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EBookClubs

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Book Analysis of Gopher Tortoise Population Estimation Techniques

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:

Book Gopher Tortoise Gopherus Polyphemus Recovery Plan

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:

Book Enhancing Line transect Distance Sampling to Increase Detectability of Gopher Tortoises gopherus Polyphemus in Population Surveys

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.

Book A Demographic Study of an Isolated Population of the Gopher Tortoise Gopherus Polyphemus and an Assessment of a Relocation Procedure for Tortoises

Download or read book A Demographic Study of an Isolated Population of the Gopher Tortoise Gopherus Polyphemus and an Assessment of a Relocation Procedure for Tortoises written by Terry J. Doonan and published by . This book was released on 1986 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Gopher Tortoise Nest Detection at Camp Shelby Mississippi

Download or read book Gopher Tortoise Nest Detection at Camp Shelby Mississippi written by Hollis H. Bennett and published by . This book was released on 2005 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Long term Population Ecology and Movement Patterns of Gopher Tortoises Gopherus Polyphemus in Southwest Georgia

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.

Book The Gopher Tortoise

Download or read book The Gopher Tortoise written by Ray E. Ashton and published by Pineapple Press Inc. This book was released on 2004 with total page 66 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.

Book Determining Habitat Preferences of the Juvenile Gopher Tortoise Gopherus Polyphemus Using Spatially Modeled Vegetation on a Central Florida Sandhill

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.

Book Ecologist Developed Spatially Explicit Dynamic Landscape Models

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.