Download or read book A Morphometric Analysis of Geographic Variation Within Sorex Monticolus Insectivora written by Lois F. Alexander and published by Sagwan Press. This book was released on 2015-08-23 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
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 2017-03-11 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from A Morphometric Analysis of Geographic Variation Within Sorex Monticolus (Insectivora, Soricidae) An ocular micrometer mounted in a Bausch and Lomb binocular microscope was used to measure 17 cranial and mandibular characters (fig. A Fowler max-cal electronic caliper with digital readout to mm was used to measure cranial depth and greatest length of skull. These 19 charac ters were selected because they are conventional dimensions found useful in previous studies of soricids (carraway, 1990; Choate, 1972; Diersing, 1980; van Zyll de Jong, 1980) and because they have objective endpoints and are consistently re peatable. Values for characters measured with the ocular micrometer were retained as number of ocular lines for analysis; values subsequently were converted to millimeters and are reported as such herein. Gender in Sorex does not seem to affect cranial morphology (rudd, 1955; van Zyll de J ong, in addition, many museum speci mens of Shrews are misclassified to sex (l. Carraway, pers. Comm.) thus biasing results claim ing a difference. For these reasons sexes were combined in this analysis. 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 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 A Morphometric Analysis of Geographic Variation Within Sorex Monticolus Insectivora Soricidae written by Lois F. Alexander and published by . This book was released on 1996 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recent Mammals of Alaska written by Joseph A. Cook and published by University of Alaska Press. This book was released on 2010-03-15 with total page 401 pages. Available in PDF, EPUB and Kindle. Book excerpt: From the polar bear and the gray wolf to the walrus and river otter, there are 115 species of mammals in Alaska that have never been fully catalogued until now. Biologists Joseph A. Cook and Stephen O. MacDonald have compiled here the first comprehensive guide to all of Alaska’s mammals, big and small, endearing and ferocious. Through extensive fieldwork and research the authors have produced a unique and authoritative reference. Detailed entries for each species include distribution and taxonomic information, status, habitat, and fossil history. Appendices include quick reference listings of mammal distribution by region, specimen locations, conservation status, and the incidence of Pleistocene mammals. The guide is generously illustrated with line drawings by Alaskan artist W. D. Berry and includes several maps indicating populations and locations of species. Mammals of Alaska will be an accessible, easy to use source for scholars and hobbyists alike.
Download or read book Mammal Species of the World written by Don E. Wilson and published by JHU Press. This book was released on 2005 with total page 2201 pages. Available in PDF, EPUB and Kindle. Book excerpt: This indispensable reference work belongs in public and academic libraries throughout the world and on the shelf of every biologist who works with mammals.
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Download or read book Wildlife habitat Relationships in Oregon and Washington written by David H. Johnson and published by . This book was released on 2001 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides information about the terrestrial, freshwater, and marine habitats of Oregon and Washington and the wildlife that depend upon them; it also supports broader and more consistent conservation planning, management, and research. The 27 chapters identify 593 wildlife species, define some 300 wildlife terms, profile wildlife communities, review introduced and extirpated species and species at risk, and discuss management approaches. The volume includes color and bandw photographs, maps, diagrams, and illustrations; and the accompanying CD-ROM contains additional wildlife data (60,000 records), maps, and seven matrixes that link wildlife species with their respective habitat types. Johnson is a wildlife biologist, engineer, and habitat scientist; and O'Neill is director of the Northwest Habitat Institute; they worked together on this publication project as its managing directors. Annotation copyrighted by Book News Inc., Portland, OR
Download or read book The Cumulative Book Index written by and published by . This book was released on 1996 with total page 2230 pages. Available in PDF, EPUB and Kindle. Book excerpt: A world list of books in the English language.
Download or read book Bibliographic Index written by and published by . This book was released on 1997 with total page 1192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
