| habitat use by singing voles and tundra voles in the southern yukon. | we investigated how far competitive interactions influence the use of habitats and relative abundance of two species of microtus in the southwestern yukon. we worked in the ecotone between alpine tundra and subalpine shrub tundra where populations of singing voles (microtus miurus) and tundra voles (m. oeconomus) overlap little.we removed tundra voles from shrub tundra on one live-trapping area to look at the effect on the contiguous population of singing voles in alpine tundra. the removal of t ... | 1985 | 28310875 |
| comparative phylogeography highlights the double-edged sword of climate change faced by arctic- and alpine-adapted mammals. | recent studies suggest that alpine and arctic organisms may have distinctly different phylogeographic histories from temperate or tropical taxa, with recent range contraction into interglacial refugia as opposed to post-glacial expansion out of refugia. we use a combination of phylogeographic inference, demographic reconstructions, and hierarchical approximate bayesian computation to test for phylodemographic concordance among five species of alpine-adapted small mammals in eastern beringia. the ... | 2015 | 25734275 |
| phylogenetic relationships and taxonomic revision of paranoplocephala lühe, 1910 sensu lato (cestoda, cyclophyllidea, anoplocephalidae). | an extensive phylogenetic analysis and genus-level taxonomic revision of paranoplocephala lühe, 1910-like cestodes (cyclophyllidea, anoplocephalidae) are presented. the phylogenetic analysis is based on dna sequences of two partial mitochondrial genes, i.e. cytochrome c oxidase subunit 1 (cox1) and nadh dehydrogenase subunit 1 (nad1), and includes 51 cestode isolates. the revision concerns all 34 paranoplocephala-like species considered valid, of which 21 species could be included in the molecul ... | 2014 | 25544228 |
| significant morphological but little molecular differences between trypanosoma of rodents from alaska. | we examined blood smears of 173 rodents and 33 shrews captured at 4 sites in the gates of the arctic national park, northern alaska, in summer 2002. trypanosoma spp. were detected in the plasma of 5 microtus oeconomus, 4 microtus miurus, and 1 lemmus trimucronatus. the trypomastigote morphology from different individuals of m. oeconomus caught at the same site and of m. miurus from different sites varied significantly. the 4 dna sequences obtained from the blood smear positive samples contained ... | 2005 | 15856904 |