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Author : Henry Sheldon Fitch
Publisher :
ISBN 13 :
Total Pages : 274 pages
Book Rating : 4.:/5 (76 download)
Download or read book An Ecological Study of the Collared Lizard (Crotaphytus Collaris). written by Henry Sheldon Fitch and published by . This book was released on 1956 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (141 download)
Download or read book An Ecological Study of the Collared Lizard, Crotaphytus Collaris written by and published by . This book was released on 1956 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Casey Lee Brewster
Publisher :
ISBN 13 :
Total Pages : 298 pages
Book Rating : 4.:/5 (123 download)
Download or read book Eastern Collared Lizard (crotaphytus Collaris) Population Declines in Ozark Landscapes written by Casey Lee Brewster and published by . This book was released on 2019 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Eastern Collared Lizard (Crotaphytus collaris) has experienced extensive population declines over the past half century in the Ozark Mountains. Previous research suggests that glade habitat degradation through woody vegetation encroachment is an important factor resulting in population declines. In this dissertation I used information on time-energy budgets to investigate the link between habitat degradation and shifts in life history traits likely resulting in population declines of Eastern Collared Lizards (Crotaphytus collaris) in the Ozarks. In chapter one, I addressed the influence of dense woody vegetation encroachment on age-specific growth, body size, body condition and reproduction of C. collaris in northern Arkansas. Results from chapter one suggested that populations in encroached glades (defined by dense woody vegetation encroachment) experienced reduced body growth rates, delayed age of maturity, reduced clutch sizes and a nearly 50% decline in annual population fecundity rates. In chapter two, I investigated the role of behavior (postural adjustment) on the thermal ecology estimates of surface-active lizards using thermal data of C. collaris in one of my study populations. I used the data in chapter two to determine the most suitable methodologies to investigate the thermal ecology of C. collaris in northern Arkansas. In chapter three, I investigated the thermal sensitivity of digestion in C. collaris. Results in chapter three suggested that C. collaris digestion performance is affected by temperature, primarily through effects on passage times and voluntary feeding rates. In chapter four, I used results from the previous three chapters to erect several mechanistic hypotheses aimed at identifying the link between glade encroachment and reduced reproductive rates in C. collaris. Data in chapter four suggest C. collaris in encroached glades experience reduced environmental heat loads, shorter activity-times and less time-at-temperature suitable for digestive processing. The reduction in time-at-temperature for digestive processing resulted in lower energy available for growth and reproduction (4̃1%), which led to a near 50% decline in energy devoted to reproduction (# of eggs). Results from this dissertation provide a compelling explanation to the mechanisms causing a shift in life history traits that appear to play an important role in population declines of C. collaris in the Ozarks.
Author : Vitas E. Wagner
Publisher :
ISBN 13 :
Total Pages : 94 pages
Book Rating : 4.:/5 (615 download)
Download or read book A Phylogeographic Survey of the Collared Lizard, Crotaphytus Collaris written by Vitas E. Wagner and published by . This book was released on 2005 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecological and Evolutionary Significance of Locomotor Performance in Collared Lizards (Crotaphytus Collaris) written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Marvin Dewane Mondy
Publisher :
ISBN 13 :
Total Pages : 104 pages
Book Rating : 4.:/5 (971 download)
Download or read book A Distributional Study of the Collared Lizard, Crotaphytus Collaris Collaris written by Marvin Dewane Mondy and published by . This book was released on 1970 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Nathan Mckay Smith
Publisher :
ISBN 13 :
Total Pages : 202 pages
Book Rating : 4.:/5 (816 download)
Download or read book A Taxonomic Study of the Western Collared Lizard (Crotaphytus Collaris). written by Nathan Mckay Smith and published by . This book was released on 1972 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ann Marie Jonsson
Publisher :
ISBN 13 :
Total Pages : 50 pages
Book Rating : 4.:/5 (472 download)
Download or read book Changes in the Localized Habitat of the Collard Lizard (Crotaphytus Collaris) from Southeast Utah to Southern Arizona written by Ann Marie Jonsson and published by . This book was released on 2001 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Whitney Allison Murchison-Kastner
Publisher :
ISBN 13 :
Total Pages : 104 pages
Book Rating : 4.:/5 (129 download)
Download or read book Population Connectivity of the Eastern Collared Lizard Crotaphytus Collaris in Arkansas written by Whitney Allison Murchison-Kastner and published by . This book was released on 2021 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: Habitat reduction and fragmentation can isolate populations and decrease genetic diversity, making them susceptible to local extirpation. Additionally, geographic barriers can further impede dispersal among populations thus reducing gene flow. Field studies suggest these factors may be responsible for the decline in Eastern Collared Lizard (Crotaphytus collaris) populations in Arkansas. To address the impacts of habitat loss and fragmentation on the Eastern Collared Lizard (C. collaris) in Arkansas, I used DNA fragment analysis to examine genetic diversity, population structure and connectivity among C. collaris populations. I do so herein by employing microsatellite data from 138 adults across 11 loci to evaluate genetic diversity parameters and connectivity within and among populations in Arkansas. Results revealed that populations in geographic proximity are more genetically similar than populations more distant and isolated. Migration rates were higher within rather than between sites, ranging from 0.80 to 0.90, suggesting most populations are demographically independent and could comprise 'Management Units' (MUs). However, a Mantel test for isolation by distance (IBD) across all sites indicated a non-significant correlation between genetic and geographic distances. An Analysis of Molecular Variance (AMOVA) showed the majority of genetic variance exists within/among individuals (74%) and within populations (26%), which are moderately, but not significantly differentiated (FST=0.26). Results from assignment tests (Structure) and a Discriminant Analysis of Principal Components (DAPC) analyses suggest 5 or 8 distinct gene pools. High-population admixture characterized sites in Baxter and Stone counties, comprising the majority of samples (N=75). Overall, these data indicate populations are genetically isolated and susceptible to potential expiration. To mitigate loss of populations, local management, and conservation efforts such as habitat restoration and translocations will be beneficial if they stabilize or increase population sizes, genetic diversity and promote gene flow in C. collaris in Arkansas.
