial cytochrome-b gene and 1,398 base pairs of the nuclear recombination activating gene-2. Sequences were analyzed to establish the relative time frame during which piscivory, the feeding strategy for hunting and eating fish, evolved in this genus.(More)