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Behavioral Ecology Of Townsends Ground Squirrels Spermophilus Townsendii In A Heterogeneous Environment
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Book Synopsis Behavioral Ecology of Townsend's Ground Squirrels (Spermophilus Townsendii) in a Heterogeneous Environment by : Peter B. Sharpe
Download or read book Behavioral Ecology of Townsend's Ground Squirrels (Spermophilus Townsendii) in a Heterogeneous Environment written by Peter B. Sharpe and published by . This book was released on 1998 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Ecology of Townsend's Ground Squirrel (Spermophilus Townsendii Mollis) by : Eric Allan Rickart
Download or read book The Ecology of Townsend's Ground Squirrel (Spermophilus Townsendii Mollis) written by Eric Allan Rickart and published by . This book was released on 1982 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Behavioral Ecology of the Thirteen-lined Ground Squirrel (Spermophilus Tridecemlineatus) by : Donna Lynn Silverman
Download or read book The Behavioral Ecology of the Thirteen-lined Ground Squirrel (Spermophilus Tridecemlineatus) written by Donna Lynn Silverman and published by . This book was released on 1981 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Behavioral Ecology of the Antipredator Vigilance of Thirteen-lined Ground Squirrels (Sciuridae: Spermophilus Tridecemlineatus) by : Cody L. Arenz
Download or read book Behavioral Ecology of the Antipredator Vigilance of Thirteen-lined Ground Squirrels (Sciuridae: Spermophilus Tridecemlineatus) written by Cody L. Arenz and published by . This book was released on 1998 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Physiological and Behavioral Ecology of Energy Acquisition in Belding's Ground Squirrels by : Gwendolyn Chiyo Bachman
Download or read book Physiological and Behavioral Ecology of Energy Acquisition in Belding's Ground Squirrels written by Gwendolyn Chiyo Bachman and published by . This book was released on 1992 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2000 with total page 992 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Biology of Ground-dwelling Squirrels by : Jan O. Murie
Download or read book The Biology of Ground-dwelling Squirrels written by Jan O. Murie and published by . This book was released on 1984 with total page 459 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effects of Wind Turbines on California Ground Squirrel (Spermophilus Beecheyi) Behavior by : Lawrence Aaron Rabin
Download or read book The Effects of Wind Turbines on California Ground Squirrel (Spermophilus Beecheyi) Behavior written by Lawrence Aaron Rabin and published by . This book was released on 2005 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Visibility and Vigilance by : Mitchel J. Hannon
Download or read book Visibility and Vigilance written by Mitchel J. Hannon and published by . This book was released on 2006 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Behavioral Ecology of Vigilance in Columbian Ground Squirrels, S̲p̲e̲r̲m̲o̲p̲h̲i̲l̲u̲s̲ C̲o̲l̲u̲m̲b̲i̲a̲n̲u̲s̲ by : Mary Mae Hardt
Download or read book Behavioral Ecology of Vigilance in Columbian Ground Squirrels, S̲p̲e̲r̲m̲o̲p̲h̲i̲l̲u̲s̲ C̲o̲l̲u̲m̲b̲i̲a̲n̲u̲s̲ written by Mary Mae Hardt and published by . This book was released on 1985 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The behavior of the Columbian ground squirrels located in the periphery and core of a colony were compared using 10 minute focal animal observations. Peripheral and core squirrels combined spent the major portion of their time in feedings (53%) and vigilance (34%). Squirrels located in the periphery of the colony spent significantly more time vigilant and displayed a significantly higher frequency of vigilance postures than did squirrels in the core of the colony. The horizontal head up alert posture was used more than other alert postures by both groups, but the peripheral squirrels used the head up a significantly larger portion of time and with greater frequency than core squirrels. Core squirrels spent significantly more time feeding and displayed a significantly lower frequency of feeding than did peripheral squirrels"--Document.