Author : Nathan M. Smith
Publisher :
ISBN 13 :
Total Pages : 29 pages
Book Rating : 4.:/5 (84 download)
Download or read book A Taxonomic Study of the Western Collared Lizards, Crotaphytus Collaris and Crotaphytus Insularis written by Nathan M. Smith and published by . This book was released on 1974 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Edwin Perry Martin
Publisher : DigiCat
ISBN 13 :
Total Pages : 87 pages
Book Rating : 4.8/5 (596 download)
Download or read book A Population Study of the Prairie Vole (Microtus ochrogaster) in Northeastern Kansas written by Edwin Perry Martin and published by DigiCat. This book was released on 2022-08-01 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: DigiCat Publishing presents to you this special edition of "A Population Study of the Prairie Vole (Microtus ochrogaster) in Northeastern Kansas" by Edwin Perry Martin. DigiCat Publishing considers every written word to be a legacy of humankind. Every DigiCat book has been carefully reproduced for republishing in a new modern format. The books are available in print, as well as ebooks. DigiCat hopes you will treat this work with the acknowledgment and passion it deserves as a classic of world literature.
Author :
Publisher :
ISBN 13 :
Total Pages : 88 pages
Book Rating : 4.:/5 (2 download)
Download or read book General Technical Report PNW. written by and published by . This book was released on 1978 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 124 pages
Book Rating : 4.:/5 (3 download)
Download or read book Wildlife Review written by and published by . This book was released on 1975 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : R. A. Perry
Publisher : CUP Archive
ISBN 13 : 9780521218429
Total Pages : 920 pages
Book Rating : 4.2/5 (184 download)
Download or read book Arid Land Ecosystems: Volume 1 written by R. A. Perry and published by CUP Archive. This book was released on 1979-03-08 with total page 920 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive account of arid-land ecosystems will be of importance to university teachers and professional ecologists throughout the world.
Author : Chris Maser
Publisher :
ISBN 13 :
Total Pages : 88 pages
Book Rating : 4.3/5 (243 download)
Download or read book Geomorphic and Edaphic Habitats written by Chris Maser and published by . This book was released on 1979 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : U.S. Fish and Wildlife Service
Publisher :
ISBN 13 :
Total Pages : 826 pages
Book Rating : 4.:/5 (319 download)
Download or read book Wildlife Abstracts written by U.S. Fish and Wildlife Service and published by . This book was released on 1976 with total page 826 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ashley Ann Grimsley
Publisher :
ISBN 13 : 9781267548979
Total Pages : 282 pages
Book Rating : 4.5/5 (489 download)
Download or read book A Reexamination of the Eastern Collared Lizard (Crotaphytus Collaris Collaris) in Arkansas written by Ashley Ann Grimsley and published by . This book was released on 2012 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: A literature review of the C. c. collaris is presented in Chapter 1. Lizard characteristics, glade habitat characteristics, and information on habitat change, loss, and fragmentation of glades are described. The main goal of my thesis, presented in Chapter 2, was to determine differences across sites in environmental variables, habitat variables, tree community structure, and lizard body condition. I sought to establish differences in these factors in 17 historical C. c. collaris sites (7 with lizard presence and 8 with lizard absence) and determine if the differences were correlated with the presence or absence of C. c. collaris populations. Significant differences in some factors were found between present sites and absent sites. Environmental variables were not related to the presence or absence of C. c. collaris, indicating a habitat phenomenon rather than environmental. Lizard presence was correlated with habitat structure, as indicated in the ground and canopy cover surveys. Present sites had a positive correlation with rock and soil cover and a negative correlation with CWD, vegetation, and canopy cover; whereas absent sites had a positive correlation with CWD, vegetation, and canopy cover and a negative correlation with rock and soil cover. Present and absent sites had a significant difference in tree community structure. Absent sites had significantly larger trees and a higher frequency of trees compared to present sites. Lizard body condition was associated with the quality and openness of the glade. These data will prove useful in conservation efforts aimed at C. c. collaris recovery in Arkansas and other glade locations in the Ozarks.
