Download or read book Population Status of the Yosemite Toad Bufo Canorus written by Martin, David Lamar and published by . This book was released on 1991 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Habitat Modeling and Movements of the Yosemite Toad Anaxyrus written by Christina Teh-ping Liang and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Yosemite toad (Anaxyrus (=Bufo) canorus) is a high-elevation species endemic to the Sierra Nevada mountain range in California and is part of the world-wide amphibian declines phenomenon. The toad is thought to have disappeared from over 50% of its historic range even in seemingly undisturbed areas, and remaining populations appear to be in decline. The causes of the disappearance and decline are unknown, and this poses a particular challenge for management and conservation since there is little understanding on how to ensure the survival of remaining populations. In order to provide information that can be used to inform management and to aid in the conservation of the species, my research on the Yosemite toad consisted of three parts: (1) constructing species distribution models to identify environmental correlates; (2) identifying environmental correlates associated with different habitat patch types; and (3) determining movement patterns and habitat use in the terrestrial environment. In the first study, I used Yosemite toad survey data from over 2,200 sites in the Sierra National Forest in the southern part of the toad's range and related them to 54 environmental variables. I found that the Yosemite toad has a complex relationship with the environment and is correlated with both biophysical and management related variables. In the second study, I looked at 49 consistently occupied sites versus 27 intermittently occupied sites throughout the range of the Yosemite toad and related the two site types separately to 26 environmental variables. I found that the different site types were correlated with different environmental variables. In the third study, I radio-tracked 42 adult Yosemite toads and collected data on their movements and habitat use. I found that toads traveled up to 1.26 kilometers away from breeding sites, and the average distance moved was 275 meters. The toads were often found in burrows and extensively used the terrestrial environment. The results from my research help elucidate the environmental requirements of the Yosemite toad both in and away from breeding sites, and can be used to inform management decisions for protection of the species and its habitat.

Download or read book Decline Movement and Habitat Utilization of the Yosemite Toad Bufo Canorus written by David Lamar Martin and published by ProQuest. This book was released on 2008 with total page 393 pages. Available in PDF, EPUB and Kindle. Book excerpt: Canorus terrestrial foraging habitats, thereby having a greater impact on long term population viability, which is a classic example of well intended management practices failing to protect species due to the absence of adequate knowledge of the specialized habitat needs of amphibians. This study suggests the need for a B. canorus core habitat protection zone that extends 500m from the center of all actively used breeding pools.

Download or read book Demographic Modeling of Conservation Strategies for the Yosemite Toad Anaxyrus Canorus written by Corrina R. Kamoroff and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Yosemite toad (Anaxyrus canorus) is an anuran species endemic to the Sierra Nevada in California that, like many amphibians globally, has suffered population declines. The documented decline in A. canorus populations across their historic range highlights the need for an effective management strategy to protect the species from future extirpation. For this study, I estimated survival rates of A. canorus using a Cormack-Jolly-Seber model populated with data from a demographic study. I then used a female-only post-birth pulse stochastic Lefkovitch matrix model using vital rates I estimated and from the literature to simulate the effect of different management scenarios and to optimize a supplementation or reintroduction management plan. Without any management action, small populations of A. canorus populations have ≥50% risk of quasi-extinction over the next 13 years. The implementation of effective management strategies is critical to prevent further extinction of existing small populations. My results suggest that the effectiveness of a supplementation or a reintroduction management plan is dependent on the initial population size of the receiving population, life stage at release and number of individuals released into a wild population. I found that supplementing small toad populations with female adults is the most effective supplementation strategy to increase the stochastic growth rate and minimize the risk of quasi-extinction. This thesis suggests that modeling A. canorus population dynamics and trends of extant populations can help inform conservation strategies.

Download or read book Description of Bufo Canorus written by Charles Lewis Camp and published by . This book was released on 1916 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Yosemite National Park N P Yosemite Institute Environmental Education Campus written by and published by . This book was released on 2010 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evolutionary Past Present and Future of the Yosemite Toad Anaxyrus Canorus written by and published by . This book was released on 2018 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: X

Download or read book Federal Register written by and published by . This book was released on 2013-04 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Determining the Effects of Livestock Grazing on Yosemite Toads Anaxyrus Bufo Canorus and Their Habitat written by Amy J. Lind and published by . This book was released on 2011 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sierra National Forest N F Dinkey Creek Allotment Livestock Grazing Strategies Fresno County written by and published by . This book was released on 1997 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Final Yosemite Valley Plan written by United States. National Park Service and published by . This book was released on 2000 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Yosemite National Park N P General Management Plan GMP written by and published by . This book was released on 1980 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book National Park Service Annual Science Report written by and published by . This book was released on 1989 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Yosemite Toads Bufo Canorus and Mountain Garter Snakes Thamnophis Elegans Elegans written by Julia Jane Nelson and published by . This book was released on 2008 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Interpretation and Implications of Variability in Ecological Systems written by Robert Klinger and published by Frontiers Media SA. This book was released on 2024-07-22 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: Numerous hypotheses have been proposed to explain the dynamics in abundance of individual species, how species interact, how communities assemble, and how interactions between biotic and abiotic processes shape ecosystem stability. Many if not most of these hypotheses find some degree of support, but often only within relatively narrow spatial and temporal ranges. This is because conditions vary over time and from place to place, and so the strength and extent of processes that were the focus of a given a hypothesis become altered by other forces. Ecologists have confronted variability from two perspectives; conceptual and statistical. Conceptually, spatial and temporal variability are now recognized as being scale dependent and hierarchical. Statistically, there are many models that ecologists readily use that account for the hierarchical and scale-dependence of variability present in many datasets. But linking the two perspectives into a meaningful understanding of what variability means in real systems has been much less successful. For example, it is common to see studies where the fixed effects of a generalized linear mixed model are reported, but very often random effects are completely ignored or, at best, given scant attention. The likelihood of this being a significant problem increases greatly in what are rapidly becoming more common studies that utilize datasets spanning long temporal and/or large spatial scales, or when extreme and often unpredictable events (gray and black swans) occur.

Download or read book Palatability and Antipredator Response of Yosemite Toad bufo Canorus to Nonnative Brook Trout salvelinus Fontinalis in the Sierra Nevada Mountains of California written by Robert Lawrence Grasso and published by . This book was released on 2005 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Draft Yosemite Valley Plan Supplemental Environmental Impact Statement written by United States. National Park Service and published by . This book was released on 2000 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: