| host associations of the tick, ixodes angustus (acari: ixodidae), on alaskan mammals. | infestation parameters are presented for 227 ticks, all ixodes angustus neumann, collected from individual mammals (n = 531) in southeastern and south-central alaska from 1996 to 1999. this tick was recovered from 12 of the 19 mammal species examined, with four species of shrews (sorex spp.), two species of voles [clethrionomys gapperi (vigors) and clethrionomys rutilus (pallas)], one species of mouse [peromyscus keeni (rhoads)], and the red squirrel [tamiasciurus hudsonicus (erxleben)] being th ... | 2003 | 14596283 |
| historical demography and genetic structure of sister species: deermice (peromyscus) in the north american temperate rain forest. | to investigate the evolutionary and biogeographical history of peromyscus keeni and p. maniculatus within the coastal forest ecosystem of the pacific northwest of north america, we sampled 128 individuals from 43 localities from southeastern alaska through oregon. we analysed mitochondrial dna variation using dna sequence data from the mitochondrial cytochrome-b (cyt-b) gene and control region, and we found two distinct clades consistent with the morphological designation of the two species. the ... | 2003 | 12675826 |