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| Author | : Elaine Louise Brighty |
| Publisher | : |
| Total Pages | : 212 |
| Release | : 1978 |
| Genre | : Peromyscus leucopus |
| ISBN | : |
| Author | : Catherine Amaris Mossman |
| Publisher | : |
| Total Pages | : 163 |
| Release | : 1999 |
| Genre | : Animal population genetics |
| ISBN | : |
| Author | : Robby Marrotte |
| Publisher | : |
| Total Pages | : |
| Release | : 2013 |
| Genre | : |
| ISBN | : |
"The white-footed mouse (Peromyscus leucopus) is a widespread habitat generalist species abundant over a large part of the North-American continent. In the past decade, due to climate and land use change, the range of this species has expanded northwards into Canada. The black-legged tick (Ixodes scapularis), is the vector of Lyme disease which also has tracked climate change over the last few decades. This may have been further promoted by the growing presence of P. leucopus, a favored host for the tick. Therefore, aspects of the landscape that affect the movement and distribution of the white-footed mouse, will also affect the expansion of the tick, and consequently the spread of Lyme disease. In this thesis, I first reviewed published results that relied on genetic and non- genetic biological data to investigate the influence of local habitat and landscape characteristics on the movement and dispersal patterns in the white footed-mouse. Next, I evaluated the relations between breeding habitat and landscape resistance against the genetic differentiation between 11 populations in Montérégie, Québec, Canada. I was able to simultaneously measure the effect of the habitat and the landscape on the genetic differentiation of these mouse populations by utilizing numerical optimization to fit a model to previously published genetic data. I used ecological distance computed from resistance surfaces with Circuitscape to infer the effect of the landscape. Concurrently, I estimated the habitat quality of our sampling localities and correlated these to relevant habitat measurements. I found that both characteristics within and between forest patches have more of an impact on genetic differentiation than the geographical distance between the mice populations. This suggests that this species can disperse and use a wide range of habitats, in accordance with its recent rapid expansion in the region." --
| Author | : Mark R. Feil |
| Publisher | : |
| Total Pages | : 70 |
| Release | : 1991 |
| Genre | : Peromyscus |
| ISBN | : |
| Author | : Christine Schandorsky Anderson |
| Publisher | : |
| Total Pages | : |
| Release | : 2004 |
| Genre | : Fragmented landscapes |
| ISBN | : |
Fragmentation of forests has led to the creation of forest patches that differ in size, proportion of edge habitat, and degree of isolation. Although densities of many mammalian species are positively related to patch area, there appears to be a general negative relationship between density of white-footed mice (Peromyscus leucopus) and patch area. In Chapters 2 - 5, I investigated both resource-based (i.e., vegetation characteristics) and dispersal-based (i.e., inhibited dispersal and sink) hypotheses to explain the negative density - area relationship using live-trapping data and DNA-microsatellite analyses. As an extension of how forest fragmentation may affect movements by this habitat generalist into and out of habitats, in Chapter 6 I focused on how patch isolation influences population genetic structure. Data were collected from 1999 to 2001 in 15 different patches of various sizes and degrees of isolation. I confirmed that relative abundance of P. leucopus was negatively related to forest patch area (Chapter 2). My results indicated that relative abundance of P. leucopus was positively related to structural complexity of understory vegetation and total basal area of trees, and tended to be negatively related to the species richness of trees (Chapter 2 and 3). Although I was unable to differentiate whether understory vegetation results in higher relative abundances due to food or cover, the results suggest that vegetation characteristics contribute to the negative density - area relationship. Based on live-trapping data and DNA-microsatellite analyses, I rejected both dispersal-based hypotheses to explain the effect of patch area on relative abundance of P. leucopus (Chapters 4 and 5). Within-population genetic variation was high across populations, and only 50% of individuals could be assigned to their population of capture based on multilocus genotypes, suggesting high rates of gene flow. Degree of isolation and landscape structure had a small but significant influence on population genetic structure in this species (Chapter 6). This project illustrates the habitat generalist behavior and good dispersal ability of white-footed mice, but it appears that both abiotic and biotic factors, including competition and predation, are important in explaining the effects of forest fragmentation on P. leucopus.
| Author | : Jill Christine Devine |
| Publisher | : |
| Total Pages | : 360 |
| Release | : 2012 |
| Genre | : |
| ISBN | : |
| Author | : Alan Garcia-Elfring |
| Publisher | : |
| Total Pages | : |
| Release | : 2017 |
| Genre | : |
| ISBN | : |
"Processes like allele surfing and genetic bottlenecks during range expansion have genetic consequences expected to result in differentiated wave-front populations with low genetic variation and potentially introgression by a local species. The northward expansion of Peromyscus leucopus in southern Quebec provides an opportunity to test these predictions using population genomic tools. Our results show evidence of recent and post-glacial expansion. Genome-wide variation in P. leucopus indicates two putative glacial lineages are separated by the St. Lawrence River, with a more recent post-glacial divergence of populations isolated by the Richelieu River. Most regressions of genetic diversity against relative expansion distance were not significant and half contradicted expectation by showing positive trends. However, in two of three transects we documented northern populations with the lowest diversity in at least one genetic measure. Consistent with bottlenecks and allele surfing during northward expansion, we document a northern-most population having low nucleotide diversity, divergent allele frequencies, the most private alleles, as well as the lowest effective population size and heterozygosity levels that indicate outcrossing. Ancestry proportions revealed putative hybrids of P. leucopus and P. maniculatus. A formal test for gene flow confirmed secondary contact, showing that a reticulate population phylogeny between P. maniculatus and P. leucopus was a better fit to the data than a bifurcating model without gene flow. Thus, we provide the first genomic evidence of gene flow between this pair of species in natural populations. Understanding the evolutionary consequences of secondary contact is an important conservation concern as climate-induced range expansions are expected to result in new hybrid zones between closely related species, with potential consequences for emerging infectious diseases." --
| Author | : U.S. Fish and Wildlife Service |
| Publisher | : |
| Total Pages | : 826 |
| Release | : 1976 |
| Genre | : Animals |
| ISBN | : |
| Author | : |
| Publisher | : |
| Total Pages | : 810 |
| Release | : 1979 |
| Genre | : Natural history |
| ISBN | : |
| Author | : Luigi Boitani |
| Publisher | : Columbia University Press |
| Total Pages | : 668 |
| Release | : 2000-06-01 |
| Genre | : Science |
| ISBN | : 0231501390 |
The present biodiversity crisis is rife with opportunities to make important conservation decisions; however, the misuse or misapplication of the methods and techniques of animal ecology can have serious consequences for the survival of species. Still, there have been relatively few critical reviews of methodology in the field. This book provides an analysis of some of the most frequently used research techniques in animal ecology, identifying their limitations and misuses, as well as possible solutions to avoid such pitfalls. In the process, contributors to this volume present new perspectives on the collection, analysis, and interpretation of data. Research Techniques in Animal Ecology is an overarching account of central theoretical and methodological controversies in the field, rather than a handbook on the minutiae of techniques. The editors have forged comprehensive presentations of key topics in animal ecology, such as territory and home range estimates, habitation evaluation, population viability analysis, GIS mapping, and measuring the dynamics of societies. Striking a careful balance, each chapter begins by assessing the shortcomings and misapplications of the techniques in question, followed by a thorough review of the current literature, and concluding with possible solutions and suggested guidelines for more robust investigations.