Book Synopsis Ecology of Townsend Ground Squirrels in the Birds of Prey Study Area by : Donald R. Johnson
Download or read book Ecology of Townsend Ground Squirrels in the Birds of Prey Study Area written by Donald R. Johnson and published by . This book was released on 1978 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Foraging and Behavioral Ecology of Thirteen-lined Ground Squirrels by : Eve Elaine Ogden
Download or read book The Foraging and Behavioral Ecology of Thirteen-lined Ground Squirrels written by Eve Elaine Ogden and published by . This book was released on 1994 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Socioecology, Mating System and Behavior of Round-Tailed Ground Squirrels (Xerospermophilus Tereticaudus). by : Karen Elizabeth Munroe
Download or read book The Socioecology, Mating System and Behavior of Round-Tailed Ground Squirrels (Xerospermophilus Tereticaudus). written by Karen Elizabeth Munroe and published by . This book was released on 2011 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: Social organization of a species may impact behavior, reproductive ecology, mating system, population genetic structure and overall fitness. A spectrum of sociality exists from solitary individuals to aggregations to integrated, highly related groups. A large body of knowledge exists for sociality and life-history characteristics of ground-dwelling sciurids, including several overarching models to explain the evolution of sociality. These models predict round-tailed ground squirrels(Xerospermophilus tereticaudus)to be solitary based on small body size (1̃25g), relatively long period of activity (January-June) and a short period of adult-juvenile overlap. However, previous behavioral observations suggest round-tailed ground squirrels have a clustered matrilineal structure with a suite of social behaviors, suggesting that they may represent a unique outlier in ground squirrel sociality models. Within the population of round-tailed ground squirrels at the Casa Grande Ruins National Monument in Coolidge, Arizona, USA, rates of amicable and agonistic interactions between adults were low, with no relationship between relatedness of individuals and rates of social interactions. No population substructure was evident with Bayesian analyses, global or pairwise FST values, and average relatedness among females did not differ from males. Contrary to previous behavioral studies, round-tailed ground squirrels did not have high levels of social behavior, nor did they form significant genetic subpopulation structuring. The active season of round-tailed ground squirrels closely followed patterns of precipitation and peak resource availability. Body mass differed between males and females, across years, and within seasons. Males were heavier than females at emergence, prior to mating and pre-hibernation, but not when females began gestation. Emergence of litters and litter size are related to amount and timing of winter rainfall. Foraging and vigilance behaviors compose 64-66% of the activity budget, but differ in that males spend a greater proportion of time foraging, whereas females spend a greater proportion of time vigilant. Round-tailed ground-squirrels have a polygynandrous mating system. Polygyny was evident in 2004, 2005, and 2006, and multiple paternity occurred in the majority of litters with 2.5 sires/litter; litter size was positively correlated with the number of sires. These findings support predictions generated by sociality models for ground-dwelling squirrels.
Download or read book Ecology Abstracts written by and published by . This book was released on 1999 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coverage: 1982- current; updated: monthly. This database covers current ecology research across a wide range of disciplines, reflecting recent advances in light of growing evidence regarding global environmental change and destruction. Major ares of subject coverage include: Algae/lichens, Animals, Annelids, Aquatic ecosystems, Arachnids, Arid zones, Birds, Brackish water, Bryophytes/pteridophytes, Coastal ecosystems, Conifers, Conservation, Control, Crustaceans, Ecosyst em studies, Fungi, Grasses, Grasslands, High altitude environments, Human ecology, Insects, Legumes, Mammals, Management, Microorganisms, Molluscs, Nematodes, Paleo-ecology, Plants, Pollution studies, Reptiles, River basins, Soil, TAiga/tundra, Terrestrial ecosystems, Vertebrates, Wetlands, Woodlands.
Download or read book Animal Behaviour Abstracts written by and published by . This book was released on 1999 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Animal Dispersal written by N.C. Stenseth and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 359 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Ecosystem Dynamics of the Boreal Forest by : Charles J. Krebs
Download or read book Ecosystem Dynamics of the Boreal Forest written by Charles J. Krebs and published by Oxford University Press on Demand. This book was released on 2001 with total page 511 pages. Available in PDF, EPUB and Kindle. Book excerpt: The boreal forest is one of the world's great ecosystems, stretching across North America and Eurasia in an unbroken band and containing about 25% of the world's closed canopy forests. The Kluane Boreal Forest Ecosystem Project was a 10-year study by nine of Canada's leading ecologists to unravel the impact of the snowshoe hare cycle on the plants and the other vertebrate species in the boreal forest. In much of the boreal forest, the snowshoe hare acts as a keystone herbivore, fluctuating in 9-10 year cycles, and dragging along secondary cycles in predators such as lynx and great-horned owls. By manipulating the ecosystem on a large scale from the bottom via fertilizer additions and from the top by predator exclosures, they have traced the plant-herbivore relationships and the predator-prey relationships in this ecosystem to try to answer the question of what drives small mammal population cycles. This study is unique in being large scale and experimental on a relatively simple ecosystem, with the overall goal of defining what determines community structure in the boreal forest. Ecosystem Dynamics of the Boreal Forest: The Kluane Project summarizes these findings, weaving new discoveries of the role of herbivores-turned-predators, compensatory plant growth, and predators-eating-predators with an ecological story rich in details and clear in its findings of a community where predation plays a key role in determining the fate of individuals and populations. The study of the Kluane boreal forest raises key questions about the scale of conservation required for boreal forest communities and the many mammals and birds that live there.
