White-Tailed Deer Habitat
White-Tailed Deer Habitat

Author: Timothy Edward Fulbright

Publisher: Texas A&M University Press

Published: 2013-04-26

Total Pages: 330

ISBN-13: 1603449728

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The original, 2006 edition of Timothy Edward Fulbright and J. Alfonso Ortega-S.’s White-Tailed Deer Habitat: Ecology and Management on Rangelands was hailed as “a splendid reference for the classroom and those who make their living from wildlife and the land” and as “filling a niche that is not currently approached in the literature.” In this second, full-color edition, revised and expanded to include the entire western United States and northern Mexico, Fulbright and Ortega-S. provide a carefully reasoned synthesis of ecological and range management principles that incorporates rangeland vegetation management and the impact of crops, livestock, predation, and population density within the context of the arid and semiarid habitats of this broad region. As landowners look to hunting as a source of income and to the other benefits of managing for wildlife, the clear presentation of the up-to-date research gathered in this book will aid their efforts. Essential points covered in this new edition include: White-tailed deer habitat requirements Nutritional needs of White-tailed deer Carrying capacity Habitat management Hunting Focused across political borders and written with an understanding of environments where periodic drought punctuates long-term weather patterns, this revised and expanded edition of White-Tailed Deer Habitat: Ecology and Management on Rangelands will aid landowners, researchers, and naturalists in their efforts to integrate land management and use with sound ecological practices.

Animal Dispersal
Animal Dispersal

Author: N.C. Stenseth

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 359

ISBN-13: 9401123381

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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.

Mammalian Dispersal Patterns
Mammalian Dispersal Patterns

Author: B. Diane Chepko-Sade

Publisher: University of Chicago Press

Published: 1987

Total Pages: 361

ISBN-13: 0226102688

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Mammalian Dispersal Patterns examines the ways that social structure affects population genetics and, in turn, rates of evolution, in mammalian groups. It brings together fieldwork in animal behavior and wildlife biology with theoretical work in demography and population genetics. The focus here is dispersal—whether, how, and when individuals leave the areas where they are born. Theoretical work in population genetics indicates that such social factors as skewed sex ratios, restrictive mating patterns, and delayed age of first reproduction will lower the reproductive variability of a population by reducing the number of genotypes passed from one generation to the next. Field studies have shown that many mammalian species do exhibit many such social characteristics. Among horses, elephant seals, and a number of primates, the majority of females are inseminated by only a fraction of the males. In pacts of wolves and mongooses, usually only the highest-ranking male and female breed in a given season. Although socially restricted mating tends to lower genetic variability in isolated populations, it actually tends to increase genetic variability in subdivided populations with low rates of migration between subunits. Among some species there is little dispersal and thus little gene flow between subpopulations; other species travel far afield before mating. The contributors to this volume examine actual data from populations of mammals, the way patterns of dispersal correlate with the genetic structure of individuals and populations, and mathematical models of population structure. This interdisciplinary approach has an important bearing on work in conservation of both wildlife and zoo populations, for it shows that the home range and the population size needed to maintain genetic variability can differ greatly from one species to the next. The volume also offers a fruitful model for future research.