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Author: Michael Schmid
Publisher: S. Karger AG (Switzerland)
ISBN: 9783805596077
Category : Frogs
Languages : en
Pages : 0
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Book Description
'The Chromosomes of Terraranan Frogs' is the most comprehensive, original and comparative cytogenetic study of vertebrates ever performed, presenting results obtained over a 36-year period of more than 70 expeditions to the Neotropics (Central and South America and the Caribbean) and from several laboratories (Canada, Costa Rica, Cuba, Germany, USA, and Venezuela). The karyotypes and genomes of 227 recognized species and 2,548 individual specimens of Terrarana were examined using a variety of staining techniques, molecular probe in situ hybridization, and genome size measurements. Furthermore, all previously published data on the cytogenetics of Terrarana have been included. The karyotype characters were mapped onto the molecular phylogeny obtained by analyses of several mitochondrial and nuclear genes. This allowed reconstruction of the various karyophylogenies as well as calculation of the chromosomal mutation rates. The results were always interpreted in context with the cytogenetic data published for other amphibian taxa or vertebrates. The general properties of eukaryote chromosomes, the rules governing structural and numerical chromosome repatterning as well as the principles of chromosome evolution are explained. An extensive 'Material and Methods' section was compiled with the intention of providing the necessary guidance for everyone interested in studying amphibian chromosomes. This monograph provides detailed current and archival information on terraranan karyotypes and genomes to colleagues who are already recognized specialists in amphibian or vertebrate cytogenetics. It is also valuable reading for herpetologists involved in the evolution of neotropical amphibians and provides comprehensive insights into vertebrate cytogenetics for students.
Author: Michael Schmid
Publisher: S. Karger AG (Switzerland)
ISBN: 9783805596077
Category : Frogs
Languages : en
Pages : 0
Get Book Here
Book Description
'The Chromosomes of Terraranan Frogs' is the most comprehensive, original and comparative cytogenetic study of vertebrates ever performed, presenting results obtained over a 36-year period of more than 70 expeditions to the Neotropics (Central and South America and the Caribbean) and from several laboratories (Canada, Costa Rica, Cuba, Germany, USA, and Venezuela). The karyotypes and genomes of 227 recognized species and 2,548 individual specimens of Terrarana were examined using a variety of staining techniques, molecular probe in situ hybridization, and genome size measurements. Furthermore, all previously published data on the cytogenetics of Terrarana have been included. The karyotype characters were mapped onto the molecular phylogeny obtained by analyses of several mitochondrial and nuclear genes. This allowed reconstruction of the various karyophylogenies as well as calculation of the chromosomal mutation rates. The results were always interpreted in context with the cytogenetic data published for other amphibian taxa or vertebrates. The general properties of eukaryote chromosomes, the rules governing structural and numerical chromosome repatterning as well as the principles of chromosome evolution are explained. An extensive 'Material and Methods' section was compiled with the intention of providing the necessary guidance for everyone interested in studying amphibian chromosomes. This monograph provides detailed current and archival information on terraranan karyotypes and genomes to colleagues who are already recognized specialists in amphibian or vertebrate cytogenetics. It is also valuable reading for herpetologists involved in the evolution of neotropical amphibians and provides comprehensive insights into vertebrate cytogenetics for students.
Author: Pamela S. Soltis
Publisher: Springer Science & Business Media
ISBN: 3642314422
Category : Science
Languages : en
Pages : 417
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Book Description
Polyploidy – whole-genome duplication (WGD) – is a fundamental driver of biodiversity with significant consequences for genome structure, organization, and evolution. Once considered a speciation process common only in plants, polyploidy is now recognized to have played a major role in the structure, gene content, and evolution of most eukaryotic genomes. In fact, the diversity of eukaryotes seems closely tied to multiple WGDs. Polyploidy generates new genomic interactions – initially resulting in “genomic and transcriptomic shock” – that must be resolved in a new polyploid lineage. This process essentially acts as a “reset” button, resulting in genomic changes that may ultimately promote adaptive speciation. This book brings together for the first time the conceptual and theoretical underpinnings of polyploid genome evolution with syntheses of the patterns and processes of genome evolution in diverse polyploid groups. Because polyploidy is most common and best studied in plants, the book emphasizes plant models, but recent studies of vertebrates and fungi are providing fresh perspectives on factors that allow polyploid speciation and shape polyploid genomes. The emerging paradigm is that polyploidy – through alterations in genome structure and gene regulation – generates genetic and phenotypic novelty that manifests itself at the chromosomal, physiological, and organismal levels, with long-term ecological and evolutionary consequences.
