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Book Population Genetics and Metapopulation Structuring of the Wood Frog Rana Sylvatica in the Kenai National Wildlife Refuge Alaska

Download or read book Population Genetics and Metapopulation Structuring of the Wood Frog Rana Sylvatica in the Kenai National Wildlife Refuge Alaska written by Margaret K. Perdue and published by . This book was released on 2009 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Contaminants as Contributing Factors to Wood Frog Abnormalities on the Kenai National Wildlife Refuge Alaska

Download or read book Contaminants as Contributing Factors to Wood Frog Abnormalities on the Kenai National Wildlife Refuge Alaska written by Mari Kathryn Reeves and published by . This book was released on 2008 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: Between 2004 and 2006 biologists assessed 38 breeding sites for prevalence of abnormal wood frogs in the Kenai National Wildlife Refuge. For 21 ponds variables known to cause abnormalities in amphibians were measured: ultraviolet-B radiation, temperature, water quality, contaminants, and abundance of predatory invertebrates. Of 5,716 metamorphic wood frogs examined, 450 had skeletal or eye abnomalities representing over 25 abnormality types. Intersex frogs were examined for abnormal gonadal morphology.

Book Observations on the Wood Frog Rana Sylvatica in Alaska

Download or read book Observations on the Wood Frog Rana Sylvatica in Alaska written by Kjell Johansen and published by . This book was released on 1961 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Age Structure of a Northern Prairie Population of Wood Frogs Rana Sylvatica

Download or read book Age Structure of a Northern Prairie Population of Wood Frogs Rana Sylvatica written by Kyla Kae Schneider and published by . This book was released on 2004 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book The Effects of Season and Temperature on Certain Aspects of the Physiology of the Alaskan Wood Frog Rana Sylvatica

Download or read book The Effects of Season and Temperature on Certain Aspects of the Physiology of the Alaskan Wood Frog Rana Sylvatica written by Raymond S. Hadley and published by . This book was released on 1969 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book The Genetic Population Structure of Rana Sylvatica in Itasca State Park Minnesota

Download or read book The Genetic Population Structure of Rana Sylvatica in Itasca State Park Minnesota written by Tina M. Squire and published by . This book was released on 1999 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Fine scale Kinematic and Genetic Variation Among Populations of the Wood Frog Rana Sylvatica

Download or read book Fine scale Kinematic and Genetic Variation Among Populations of the Wood Frog Rana Sylvatica written by Liam Philip Arthur Frape and published by . This book was released on 2010 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Colonizing Northern Landscapes

Download or read book Colonizing Northern Landscapes written by Andrée-Michelle D'Aoust-Messier and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The genetic structuring of populations can be influenced by present processes and past events. One of the largest historical events to affect the distribution and genetic characteristics of present-day North American biota is the Pleistocene glaciation. Thus, the study of post-glacial colonization patterns of species in northern landscapes can relay important ecological information, as species had to expand their range extensively following the retreat of the glaciers and are often at the terminal end of their expansion. These species consequently exhibit the genetic fingerprints of sequential founder events, in turn decreasing the genetic variation available for adaptation. Using amphibians to investigate post-glacial range expansion is advantageous, as they have limited dispersal abilities revealing fine-scale patterns and they are thought to be one of the first vertebrates to colonize post-glacial habitat. Therefore, to model the phylogeography of a primary colonizer and the population structure of anurans in northern landscapes, population genetics analyses of wood frogs (Lithobates sylvaticus) were performed in the James Bay area. Wood frogs were sampled from 17 localities around James Bay and genetic analyses were conducted with seven microsatellite loci and mitochondrial DNA sequences of the ND2/tRNATRP genes. Results show that the post-glacial recolonization of the James Bay area by wood frogs originated from the putative refugium in western Wisconsin, an area known as the Driftless Area. Two routes were taken by founders to colonize the James Bay area: one north-west of Lake Superior, colonizing western Ontario, and one through the Upper Peninsula of Michigan, colonizing southern and eastern Ontario and western Québec. Interestingly, the meeting of the two lineages south-west of James Bay led to the establishment of a zone of higher genetic variation than expected under the founder effect hypothesis. Additionally, population structure analyses revealed the segregation of three genetic populations east, north-west, and south-west of the bay, the latter showing the highest genetic variation and likely representing a zone of secondary contact. This study shows that past events such as post-glacial range expansions can explain present patterns of genetic variation and population structure, and that studies in northern landscapes may be very useful in understanding genetic patterns throughout the range of a species.

Book Population and Conservation Genetic Structure of the Cascades Frog Rana Cascadae Throughout the Species Range

Download or read book Population and Conservation Genetic Structure of the Cascades Frog Rana Cascadae Throughout the Species Range written by Kirsten J. Monsen and published by . This book was released on 2002 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: A major goal of conservation biology is to elucidate the population genetic structure in threatened species and assess the relative importance of the evolutionary forces that shape that population genetic structure. I conducted three studies in the declining amphibian Rana cascadae to assess levels of population genetic differentiation and the relative importance of gene flow versus random genetic drift throughout the species' range. In the first study, 1 examined phylogeographic structure on a species-wide geographic scale with both mitochondrial and nuclear molecular markers. I found three mitochondrial groups within R. cascadae that are as divergent at the mitochondrial DNA as sister species. However, I only found two nuclear groups within R. cascadae, suggesting there are two Distinct Population Segments and three Management Units within the species' range. In the second study, I compared sequence data from mtDNA and nuclear DNA of the three R. cascadae mtl)NA groups to several closely related Pacific Northwestern ranid species. I found the surprising result that the mtDNA of R. aurora aurora is more closely related to the mtDNA of' R. cascadae than to the mtDNA of its own subspecies R. aurora drayloni. The nuclear data support the sub-specific relationship between R. aurora aurora and R. aurora draytoni. This result is most likely due to incomplete lineage sorting of ancestral mtDNA alleles. Finally, in the third study, I examined the relative importance of gene flow versus random genetic drift on a fine geographic scale using microsatellite loci. Additionally, I estimated the long-term effective population sizes and genetic neighborhood size for 11 R. cascadae populations. Rana cascadae shows extreme isolation by distance with very little gene flow occurring past a distance of 10 km. Long-term effective population sizes were unrealistically large for current effective population sizes, but the estimates oF genetic neighborhood size are consistent with those expected based on current census population size and genetic neighborhood size in other amphibians. My research suggests Rana cascadae should be managed as three separate groups corresponding to the Olympic Peninsula, the Cascades of Washington and Oregon, and Northern California. Additionally, R. cascadae exhibits extreme isolation by distance with reduced gene flow at distances greater than 10 km, suggesting metapopulation structure is weak, and populations that go extinct are unlikely to be re-colonized quickly despite the presence of nearby R. cascadae populations.