Download or read book A Morphometric Analysis of Geographic Variation Within Sorex Monticolus Insectivora Soricidae Classic Reprint written by Lois F. Alexander and published by Forgotten Books. This book was released on 2018-03 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from A Morphometric Analysis of Geographic Variation Within Sorex Monticolus (Insectivora, Soricidae) Straight - line polygons were drawn around the published marginal records (hall, 1981; Hennings and Hoffmann, 1977) for each subspecies to form the 14 a priori' groups (fig. Specimens from localities within a polygon were considered to belong to the taxon for which marginal records were used to produce that polygon. Specimens from localities outside of polygons (n z 107) were not included in the initial analyses, but were as signed to their appropriate groups by use of diagno sis files created with two or three-group discrimi nant analyses between geographically adjacent a priori groups. Because Carraway 1990) consid ered S. Bairdi a distinct species, and my results corroborated this, S. Bairdi (n 110) was used as an outgroup. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Download or read book Morphometric Analysis of Geographic Variation Within Sorex Monticolus Insectivora written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Morphometric Analysis of Geographic Variation Within Sorex Monticolus Insectivora written by Lois F. Alexander and published by . This book was released on 2013-10 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book.
Download or read book A Morphometric Analysis of Geographic Variation Within Sorex Monticolus Insectivora Soricidae written by H. Thomas Goodwin and published by . This book was released on 1995 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Morphometric Analysis of Geographic Variation Within Sorex Monticolus written by Lois F. Alexander and published by . This book was released on 1994 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shrews previously recognized as Sorex monticolus were classified into two species (one with 14 subspecies, the other monotypic) on the basis of a morphometric analysis of 3610 individuals from throughout their range. Sorex m. neomexicanus has been recognized previously as a subspecies of Sorex monticolus but is recognized herein as a distinct species. This taxon occurs in the Sacramento and Capitan mountains of New Mexico. This region possibly acted as a boreal-forest refugium for S. monticolus-type shrews during the Pleistocene glaciation, and during the warmer interglacial period, after the most recent glaciation, the valleys became too arid for survival and these shrews survived in forested, montane regions of New Mexico. These mountains are sufficiently isolated from other mountainous regions in the state to reduce or eliminate gene flow between these populations of shrews. S. monticolus as defined herein exhibits relatively little morphometric variation. Even among nominate races, the only obvious morphometric variation is a north-south cline in greatest length of skull. There is a general trend of increasing size from south to north. The southern subspecies restricted to isolated mountains (S. m. monticolus and S. m. parvidens) have the shortest skull lengths of all S. monticolus. The subspecies found in the northern coastal and insular areas of southeast Alaska and British Columbia (S. m. longicaudus, S. m. prevostensis, S. m. malitiosus, S. m. insularis, S. m. calvertensis, S. m. alascensis, and S. m. elassodon) have the longest skulls. S. m. setosus, S. m. isolatus, S. m. soperi, S. m. obscurus and S. m. shumaginensis all have skulls of intermediate length. Insular and coastal populations of S. monticolus have longer skulls than the S. monticolus that occupy the mainland. Shrews with long skulls that occur on the mainland (S. m. longicaudus and S. m. alascensis) also occur on some islands, and the mainland portion of their distributions are restricted to a narrow band along the coasts of Alaska and British Columbia. The southernmost subspecies of S. monticolus with short skulls are restricted to small montane islands. The morphometric variation among nominate races is sufficient to warrant continued separation at the subspecies level of all taxa except S. m. calvertensis and S. m. elassodon. Were it not for differences in pelage color, based on my morphometric analysis, S. m. calvertensis and S. m. elassodon should be synonomyzed.