Author: Neftalí Ríos-López
Publisher: Pelagic Publishing Ltd
ISBN: 178427268X
Category : Science
Languages : en
Pages : 568
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Book Description
An expansive and detailed review of the biology of Caribbean amphibians, considering their threats, conservation and outlook in a changing world. Amphibians are the group of vertebrates undergoing the fastest rate of extinction; it is urgent that we understand the causes of this and find means of protecting them. This landmark illustrated volume brings together the leading experts in the field. As well as offering an overview of the region as a whole, individual chapters are devoted to each island or island-group and the measures used to protect their amphibians through legislation or nature reserves. The biological background of insular biogeography, including its methods, analysis and results, is reviewed and applied specifically to the problems of Caribbean amphibians – this includes a re-examination of patterns and general ideas about the status of amphibians in the Anthropocene. The Conservation and Biogeography of Amphibians in the Caribbean offers an important baseline against which future amphibian conservation can be measured in the face of climate change, rising sea level and a burgeoning human population. Covers over 300 species.
Author: Kazuya Kobayashi
Publisher: Springer
ISBN: 4431566090
Category : Science
Languages : en
Pages : 783
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Book Description
This book provides new insights into the universality of biological systems in animal reproduction and development by a comparative study of a variety of mechanisms in animals ranging from basal invertebrates to vertebrates, including mammals. Animals accomplish genetic diversity through meiosis and fertilization, and during embryogenesis animals must produce specialized cell types, including germ cells, in accordance with their individual body plan. This series of phenomena is essential to the continuity of life in the animal kingdom, and animals show various reproductive and developmental strategies. This volume, comprising four parts, reviews animal kingdom diversity, including reproductive strategies and germ cell differentiation mechanisms (Part 1), sex determination and differentiation (Part2), the mechanisms of fertilization (Part 3), and body axis formation (Part 4). Readers will find descriptions of the reproduction or development of 180 species, 13 phyla, 35 classes, 74 orders, 117 families, and 151 genera in this book. Of particular interest is the diversity of molecules and mechanisms used to achieve the same biological purpose in different animals. Undergraduates, graduate students, and professional scientists who want a deeper understanding of animal reproductive and developmental mechanisms will find this book to be of great value.
Author: Yuan-Chuan Chen
Publisher: BoD – Books on Demand
ISBN: 183880031X
Category : Science
Languages : en
Pages : 212
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Book Description
Gene expression is the most fundamental level at which genotype gives rise to phenotype, which is an obvious, observable, and measurable trait. Phenotype is dependent on genetic makeup of the organism and influenced by environmental conditions. This book explores the significance, mechanism, function, characteristic, determination, and application of gene expression and phenotypic traits.
