| genetic, morphological, and ecological characterization of a hybrid zone that spans a migratory divide. | this study characterizes a hybrid zone that spans a migratory divide between subspecies of the swainson's thrush (catharus ustulatus), a long distance migratory songbird, in the coast mountains of british columbia. to assess the potential for a barrier to gene flow between the subspecies, i: (1) analyzed the shape and width of genetic and morphological clines relative to estimates of dispersal distance, (2) assessed the ratio of parental to hybrid genotypes across the hybrid zone, (3) estimated ... | 2008 | 18039327 |
| population genetic structure of gray wolves (canis lupus) in a marine archipelago suggests island-mainland differentiation consistent with dietary niche. | emerging evidence suggests that ecological heterogeneity across space can influence the genetic structure of populations, including that of long-distance dispersers such as large carnivores. on the central coast of british columbia, canada, wolf (canis lupus l., 1758) dietary niche and parasite prevalence data indicate strong ecological divergence between marine-oriented wolves inhabiting islands and individuals on the coastal mainland that interact primarily with terrestrial prey. local holders ... | 2014 | 24915756 |
| rethinking biogeographic patterns: high local variation in relation to latitudinal clines for a widely distributed species. | wide-ranging species typically differ morphologically across their ranges. bergmann's rule suggests that taxa in colder environments are bigger than related taxa in warmer locations. we examined 767 painted turtles (chrysemys picta) in ten populations near their northwestern range edge in south-central british columbia, canada, in conjunction with previous data, to test the hypotheses of (1) a bergmann's latitudinal cline, and (2) that males and females show similar latitudinal variation in size ... | 2015 | 25975206 |
| asymmetry in structural defenses: insights into selective predation in the wild. | assessment of geographical patterns in fluctuating asymmetry (small, random differences between sides of bilateral characters) among populations shows promise as a tool to resolve the relative biomechanical importance of traits, in addition to being a possible indicator of habitat quality. we used 115 endemic freshwater populations of threespine stickleback (gasterosteus aculeatus) from haida gwaii (queen charlotte islands), british columbia, canada, to explore the degree of concordance between ... | 2003 | 14575332 |
| kisameet glacial clay: an unexpected source of bacterial diversity. | widespread antibiotic resistance among bacterial pathogens is providing the impetus to explore novel sources of antimicrobial agents. recently, the potent antibacterial activity of certain clay minerals has stimulated scientific interest in these materials. one such example is kisameet glacial clay (kc), an antibacterial clay from a deposit on the central coast of british columbia, canada. however, our understanding of the active principles of these complex natural substances is incomplete. like ... | 2017 | 28536287 |
| population structure and stock identification of eulachon (thaleichthys pacificus), an anadromous smelt, in the pacific northwest. | the genetic structure of eulachon (thaleichthys pacificus) populations was examined in an analysis of variation of 14 microsatellite loci representing approximately 1900 fish from 9 sites between the columbia river and cook inlet, alaska. significant genetic differentiation occurred among the putative populations. the mean f(st) for all loci was 0.0046, and there was a significant correlation between population genetic differentiation (f(st)) and geographic distance. simulated mixed-stock sample ... | 2017 | 15906115 |
| glacial biogeography of north american coho salmon (oncorhynchus kisutch). | to study the glacial biogeography of coho we examined 20 microsatellite loci and mitochondrial dna d-loop sequence in samples from alaska to california. microsatellite data divided our samples among five biogeographic regions: (1) alaska and northern coastal british columbia; (2) the queen charlotte islands; (3) the mainland coast of british columbia and northern washington state; (4) the thompson river; and (5) oregon and california. the d-loop sequence data suggested three geographical regions ... | 2001 | 11903891 |