Download or read book Estimating Viability of Gopher Tortoise Populations written by Tracey Dianne Tuberville and published by . This book was released on 2009 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of Gopher Tortoise Population Estimation Techniques written by Raymond R. Carthy and published by . This book was released on 2005 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Field Test of Gopher Tortoise Gopherus Polyphemus Population Estimation Techniques written by William D. Meyer and published by . This book was released on 2008 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gopher Tortoise Gopherus Polyphemus Recovery Plan written by Wendell A. Neal and published by . This book was released on 1990 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecologist Developed Spatially Explicit Dynamic Landscape Models written by James D. Westervelt and published by Springer Science & Business Media. This book was released on 2012-04-14 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is written for ecologists interested in capturing their understandings of how natural systems work in software – to help inform their work and communicate the consequences of proposed management plans. Historically, ecologists had to rely on the skills of trained computer programmers to modeling natural systems, but now a new generation of software is allowing ecologists to directly capture their understandings of systems in software. This book is a compilation of spatially explicit simulation models developed by ecologists and planners without any formal computer programming skills. Readers will be inspired to believe that they too can create similar models of the systems with which they are familiar.
Download or read book Determining Habitat Preferences of the Juvenile Gopher Tortoise Gopherus Polyphemus Using Spatially Modeled Vegetation on a Central Florida Sandhill written by Kristan Marie Nicole Raymond and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: Public and private conservation areas are becoming increasingly important to the continued survival of the gopher tortoise, making it imperative that land managers know the specific habitat requirements of juvenile gopher tortoises because recruitment is key to species persistence. Little is currently known about environmental factors that underlie hatchling and juvenile survival and recruitment in gopher tortoise populations. Because of the short duration and distance of juvenile tortoise foraging journeys, food availability, thermoregulatory conditions, and refugia near the burrow may considerably affect juvenile growth and survival. This two-year study of a central Florida sandhill examines the spatial relationship between juvenile gopher tortoise burrows and the surrounding habitat. Gopher tortoise burrow positions, activity, and width were recorded in four complete surveys of the 4-hectare study area. Coincident with three of the burrow surveys, vegetation and structural habitat characteristics, such as forb and canopy cover, were surveyed in a uniform grid design. Vegetation cover was reclassified using habitat suitability functions (HSFs) derived from qualitative literature values and combined into habitat suitability indices (HSIs) to model the relationships between habitat variables and the likelihood of juvenile gopher tortoise presence. Chi-squared tests and spatial point pattern analysis were used to validate and identify well-forming models. In general, the best performing HSI models for the juvenile gopher tortoise were those that incorporated all three gopher tortoise life requisites in a compensatory relationship (geometric mean): thermoregulation (total high canopy, bare ground, or litter), predation (oak mid-canopy), and food (forb or wiregrass). The models could be improved by using the observed relative abundance of juvenile burrows in each vegetation cover class to modify the HSFs. These methods will help identify habitat characteristics associated with active juvenile gopher tortoise burrows that can be used by public and private land managers to improve existing tortoise habitat and to identify high-quality habitat for future preserves.