Author: David O. Norris
Publisher: Elsevier
ISBN: 044316021X
Category : Science
Languages : en
Pages : 318
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Book Description
Hormones and Reproduction of Vertebrates, Volume 2: Amphibians is the second of five second-edition volumes representing a comprehensive and integrated overview of hormones and reproduction in fishes, amphibians, reptiles, birds, and mammals. The book includes coverage of endocrinology, neuroendocrinology, physiology, behavior, and anatomy of amphibian reproduction. It provides a broad treatment of the roles of pituitary, thyroid, adrenal, and gonadal hormones in all aspects of reproduction, as well as descriptions of major life history events. New to this edition is a concluding assessment of the effect of environmental influences on amphibians. Initial chapters in this book broadly examine sex determination, reproductive neuroendocrinology, stress, and hormonal regulation as it relates to male and female reproductive structure and function. Subsequent chapters examine hormones and reproduction of specific taxa, including anuran amphibians, urodeles, and gymnophionids. The book concludes with an examination of endocrine disruption of reproduction in amphibians. Hormones and Reproduction of Vertebrates, Volume 2: Amphibians is designed to provide a readable, coordinated description of reproductive basics in amphibians, as well as an introduction to the latest trends in reproductive research and a presentation of our understanding of reproductive events gained over the past decade. It may serve as a stand-alone reference for researchers and practitioners in the field of herpetology or as one of five coordinated references aligned to provide topical treatment across vertebrate taxa for researchers, practitioners, and students focused on vertebrate endocrinology. - Covers endocrinology, neuroendocrinology, physiology, behavior, anatomy, and development of amphibian reproduction - Includes pituitary, thyroid, adrenal, and gonadal hormones - Focuses on anuran, urodele, and gymnophiona amphibians - Provides new coverage on environmental disruption in amphibians
Author: Paul A. Hohenlohe
Publisher: Springer Nature
ISBN: 3030634892
Category : Science
Languages : en
Pages : 559
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Book Description
Population genomics is revolutionizing wildlife biology, conservation, and management by providing key and novel insights into genetic, population and landscape-level processes in wildlife, with unprecedented power and accuracy. This pioneering book presents the advances and potential of population genomics in wildlife, outlining key population genomics concepts and questions in wildlife biology, population genomics approaches that are specifically applicable to wildlife, and application of population genomics in wildlife population and evolutionary biology, ecology, adaptation and conservation and management. It is important for students, researchers, and wildlife professionals to understand the growing set of population genomics tools that can address issues from delineation of wildlife populations to assessing their capacity to adapt to environmental change. This book brings together leading experts in wildlife population genomics to discuss the key areas of the field, as well as challenges, opportunities and future prospects of wildlife population genomics.
Author: Andreas Houben
Publisher: Springer My Copy UK
ISBN: 9783805592123
Category : Aufsatzsammlung
Languages : en
Pages : 0
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Book Description
Our understanding of the function and structure of chromosomes and their interrelationship has grown in recent years. The chapters in this issue describe the advances that have been made possible by combining microscope techniques with sophisticated biochemical and genetic approaches to unlock the secrets of chromosomes. The authors look at many aspects of chromosome biology, such as protein, DNA and RNA composition of chromosomes, defined chromosome structures, unusual chromosome structures and specialized chromosomes and microscope tools for chromosome analysis. 'Chromosome Structure and Function' will be an invaluable resource for undergraduate and postgraduate students in fields such as plant and animal sciences, genetics, and molecular biology. In fact, any student, teacher or researcher interested in chromosome biology will find this special issue indispensable.
Author: Valentí Rull
Publisher: Springer Nature
ISBN: 3030311678
Category : Science
Languages : en
Pages : 816
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Book Description
This book provides a comprehensive overview of the patterns of biodiversity in various neotropical ecosystems, as well as a discussion on their historical biogeographies and underlying diversification processes. All chapters were written by prominent researchers in the fields of tropical biology, molecular ecology, climatology, paleoecology, and geography, producing an outstanding collection of essays, synthetic analyses, and novel investigations that describe and improve our understanding of the biodiversity of this unique region. With chapters on the Amazon and Caribbean forests, the Atlantic rainforests, the Andes, the Cerrado savannahs, the Caatinga drylands, the Chaco, and Mesoamerica – along with broad taxonomic coverage – this book summarizes a wide range of hypotheses, views, and methods concerning the processes and mechanisms of neotropical diversification. The range of perspectives presented makes the book a truly comprehensive, state-of-the-art publication on the topic, which will fascinate both scientists and general readers alike.
Author: David L. Jameson
Publisher:
ISBN:
Category : Evolution
Languages : en
Pages : 360
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Book Description
The nature of populations, races, subspecies, and species. Genetic basis of isolation. Origin of isolation - theoretical. Origin of isolation - experimental. The nature of the speciation process.
