Download or read book Development and Evolution of the Dusky Salamanders Genus Desmognathus written by Sharyn Beth Marks and published by . This book was released on 1995 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Serological Investigation of Three Western Populations of Dusky Salamanders Genus Desmognathus with Comments on the Establishment of the Population on Crowley s Ridge written by Max Allen Nickerson and published by . This book was released on 1979 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book EVOLUTIONARY ECOLOGY STUDIES ON SALAMANDERS OF THE GENUS Desmognathus PART 1 COMPETITIVE EXCLUSION ALONG A HABITAT GRADIENT BETWEEN TWO SPECIES OF SALAMANDERS IN WEST FLORIDA PART 2 LIFE HISTORY GROWTH AND BODY SIZE VARIATION IN POPULATIONS OF A STREAM SIDE SALAMANDER Desmognathus Brimleyorum ON ADJACENT MOUNTAINS written by and published by . This book was released on 1975 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environment Development and Evolution written by Brian Keith Hall and published by MIT Press. This book was released on 2004 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Leading researchers in evolutionary developmental biology seek linkages between, and a synthesis of, development, physiology, endocrinology, ecology, and evolution. Evolutionary developmental biology, also known as evo-devo or EDB, seeks to find links between development and evolution by opening the "black box" of development's role in evolution and in the evolution of developmental mechanisms. In particular, this volume emphasizes the roles of the environment and of hormonal signaling in evo-devo. It brings together a group of leading researchers to analyze the dynamic interaction of environmental factors with developmental and physiological processes and to examine how environmental signals are translated into phenotypic change, from the molecular and cellular level to organisms and groups of organisms. Taken together, these chapters demonstrate the crucial roles of those processes of genetic, developmental, physiological, and hormonal change that underpin evolutionary change in development, morphology, physiology, behavior, and life-history. Part I investigates links between environmental signals and developmental processes that could be preserved over evolutionary time. Several contributors evaluate the work of the late Ryuichi Matsuda, especially his emphasis on the role of the external environment in genetic change and variability ("pan-environmentalism"). Other contributors in part I analyze different aspects of environmental-genetic-evolutionary linkages, including the importance of alternate ontogenies in evolution and the paradox of stability over long periods of evolutionary time. Part II examines the plasticity that characterizes much of development, with contributors discussing such topics as gene regulatory networks and heterochronicity. Part III analyzes the role of hormones and metamorphosis in the evolution of such organisms with alternate life-history stages as lampreys, amphibians, and insects.
Download or read book Evolutionary Ecology Studies on Salamanders of the Genus Desmognathus written by Donald Bruce Means and published by . This book was released on 1975 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Biology of Plethodontid Salamanders written by Richard C. Bruce and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume offers a state-of-the-art overview of plethodontid salamanders. Readers will find the best current understanding of many aspects of the evolution, systematics, development, morphology, life history, ecology, and field methodology of these animals.
Download or read book Rectifying Limitations on Species Delineation in Dusky Salamanders written by David A. Beamer and published by . This book was released on 2015 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dusky salamanders (Desmognathus) constitute a large, species-rich group, and although a considerable body of literature exists on systematic relationships and adaptive trends, these issues have heretofore been approached in piecemeal fashion. Recent work has revealed Desmognathus to be far more lineage rich than previously imagined and demonstrated just how complex the taxon's evolutionary history has been. These recent advances underscore the need for additional sampling in areas and within lineages that have thus far been sparsely evaluated. I conceived and implemented a sampling regimen involving level IV ecoregion X independent river drainages designed for the comprehensive recovery of all genealogically exclusive lineages within the genus. I sampled over 550 populations across the range-wide distribution of described dusky salamander species and generated mtDNA sequence data for each population. A Bayesian phylogenetic reconstruction of the resulting haplotypes revealed forty-five independent evolutionary lineages, eleven of which have never been included in a comprehensive phylogenetic reconstruction and three of which have not been included in any molecular systematic survey. Although general limitations associated with mtDNA data preclude delineation of new species, I have redefined several species complexes and have also erected new informal species complexes. The dataset assembled here, which contains topotypic samples for all currently recognized species as well as most synonymies, should serve as a robust framework for future efforts to delimit species within Desmognathus.