Download or read book Existing Geospatial Knowledge of Gopher Tortoise Population and Abundance written by William D. Meyer and published by . This book was released on 2007 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environment Concerns in Rights of Way Management 8th International Symposium written by John W. Goodrich-Mahoney and published by Elsevier. This book was released on 2011-08-11 with total page 873 pages. Available in PDF, EPUB and Kindle. Book excerpt: The management of rights-of-way by electric and telephone utilities, highway departments, gas pipeline companies, and railroads around the world is guided and constrained by policies and regulations to protect the environment. Companies that manage rights-of-way are required to comply with these regulations, and are seeking the most cost-effective management practices that, at the same time, demonstrate stewardship of the environment. Protection of biodiversity and sustainable development are especially important as national goals in many countries, and rights-of-way managers are seeking practical ways to include public participation in their operations. * Addresses environmental issues in rights-of-way planning and management * Provides a forum for information exchange among various agencies, industries, environmental consultants, and academic organizations * Presents peer-reviewed papers to help achieve a better understanding of current environmental issues involved in rights-of-way management
Download or read book Long term Population Ecology and Movement Patterns of Gopher Tortoises Gopherus Polyphemus in Southwest Georgia written by Alexander David Wright and published by . This book was released on 2016 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Habitat loss, fragmentation, and degradation have led to an estimated 80% range-wide decline of gopher tortoise (Gopherus polyphemus) populations across the Southeastern Coastal Plain. Recently, the gopher tortoise was identified as a candidate for listing under the Endangered Species Act in the eastern part of its range. To support an adaptive landscape planning and decision framework for gopher tortoise conservation, I examined the population dynamics and movement patterns of four gopher tortoise populations on a large private reserve in southwestern Georgia, where tortoises were previously marked/recaptured from 1995-2000. It is critical to understand how tortoise populations vary in space and time at large spatial and temporal scales to protect a long-lived species, such as the gopher tortoise, into perpetuity. With further understanding of the long-term population ecology and movement patterns, we can better evaluate the roles of emigration and survival within populations to inform reserve design and decision analysis for the species' conservation.
Download or read book Estimating Density of Gopher Tortoises on Egmont Key written by Jennifer Dawn Cox and published by . This book was released on 1996 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Southampton at Naples written by Kevin L. Erwin Consulting Ecologist, Inc and published by . This book was released on 1992 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Enhancing Line transect Distance Sampling to Increase Detectability of Gopher Tortoises gopherus Polyphemus in Population Surveys written by Heather Elizabeth Gaya and published by . This book was released on 2019 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gopher tortoise (Gopherus polyphemus) populations are declining range-wide and accurate abundance and demographic estimates are needed for proper management of the species. I developed a series of Bayesian hierarchical models to estimate the density and size demography of gopher tortoise populations while accounting for size bias against smaller individuals. In conjunction with the estimation models, I designed a survey to incorporate randomly located double-sampling blocks and systematic vegetation measurements into the standard distance sampling methodology to better account for sources of variability known to affect detection of all tortoises. My results suggest that my hierarchical models and double-sampling survey method may increase the accuracy and precision of both density point estimates and the underlying burrow size distribution estimates of gopher tortoise populations.
Download or read book Biology and Conservation of North American Tortoises written by David C. Rostal and published by JHU Press. This book was released on 2014-08-01 with total page 203 pages. Available in PDF, EPUB and Kindle. Book excerpt: The most comprehensive book ever published on North America's native tortoises. Tortoises, those unmistakable turtles, evolved from a lineage that split off from the familiar pond turtles roughly 100 million years ago. Over time, these plant-eating land turtles spread around the world, growing to an enormous size (depending on the species) and living so long that they have become the stuff of legends. By most accounts, they are indeed the longest-lived of the turtles, with good records suggesting individuals may live as long as 180 years (anecdotal records suggest that some reach ages of 200 years or more). Providing the first comprehensive treatment of North America’s tortoises, Biology and Conservation of North American Tortoises brings together leading experts to give an overview of tortoise morphology, taxonomy, systematics, paleontology, physiology, ecology, behavior, reproduction, diet, growth, health, and conservation. The contributors carefully combine their own expertise and observations with results from studies conducted by hundreds of other researchers. The result is a book that belongs in the library of every herpetologist. Contributors Gustavo Aguirre L. Linda J. Allison Matthew J. Aresco Roy C. Averill-Murray Joan E. Berish Kristin H. Berry Dennis M. Bramble K. Kristina Drake Taylor Edwards Todd C. Esque Richard Franz Craig Guyer J. Scott Harrison Sharon M. Hermann J. Howard Hutchison Elliott R. Jacobson Valerie M. Johnson Richard T. Kazmaier Earl D. McCoy Philip A. Medica Robert W. Murphy Henry R. Mushinsky Kenneth E. Nussear Michael P. O’Connor Thomas A. Radzio David C. Rostal Lora L. Smith James R. Spotila Craig B. Stanford C. Richard Tracy Tracey D. Tuberville Michael Tuma Thane Wibbels
