Productivity and Energy Relationships of a Free-living Population of Uinta Ground Squirrels PDF Download

Author: Jonathan P. Secter
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Author: United States. Bureau of Sport Fisheries and Wildlife
Publisher:
ISBN:
Category :
Languages : en
Pages : 186

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Author: Robert L. Ruff
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 250

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Author: Spencer R. Amend
Publisher:
ISBN:
Category : Ground squirrels
Languages : en
Pages : 0

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Author: Steve F. Johnson
Publisher:
ISBN:
Category : Ground squirrels
Languages : en
Pages : 86

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Author: David F. Balph
Publisher:
ISBN:
Category :
Languages : en
Pages :

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This study describes behavior of the Uinta round squirrel (Citellus armatus) in a free-living population. Its objective is to provide basic behavioral information on a small mammal which can fill in part of the gaps in our knowledge of behavior and social organization of the vertebrates. This would contribute to the long-term goal of viewing the progressive evolutionary changes in behavior from lower forms to man. Tinbergen has done much experimental work with animals, but he cautions biologists not to begin experimental work until they have a knowledge of the animals' general behavior. In his book Social Behaviour in Animals (1953), he states that initial behavioral research should be broad, descriptive, and observational in nature. This is necessary before attempting investigation of specific behavioral problems in order to place each behavior pattern in its proper perspective. Accordingly, this study attempts to describe the spectrum of ground squirrel activity aboveground. Further, within the limited scope of a broad descriptive study, it attempts to ascribe possible causation, function, and origin to some of these activities. The beginner sees a welter of activities and postures in the ground squirrel. However, with time one learns that there are general patterns of behavior in the apparent chaos. A given situation, such as feeding or fighting, is sufficiently stereotyped to enable one to generalize about the activities and postures that occur. This paper presents just such generalizations. All descriptions are of adult ground squirrels in the study area unless otherwise indicated.

Author: David J. Hafner
Publisher: IUCN
ISBN: 9782831704630
Category : Nature
Languages : en
Pages : 188

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The first comprehensive treatment of North American rodents of conservation concern. This action plan summarizes the rodent fauna of North America and provides available information on every rodent taxon that has been considered to be of conservation concern by state, provincial and private conservation agencies and regional experts. It is hoped that the survey provided in this action plan will serve as a common ground for all these parties in drawing up conservation strategies for rodents.

Author: Richard P. Shefferson
Publisher: Cambridge University Press
ISBN: 1108138608
Category : Science
Languages : en
Pages : 445

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The existing theories on the evolution of senescence assume that senescence is inevitable in all organisms. However, recent studies have shown that this is not necessarily true. A better understanding of senescence and its underlying mechanisms could have far-reaching consequences for conservation and eco-evolutionary research. This book is the first to offer interdisciplinary perspectives on the evolution of senescence in many species, setting the stage for further developments. It brings together new insights from a wide range of scientific fields and cutting-edge research done on a multitude of different animals (including humans), plants and microbes, giving the reader a complete overview of recent developments and of the controversies currently surrounding the topic. Written by specialists from a variety of disciplines, this book is a valuable source of information for students and researchers interested in ageing and life history traits and populations.

Author: N.C. Stenseth
Publisher: Springer Science & Business Media
ISBN: 9401123381
Category : Science
Languages : en
Pages : 359

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4.1.1 Demographic significance Confined populations grow more rapidly than populations from which dispersal is permitted (Lidicker, 1975; Krebs, 1979; Tamarin et at., 1984), and demography in island populations where dispersal is restricted differs greatly from nearby mainland populations (Lidicker, 1973; Tamarin, 1977, 1978; Gliwicz, 1980), clearly demonstrating the demographic signi ficance of dispersal. The prevalence of dispersal in rapidly expanding populations is held to be the best evidence for presaturation dispersal. Because dispersal reduces the growth rate of source populations, it is generally believed that emigration is not balanced by immigration, and that mortality of emigrants occurs as a result of movement into a 'sink' of unfavourable habitat. If such dispersal is age- or sex-biased, the demo graphy of the population is markedly affected, as a consequence of differ ences in mortality in the dispersive sex or age class. Habitat heterogeneity consequently underlies this interpretation of dispersal and its demographic consequences, although the spatial variability of environments is rarely assessed in dispersal studies.

Author: University Microfilms International
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 100

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