Download or read book Cytological Studies on Dipnoi Urodela Anura and Emys written by Torsten Wickbom and published by . This book was released on 1944 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Genetics written by and published by Academic Press. This book was released on 1955-01-01 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Genetics
Download or read book Animal Species For Developmental Studies written by T.A. Dettlaff and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is a revised and augmented edition of part of the book Ob"ekty Biologii Razvitiya (Animal Species for Developmental Studies) published in Rus sian in 1975 in the series of monographs Problemy Biologii Razvitiya (Problems of Developmental Biology) by Nauka Publishers, Moscow. That book described the development of organisms most frequently used in developmental biology studies. Data were provided for 22 animal species, belonging to different taxa, from protists to mammals. For the English edition we decided to divide the original book into two parts dealing with vertebrates and invertebrates, respectively. This volume deals with vertebrate species. When choosing these species, their advantages for laboratory studies, infonnation available, and availability for experimentation in the USSR and in Europe were taken into account. This geographical criterion explains the absence in the book of a number of species widely used in the laboratories of the USA, Japan, and other countries, such as Rana pipiens, Cynops pyrrhogaster, and others. Besides the classical laboratory animals, some fish have been described since the study of the mechanisms of their development and attempts to control their on togenesis are of immediate value and the results obtained can be tested on the mass material. A study of the development of laboratory mammals is of special interest since current problems of modern medicine and veterinary sciences are tackled using these animals.
Download or read book Amphibian Cytogenetics and Evolution written by David M. Green and published by Academic Press. This book was released on 2012-12-02 with total page 475 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book appears at a time when molecular cytogenetics is positioned to make a significant impact upon evolutionary studies, enabling problems of chromosomal structure and change to be critically assessed. It is an up-to-date and comprehensive survey of the cytogenetics of a major class of animals, including all three amphibian orders, with chapters authored by international leaders in the field.Amphibian Cytogenetics and Evolution will be of interest to classical and molecular cytogeneticists, systematicists, evolutionary biologists, herpetologists, and anyone using amphibians in genetic research. Offers the only current and comprehensive survey of amphibian cytogenetics Gives authoritative and in-depth coverage of topics of present interest Reviews general cytogenetic topics Presents new insights into evolutionary changes in chromosome structure and amphibian phylogeny and relationships including: Phylogenetic analysis of chromosome data, Current techniques of cytogenetic analysis, Examination of all three amphibian orders
Download or read book Reptiles and Amphibians written by David Aguillón-Gutiérrez and published by BoD – Books on Demand. This book was released on 2018-07-18 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book Reptiles and Amphibians is a compilation of the current trends in herpetology, focusing on evolution, physiology, monitoring, bioacoustics, threats, and conservation biology. All the chapters present an interesting aspect of the biology of reptiles and amphibians, encompassing different groups of these animals such as frogs, toads, newts, chelonians and snakes from various parts of the world. Without a doubt, this book will help to keep updated on the current problems that arise in this interesting biological group.
Download or read book The Reproductive Biology of Amphibians written by D. Taylor and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 473 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Chromosome Complement written by Bernard John and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt: material can serve both autocatalytic and heterocatalytic functions. Thus not only is it unique in itB capacity for self-replication but its base sequence determines the specificity of proteins. And enzyme proteins are immediately responsible for the peripheral metabolism which enables the organism to impose its own kind of order on the raw materials it absorbs. The course of development is determined not only by the nature of the genetic material but by its over-all amount and the relative frequency of the different functional units. Differential rates of epigenetic activity matter also. In theory, therefore, differential development within or even between individuals could be determined by the differential replication of the various genetic elements or by their differential activity. And further variation could arise by the differential transmission of these elements between cells. Indeed it would appear that all these possibilities are exploited by living systems. If like is to beget like, however, any genetic change which occurs during development must be undone, or else germinal units preserved from change must be set aside. As far as is known, genetic changes, even those involving only quantity or relative amounts, are reversible to only a very limited extent so that a change once done cannot be undone. Consequently genetic changes during the development of presumptive germ-lines are either non existant or minor and confined to a small class of un aggregated deter minants.