Download or read book A Morphologic and Morphometric Analysis of the Relationships Within the sorex Vagrans Species Complex in the Pacific Coast Region written by Leslie N. Carraway and published by . This book was released on 1989 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shrews of the "Sorex vagrans species complex" were classified into nine taxa on the basis of morphologic and morphometric analyses of 2,299 specimens from Washington, west of the Cascade Mountains in Oregon, and in the Coast Ranges of California. In Washington, Sorex monticolus setosus and S. m. obscurus occur west and east of the Cascade Mountains, respectively. Oregon specimens heretofore considered S. m. bairdii were shown to possess morphometric differences sufficient to indicate they were specifically distinct from S. monticolus in Washington. The Columbia River may have acted as a barrier that led to a speciation event separating bairdii and monticolus. Seven specimens from Oregon, referred to S. m. setosus, were collected within 27 km of a landslide that dammed the Columbia River about 740 years ago. The slide probably was responsible for introduction of the taxon into Oregon. Holotypes of S. yaquinae (= S. pacificus yaquinae) and S. pacificus appear morphologically identical (the latter is damaged), thus the taxa were synonomized; the latter species name has priority. These shrews occur in the Oregon Coast Range from Taft, Lincoln Co., to Coquille, Coos Co., eastward to H.J. Andrews Experimental Forest, Linn Co., southward in the Cascade Mountains to near the California border. Sorex pacificus (= S.E. yaguinae) is morphometrically distinct from bairdii with which it is sympatric in the northern portion of its geographic range. Also, it is morphometrically distinct from shrews heretofore considered S. p. sonomae and S. p. pacificus and sympatric in the southern portion of its range with shrews formerly assigned to the latter taxon. Geographic variation within sonomae and pacificus is sufficient to warrant application of distinct trinomials to both taxa. Within my study area, S. vagrans exhibits no discernable geographic subunits. For all taxa, except S. vagrans, I found a relationship between latitude and the size of the projection on the medial edge of the first upper incisors from largest in the north to no projection in the south. This relationship likely is related to substantial differences in temperature, precipitation, and associated environmental factors over the 1,250 km from northern Washington south to San Francisco Bay, California. The southward reduction and ultimate loss of the median tine combined with the progressive enlargement of several skull characters associated with greater masticatory ability strongly suggests a dietary function for the median tine. Thus, changes in food resources of shrews in a southward direction in relation to increasing aridity and high temperatures possibly was the selective force responsible for reduction or loss of tines in southern taxa.
Download or read book Balkan Biodiversity written by Huw I. Griffiths and published by Springer Science & Business Media. This book was released on 2013-03-19 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first attempt to synthesize current understanding of biodiversity in the great European hot spot. A diverse group of international researchers offers perspective on biodiversity at the level of the gene, species and ecosystem, including contributions on temporal change. Biological groups include plants, mammals, spiders and humans, cave-dwelling organisms, fish, aquatic invertebrates and algae.
Download or read book A History of the Animal World in the Ancient Near East written by Billie Jean Collins and published by BRILL. This book was released on 2001-12-01 with total page 647 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is about all aspects of man’s contact with the animal world; sacrifice, sacred animals, diet, domestication, in short, from the sublime to the mundane. Chapters on art, literature, religion and animal husbandry provide the reader with a complete picture of the complex relationships between the peoples of the Ancient Near East and (their) animals. A reference guide and key to the menagerie of the Ancient Near East, with ample original illustrations.
Download or read book Shrews Chromosomes and Speciation written by Jeremy B. Searle and published by Cambridge University Press. This book was released on 2019-02-28 with total page 499 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents new insights into speciation through an in-depth analysis of extraordinary chromosomal variation in one species written by leading experts.
Download or read book Dynamic Zoogeography written by Miklos D.F. Unvardy and published by . This book was released on with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book San Diego County Mammal Atlas written by Scott Tremor and published by . This book was released on 2017 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: The new San Diego County Mammal Atlas serves as the definitive guide to the mammals of San Diego County, the biodiversity of which is one of the greatest in the United States. More than a decade in the making, the 432-page, full-color book covers the biology of all 91 terrestrial species and 31 inshore marine visitors known to have occurred in the county during recorded history (since 1769).
Download or read book Quaternary Paleoclimate written by W. C. Mahaney and published by Norwich [Norfolk] : Geo Abstracts. This book was released on 1981 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: 22 papers given at the fourth conference on Quaternary Research, May 18-20, 1979 which discuss methods of reconstructing paleoclimate.