Download or read book The Effects of Gopher Tortoise Gopherus Polyphemus Translocation on Movements Reproductive Activity and Body Condition of Resident and Translocated Individuals in Central Florida written by Susannah Christina Riedl and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: Human-caused destruction of xeric habitats in Florida that support gopher tortoises (Gopherus polyphemus Daudin) is occurring at a rapid rate. One conservation strategy that has been used for numerous taxa is translocation. The effects of translocation on the health, reproductive activity, and movements of translocated and resident telemetered individuals was evaluated for a population of gopher tortoises in central-Florida from 2001 to 2004. Only one of the 13 individuals released left the site during the study. The home range estimates of resident individuals were not significantly different before and after the release of the translocated individuals on the site, and all mean home ranges fit within the range of estimates reported in the literature for natural populations of gopher tortoises. Habitat use of several individual resident gopher tortoises was significantly different after the translocation events. The degree that the home ranges of the residents were overlapped by other individuals in the study was not significantly different. The spatial locations of the home ranges of resident and translocated individuals were significantly different. There was evidence of reproduction for both resident and translocated females a year after the release of the translocates. The body condition of the resident individuals was higher at the end of the study relative to the start, although this may be explained by other factors. This study illustrates some of the problems associated with studies designed to assess translocation success, namely the lack adequate baseline data for the population and the challenge of balancing the sample sizes necessary for acceptable statistical power with the mechanics of translocation. The results of this study suggest that translocation is a potentially useful conservation strategy, although there are other potential consequences of translocation that need to be considered prior to its implementation.
Download or read book The Gopher Tortoise written by Ray E. Ashton and published by Rowman & Littlefield. This book was released on 2014-08-28 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: Full-color book for children ages 10 and up. Details the life of the gopher tortoise and how it is tied in with other animals. Also discusses how the encroachment into the gopher tortoise's habitat is affecting the environment and the tortoise.
Download or read book Estimating Presence and Abundance of Closed Populations written by George A. F. Seber and published by Springer Nature. This book was released on 2024-01-02 with total page 734 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive book covers a wide variety of methods for estimating the sizes and related parameters of closed populations. With the effect of climate change, and human territory invasion, we have seen huge species losses and a major biodiversity decline. Populations include plants, trees, various land and sea animals, and some human populations. With such a diversity of populations, an extensive variety of different methods are described with the collection of different types of data. For example, we have count data from plot sampling, which can also allow for incomplete detection. There is a large chapter on occupancy methods where a major interest is determining whether a particular species is present or not. Citizen and opportunistic survey data can also be incorporated. A related topic is species methods, where species richness and species' interactions are of interest. A variety of distance methods are discussed. One can use distances from points and lines, as well as nearest neighbor distances. The applications are extensive, and include marine, acoustic, and aerial surveys, using multiple observers or detection devices. Line intercept measurements have a role to play such as, for example, estimating parameters relating to plant coverage. An increasingly important class of removal methods considers successive “removals" from a population, with physical removal or "removal" by capture-recapture of marked individuals. With the change-in-ratio method, removals are taken from two or more classes, e.g., males and females. Effort data used for removals can also be used. A very important method for estimating abundance is the use of capture-recapture data collected discretely or continuously and can be analysed using both frequency and Bayesian methods. Computational aspects of fitting Bayesian models are described. A related topic of growing interest is the use of spatial and camera methods. With the plethora of models there has been a corresponding development of various computational methods and packages, which are often mentioned throughout. Covariate data is being used more frequently, which can reduce the number of unknown parameters by using logistic and loglinear models. An important computational aspect is that of model selection methods. The book provides a useful list of over 1400 references.
Download or read book Chelonian Conservation and Biology written by and published by . This book was released on 2006 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt:
