Endemic Chronic Wasting Disease Causes Mule Deer Population Decline in Wyoming PDF Download
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Author: Melia T. DeVivo
Publisher:
ISBN:
Category : Chronic wasting disease
Languages : en
Pages : 17
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Book Description
Chronic wasting disease (CWD) is a fatal transmissible spongiform encephalopathy affecting white-tailed deer (Odocoileus virginianus), mule deer (Odocoileus hemionus), Rocky Mountain elk (Cervus elaphus nelsoni), and moose (Alces alces shirasi) in North America. In southeastern Wyoming average annual CWD prevalence in mule deer exceeds 20% and appears to contribute to regional population declines. We determined the effect of CWD on mule deer demography using age-specific, female-only, CWD transition matrix models to estimate the population growth rate (?). Mule deer were captured from 2010?2014 in southern Converse County Wyoming, USA. Captured adult ( 1.5 years old) deer were tested ante-mortem for CWD using tonsil biopsies and monitored using radio telemetry. Mean annual survival rates of CWD-negative and CWD-positive deer were 0.76 and 0.32, respectively. Pregnancy and fawn recruitment were not observed to be influenced by CWD. We estimated ? = 0.79, indicating an annual population decline of 21% under current CWD prevalence levels. A model derived from the demography of only CWD-negative individuals yielded; ? = 1.00, indicating a stable population if CWD were absent. These findings support CWD as a significant contributor to mule deer population decline. Chronic wasting disease is difficult or impossible to eradicate with current tools, given significant environmental contamination, and at present our best recommendation for control of this disease is to minimize spread to new areas and naïve cervid populations.
Author: Melia T. DeVivo
Publisher:
ISBN:
Category : Chronic wasting disease
Languages : en
Pages : 17
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Book Description
Chronic wasting disease (CWD) is a fatal transmissible spongiform encephalopathy affecting white-tailed deer (Odocoileus virginianus), mule deer (Odocoileus hemionus), Rocky Mountain elk (Cervus elaphus nelsoni), and moose (Alces alces shirasi) in North America. In southeastern Wyoming average annual CWD prevalence in mule deer exceeds 20% and appears to contribute to regional population declines. We determined the effect of CWD on mule deer demography using age-specific, female-only, CWD transition matrix models to estimate the population growth rate (?). Mule deer were captured from 2010?2014 in southern Converse County Wyoming, USA. Captured adult ( 1.5 years old) deer were tested ante-mortem for CWD using tonsil biopsies and monitored using radio telemetry. Mean annual survival rates of CWD-negative and CWD-positive deer were 0.76 and 0.32, respectively. Pregnancy and fawn recruitment were not observed to be influenced by CWD. We estimated ? = 0.79, indicating an annual population decline of 21% under current CWD prevalence levels. A model derived from the demography of only CWD-negative individuals yielded; ? = 1.00, indicating a stable population if CWD were absent. These findings support CWD as a significant contributor to mule deer population decline. Chronic wasting disease is difficult or impossible to eradicate with current tools, given significant environmental contamination, and at present our best recommendation for control of this disease is to minimize spread to new areas and naïve cervid populations.
Author: David R. Edmunds
Publisher:
ISBN: 9780549795223
Category : Chronic wasting disease
Languages : en
Pages : 120
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Book Description
Author: Olof C. Wallmo
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 632
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Developed in co-operation with U.S. Department of Agriculture, Forest Service.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: James R. Heffelfinger
Publisher: CRC Press
ISBN: 1000851559
Category : Science
Languages : en
Pages : 537
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Book Description
Black-tailed and mule deer represent one of the largest distributions of mammals in North America and are symbols of the wide-open American West. Each chapter in this book was authored by the world’s leading experts on that topic. Both editors, James R. Heffelfinger and Paul R. Krausman, are widely published in the popular and scientific press and recipients of the O. C. Wallmo Award, given every two years to a leading black-tailed and mule deer expert who has made significant contributions to the conservation of this species. In addition, Heffelfinger has chaired the Mule Deer Working Group sponsored by the Western Association of Fish and Wildlife Agencies for more than 15 years. This working group consists of the leading black-tailed and mule deer experts from each of 24 states, provinces, and territories in western North America, putting them at the forefront of all conservation and much of the research on this species. The book represents all current knowledge available on these deer, including how changing conditions such as fires, habitat alteration and loss, disease, climate change, socio-economic forces, energy development, and other aspects are influencing their distribution and abundance now and into the future. It takes a completely fresh look at all chapter topics. The revisions of distribution, taxonomy, evolution, behavior, and new and exciting work being done in deer nutrition, migration and movements, diseases, predation, and human dimensions are all assembled in this volume. This book will instantly become the foundation for the latest information and management strategies to be implemented on the ground by practitioners and to inform the public. Although this book is about deer, the topics discussed influence most terrestrial wildlife worldwide, and the basic concepts in many of the chapters are applicable to other species.