Download or read book Introduction to Paleobiology and the Fossil Record written by Michael J. Benton and published by John Wiley & Sons. This book was released on 2013-04-25 with total page 1001 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a comprehensive overview of the science of the history of life. Paleobiologists bring many analytical tools to bear in interpreting the fossil record and the book introduces the latest techniques, from multivariate investigations of biogeography and biostratigraphy to engineering analysis of dinosaur skulls, and from homeobox genes to cladistics. All the well-known fossil groups are included, including microfossils and invertebrates, but an important feature is the thorough coverage of plants, vertebrates and trace fossils together with discussion of the origins of both life and the metazoans. All key related subjects are introduced, such as systematics, ecology, evolution and development, stratigraphy and their roles in understanding where life came from and how it evolved and diversified. Unique features of the book are the numerous case studies from current research that lead students to the primary literature, analytical and mathematical explanations and tools, together with associated problem sets and practical schedules for instructors and students. “..any serious student of geology who does not pick this book off the shelf will be putting themselves at a huge disadvantage. The material may be complex, but the text is extremely accessible and well organized, and the book ought to be essential reading for palaeontologists at undergraduate, postgraduate and more advanced levels—both in Britain as well as in North America.” Falcon-Lang, H., Proc. Geol. Assoc. 2010 “...this is an excellent introduction to palaeontology in general. It is well structured, accessibly written and pleasantly informative .....I would recommend this as a standard reference text to all my students without hesitation.” David Norman Geol Mag 2010 Companion website This book includes a companion website at: www.blackwellpublishing.com/paleobiology The website includes: · An ongoing database of additional Practical’s prepared by the authors · Figures from the text for downloading · Useful links for each chapter · Updates from the authors
Download or read book Cowen s History of Life written by Michael J. Benton and published by John Wiley & Sons. This book was released on 2019-10-07 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt: A newly revised and fully updated edition of the market-leading introduction to paleontology Designed for students and anyone else with an interest in the history of life on our planet, the new edition of this classic text describes the biological evolution of Earth’s organisms, and reconstructs their adaptations and the ecology and environments in which they functioned. Cowen's History of Life, 6th Edition includes major updates, including substantial rewrites to chapters on the origins of eukaryotes, the Cambrian explosion, the terrestrialization of plants and animals, the Triassic recovery of life, the origin of birds, the end-Cretaceous mass extinction, and human evolution. It also features new chapters on plants, soils and transformation of the land; the Mesozoic marine revolution; and the evolution of oceans and climates. Beginning with the origin of the Earth and the earliest life on earth, the book goes on to offer insightful contributions covering: the evolution of Metazoans; the early vertebrates; life of vertebrates on land; and early amniotes and thermoregulation. The book also looks at: dinosaur diversity, as well as their demise; early mammals; the rise of modern mammals; the Neogene Savannas; primates; life in the ice ages; and more. Covers the breadth of the subject in a concise yet specific way for undergrads with no academic background in the topic Reorganizes all chapters to reflect the geological series of events, enabling a new focus on big events Updated with three brand new chapters and numerous revised ones Put together by a new editorial team internationally recognized as the global leaders in paleontology Filled with illustrations and photographs throughout Includes diagrams to show internal structures of organisms, cladograms, time scales and events, and paleogeographic maps Supplemented with a dedicated website that explores additional enriching information and discussion, and which features images for use in visual presentations Cowen's History of Life, 6th Edition is an ideal book for undergraduate students taking courses in introductory paleontology, as well those on global change and earth systems.
Download or read book Hominoid Evolution and Climatic Change in Europe Volume 1 The Evolution of Neogene Terrestrial Ecosystems in Europe written by Jordi Agustí and published by Cambridge University Press. This book was released on 1999-10-07 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reconstructs European and Mediterranean climate over the last 20 million years in relation to human evolution.
Download or read book Neanderthals in Context written by R. N. E. Barton and published by Ousa Monograph. This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excavations at the adjacent sites of Gorham's Cave and Vanguard Cave have yielded a rich combination of archaeological and palaeoenvironmental finds covering a timespan of over 100,000 years. This volume deals with the primary results of the 1995-1998 excavations at both caves. The 24 chapters by leading specialists cover a range of topics from information concerning the nature and sequence of Middle Palaeolithic Neanderthal occupations to the reconstruction of the environmental context of these activities, based on proxy indicators such as sediments, charcoal, amphibians, reptiles, avifaunal remains, and small and large mammals. The Gibraltar evidence provides a rare insight into the lives of Neanderthals in a western Mediterranean coastal setting. It also presents site information on some of the last Neanderthal populations and the Middle to Upper Palaeolithic transition.
Download or read book Miscellaneous Invertebrates written by Andreas Schmidt-Rhaesa and published by Walter de Gruyter GmbH & Co KG. This book was released on 2018-12-03 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume of the Handbook of Zoology summarizes "small" groups of animals across the animal kingdom. Dicyemida and Orthonectida are enigmatic parasites, formerly united as "Mesozoa" and their position among the multicellular animals is still not known with certainty. Placozoa are small, flat marine animals which provide important information on metazoan evolution. Comb jellies (Ctenophora) are esthetically fascinating animals which cause considerable discussion about their phylogenetic position. Seisonida are closely related to rotifers and acanthocephalans. Cycliophora were discovered and described as one of the last higher taxa and surprise by their complex life cycle. Kamptozoa (= Entoprocta) are small sessile animals in the sea and sometimes also in freshwater. Arrow worms (Chaetognatha) play an important role as predators in the plankton, but they also include benthic forms. Pterobranchia and acorn worms (Enteropneusta) belong to the deuterostomia and are related to echinoderms. In particular enteropneusts play an important role in understanding deuterostome evolution. These chapters provide up to date reviews of these exiting groups with reference to the important literature and therefore serves as an important source of information.