Download or read book Fish Karyotypes written by Ryoichi Arai and published by Springer Science & Business Media. This book was released on 2011-06-26 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: As the largest group of extant vertebrates, fish offer an almost limitless number of striking examples of evolutionary adaptation to environmental and biotic selection pressure. The most diverse of all vertebrate groups, the higher taxa of fish traditionally have been classified by morphology and paleontology, with a much smaller input of cytogenetic information. DNA sequence data are exerting an increasingly strong influence on modern fish systematics, challenging the classification of numerous higher taxa ranging from genera to orders. The most fruitful approach, however, involves synthetic analyses of morphology, molecular phylogenetics, comparative karyology, and genome size. Karyotypes of more than 3400 species/subspecies are arranged here by fish systematics and include a list of genome size, sex chromosomes, B chromosomes, polyploidy, and locality of material fish, among others. This volume enables both beginners and advanced researchers to survey the existing literature and facilitates the implementation of an integrative approach to fish systematics. The first book on fish chromosomes in nearly 15 years, it is also the most comprehensive.
Download or read book Amphibians of Central and Southern Africa written by Alan Channing and published by Cornell University Press. This book was released on 2019-06-07 with total page 527 pages. Available in PDF, EPUB and Kindle. Book excerpt: Amphibians of Central and Southern Africa is the first comprehensive guide to the frogs, toads, and caecilians of the ten sub-equatorial African countries—Angola, Botswana, Lesotho, Malawi, Mozambique, Namibia, South Africa, Swaziland, Zambia, and Zimbabwe. The result is at once a valuable reference tool, a field guide, and a source of ideas for future research.A source of increasing interest in their own right, amphibians are also benchmark species for biodiversity, and are used as laboratory animals in many of the sciences. In the wild, amphibians, especially frogs, act as natural monitors of water quality and are invaluable in pest control. Their skins secrete a wide range of pharmacologically active substances, such as antibiotics and painkillers. Yet frog populations are declining worldwide, mainly due to human destruction of their habitats. Alan Channing synthesizes information published over the last century to provide the first natural history and a portrait of the amphibian fauna of this vast region.Key features of Amphibians of Central and Southern Africa include*detailed accounts for 205 species of frogs and toads (and 2 species of caecilian) accompanied by color illustrations, distribution maps, details of breeding and tadpole behavior, and call descriptions*illustrations and tadpole identification keys for each genus*special sections for some species with topics such as "skin toxins"*an overview of fossil frogs, a discussion of humankind and frogs in Africa, and a bibliography of African frog biology
Download or read book Biodiversity Dynamics and Conservation written by C. Lévêque and published by Cambridge University Press. This book was released on 1997-05-13 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a comprehensive book on the biodiversity of one of the most diverse ecosystems known - tropical freshwater.
Download or read book Biology of Amphibian Tumors written by Merle Mizell and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 499 pages. Available in PDF, EPUB and Kindle. Book excerpt: New Orleans has a distinguished history as a center for medical and biological learning, a history shared by Tulane University, its School of Medicine, and its Bio logical and Medical Sciences departments. This background made it especially fitting that the University, in conjunction with the Cancer Association of Greater New Orleans, Inc. and the National Cancer Institute, should sponsor the "Symposium: Biology of Amphibian Tumors" held October 28, 29, 30, 1968. The University wishes to express its appreciation to the Cancer Association for its assistance in making the Symposium possible and to acknowledge the support made available through the Bio medical Sciences Support Grant program of the National Institutes of Health. As the title of this volume indicates, the Symposium yielded valuable results in the area of cancer research and it stands to stimulate further efforts in this most important field. Some notion of the impact of this symposium is suggested by the broad range of the 200 participants it attracted. They came not only from the breadth and length of the U.S., but from abroad, from France, England, Austria, and Italy.
Download or read book Current List of Medical Literature written by and published by . This book was released on 1946 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes section, "Recent book acquisitions" (varies: Recent United States publications) formerly published separately by the U.S. Army Medical Library.
Download or read book Cytological Studies of Melaniidae with Special Reference to Parthenogenesis and Polyploidy written by Joseph Jacob and published by . This book was released on 1959 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Publ Herpetol written by and published by . This book was released on 1973 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Animal Cytology Evolution written by Michael James Denham White and published by . This book was released on 1954 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: The nature of the evolutionary process; Chromosome structure; Salivary gland chromosomes; The mechanism of structural rearrangements; The mechanism of meiosis; Meiosis in strucutural heterozygotes; Chromosomal poymorphism in natural populations; Supernumery chromosomes in natural populations; Evolution of meiosis and athe chromosome cycle; Hybridization as a technique of experimental taxonomy and the causes of hybrid sterility; The evolution of sex determination; Simple sexchromosome mechanisms; Multiple sexchromosome; Sex determination by male haploidey. The evolution of pasthenogenesis.
Download or read book A Karyotype Analysis of the Genus Xenopus Anura Pipidae written by Janina Tymowska and published by . This book was released on 1976 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