Author:
Publisher:
ISBN:
Category : Mammals
Languages : en
Pages : 44
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Author: David A. Jessup
Publisher: JHU Press
ISBN: 1421446758
Category : Science
Languages : en
Pages : 656
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Book Description
Provides wildlife professionals with cutting-edge scientific information on the most damaging and newly emerging wildlife diseases. Wildlife diseases and their implications are at the forefront of many sectors of scientific endeavor, especially in the wake of the COVID-19 pandemic. Nearly 60 percent of all human diseases and 75 percent of all emerging infectious diseases are zoonotic. Edited by pioneering wildlife veterinarians David A. Jessup and Robin W. Radcliffe, Wildlife Disease and Health in Conservation explores the origins and impacts of as well as the responses to the most damaging and persistent diseases currently threatening wildlife conservation. Focusing mainly on newer, invasive, and controversial wildlife health challenges, this book also reexamines classic diseases that provide warnings and important lessons for wildlife professionals and policy makers. Each chapter offers cutting-edge scientific information and extensive references to help readers plan for, respond to, and conduct research on these serious health challenges. This book: • Reports crucial findings on newly emerging diseases and how to recognize and manage them • Explores the health of critical but often neglected aquatic ecosystems, including both vertebrate and invertebrate examples • Covers a vast diversity of wildlife health threats, from epizootic bighorn sheep pneumonia and African swine fever to sea star wasting disease, avian influenza, and rabbit hemorrhagic disease • Explains zoonotic dangers to humans, including coronaviruses • Includes information on marine and aquatic species, wild ungulate species, carnivores and omnivores, birds, and more • Provides insight into the social, legal, financial, and political factors that may override or influence conservation priorities in response to biomedical challenges Featuring detailed and attractive field notes–style illustrations by Laura Donohue and essential essays from experts in the field, Wildlife Disease and Health in Conservation combines theory and practice to inform and inspire wildlife health and conservation.
Author: United States. Congress. House. Committee on Resources. Subcommittee on Forests and Forest Health
Publisher:
ISBN:
Category : Medical
Languages : en
Pages : 132
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Author: G.A. Wobeser
Publisher: Springer Science & Business Media
ISBN: 1475756097
Category : Science
Languages : en
Pages : 257
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- A hypothesis is a proposition, set forth as an explanation for the occurrence of a phenomenon, that can be tested. - The basis for scientific investigation is the collection of information to formulate and test hypotheses. - Experimental methods measure the effect of manipulations caused by the investigator; observational methods collect information about naturally occurring events. - There are three sub-types of experimental techniques that differ in the way subjects are chosen for inclusion in the study, in the amount of control that the investigator has over variables, and in the method used to assess changes in other variables. - Descriptive observational studies dominate the early phase of most investigations and involve the description of disease-related events in the population. Associations among factors may be observed but the strength of the associations is not measured. - Analytical observation al techniques are of three basic types: prevalence surveys, case:control studies, and incidence or cohort studies. All attempt to explain the nature of relationships among various factors and to measure the strength of associations. - Prevalence surveys and case:control studies deal with disease existing at the time of the study; incidence studies are concerned with the development of disease over time. - Observational studies may be retrospective, using existing data, or prospective with collection of new information.
Author: Matthew J. Kauffman
Publisher:
ISBN:
Category : Ungulates
Languages : en
Pages :
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