Download or read book Evolutionary Trends in the Salamanders of the Genus Desmognathus with Special Reference to Some Skeletal Differences written by Charles Henry Turver and published by . This book was released on 1950 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A New Subspecies of Dusky Salamander Genus Desmognathus from South Central Florida written by Wilfred T. Neill and published by . This book was released on 1951 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Phylogenetics and Population Status of Coastal Plain Dusky Salamanders Amphibia Caudata Plethodontidae written by David A. Beamer and published by . This book was released on 2004 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Towards Rectifying Limitations on Species Delineation in Dusky Salamanders Desmognathus Plethodontidae written by David A. Beamer and published by . This book was released on 2020 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Abstract: Dusky salamanders (Desmognathus) constitute a large, species-rich group within the family Plethodontidae, and though their systematic relationships have been addressed extensively, most studies have centered on particular species complexes and therefore offer only piecemeal phylogenetic perspective on the genus. Recent work has revealed Desmognathus to be far more clade rich--35 reciprocally monophyletic clades versus 22 recognized species--than previously imagined, results that, in turn, provide impetus for additional survey effort within clades and across geographic areas thus far sparsely sampled. We conceived and implemented a sampling regime combining level IV ecoregions and independent river drainages to yield a geographic grid for comprehensive recovery of all genealogically exclusive clades. We sampled over 550 populations throughout the distribution of Desmognathus in the eastern United States of America and generated mitochondrial DNA sequence data (mtDNA; 1,991 bp) for 536 specimens. A Bayesian phylogenetic reconstruction of the resulting haplotypes revealed forty-five reciprocally monophyletic clades, eleven of which have never been included in a comprehensive phylogenetic reconstruction, and an additional three not represented in any molecular systematic survey. Although general limitations associated with mtDNA data preclude new species delineation, we profile each of the 45 clades and assign names to 10 new clades (following a protocol for previous clade nomenclature). We also redefine several species complexes and erect new informal species complexes. Our dataset, which contains topotypic samples for nearly every currently recognized species and most synonymies, will offer a robust framework for future efforts to delimit species within Desmognathus. Keywords: Amphibia, Caudata, Desmognathus, mtDNA phylogeny, level IV ecoregion X independent drainage sampling, new clades"--Page 3.
Download or read book Allometry Life History and the Evolution of the Desmognathine Salamanders written by Samuel Spender Sweet and published by . This book was released on 1973 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development and Evolution of Feeding Behavior and Functional Morphology in Salamanders of the Family Plethodontidae written by Stephen Mark Deban and published by . This book was released on 1997 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Phylogenetic History Morphological Parallelism and Speciation in a Complex of Appalachian Salamanders genus Desmognathus written by Nathan D. Jackson and published by . This book was released on 2005 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding the mechanisms that generate shared morphologies across closely related taxa is important when identifying distinct evolutionary lineages using morphological characters. Desmognathus salamanders are an ideal group for testing hypotheses concerning the correlation between morphological similarity and genetic exchange within and among nominal species due to a pattern of high discordance between the two. Phylogeographic hypotheses are tested for populations of the D. quadramaculatus species complex throughout southern Appalachia by combining phylogenetic and population genetic methods with geographical information. Phylogenetic and phylogeographic inferences are then assessed in conjunction with morphological characteristics that have traditionally diagnosed taxonomic entities to understand the genetic basis of shared morphology in this complex, and to assess species boundaries. A history of fragmentation followed by range expansion is suggested as a recurrent pattern that has shaped the current population structure within this complex. The current taxonomy is found to unite populations that share similar morphologies due to parallel evolution rather than ancestry. We suggest revisions in taxonomy that will better reflect the evolutionary history of these lineages. Appreciation of the hidden genetic variation and homoplasious morphological variation often present in and among salamander species can foster the implementation of more appropriate methods for detecting and recognizing the complex history of these organisms.
Download or read book Evolutionary Ecology Studies on Salamanders of the Genus Desmognathus written by D. Bruce Means and published by . This book was released on 1975 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wildlife Abstracts written by U.S. Fish and Wildlife Service and published by . This book was released on 1976 with total page 826 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structure of a Contact Zone written by Lizmarie López and published by . This book was released on 2008 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
