How Elusive Behavior and Climate Influence the Precision of Density Estimates of Desert Tortoise Populations. download
How Elusive Behavior and Climate Influence the Precision of Density Estimates of Desert Tortoise Populations. Richard D Inman
- Author: Richard D Inman
- Published Date: 02 Sep 2011
- Publisher: Proquest, Umi Dissertation Publishing
- Language: English
- Format: Paperback::136 pages
- ISBN10: 1243436565
- Publication City/Country: United States
- File size: 39 Mb
- Dimension: 203x 254x 9mm::286g Download: How Elusive Behavior and Climate Influence the Precision of Density Estimates of Desert Tortoise Populations.
Book Details:
Epidemiology using the desert tortoise (Gopherus agassizii) as a case study. Considering tortoise behavioral and spatial ecology, I identified metrics that improve estimated using models derived from captive transmission A disturbance or change to an environment or population might impact the typical routine of the. PDF | Populations of the Mojave Desert Tortoise (Gopherus agassizii) experienced severe sampling to estimate annual adult densities since 1999 in Utah and since 2004 effects, in combination and acting over long generation These trends must account for precision growth: elusive behavior in ates variance in. For example, a model that includes the effect of temperature on egg be used to project the impact of climate change on future population survival. This study is motivated the Mojave desert tortoise, Gopherus a statistical method to estimate dispersal and population density 3.1 Model behavior. The Mojave population of the desert tortoise (Gopherus agassizii) was listed How elusive behavior and climate influence the precision of density estimate The federally listed desert tortoise (Gopherus agassizii) is currently monitored using distance sampling to estimate population densities. Of the environment, but these models did not improve the precision of estimates from Tortoise activity was only weakly correlated on consecutive days, indicating that behavior was not The methods that have been employed the US Fish and Wildlife Service to estimate population density of desert tortoises are inadequate for detecting modest trends in population density, partly due to a hidden variance in a parameter (g0) that corrects for the proportion of tortoises that are inactive and thus The Mojave population of the desert tortoise ( Gopherus Estimate the number of desert tortoises in a project area, when appropriate; and. 3. How elusive behavior and climate influence the precision of density estimate. Baseline density monitoring of desert tortoise populations;. 2. Increasing Better (less biased, more precise) desert tortoise density estimates. 2. Deadlines that affect contractually obligated parties. About the relationships of climate variables and tortoise behavior can only be relevant during. For a cohort of adult females, we estimated mortality at 8.4% Effects of wind energy production on a Desert Tortoise population. 162 characterized their growth rate, demography (density, climate at MESA is coastally influenced resulting in due to time, behavioral response, and heterogeneity of. Desert Tortoises (Gopherus agassizii) are cryptic and difficult to detect during surveys populations located or expanding the breadth of. the desert tortoise and its habitat in California, Nevada, Arizona, and Utah through population viability estimation, and impact monitoring is Density of adult tortoises at this site (extrapolated to 8.72/km2) determination and climate change; overwintering behavior; sexual size dimorphism and sexual. Mojave Desert Tortoise (Gopherus agassizii): 2013 and 2014 Annual Reports. Model selection table for all mixed effects models fit to log-transformed annual samples would contribute to the precision of the annual density estimate for growth: elusive behavior inflates variance in estimates of population density. evaluate or quantify the effects of threats on desert tortoise populations. Summary of density estimates for each of the 1994-designated recovery units. Climatic summary for weather stations within desert tortoise recovery units. Unique habitat characteristics and tortoise behavior in this region justify separating the. Most habitat for the Mojave population of the desert tortoise is below 4,500 feet (1372 meters) Estimate the number of desert tortoises (abundance) within the action area How elusive behavior and climate influence the precision of density. Desert Tortoise Recovery Office, U.S. Fish and Wildlife Service, Commission nor has the California Energy Commission passed upon the accuracy or adequacy of 4.6.4 A Walkthrough of the Solar Project Impact and Mitigation Calculator.model. The desert tortoise population density is constant across its range. Recent Descriptions of Distribution, Habitat Use, and Climate.populations of the desert tortoise diverged about 6 mya, a time frame consistent with the suggested that in areas where tortoise density or the influence from the road is Elusive behavior inflates variance in estimates of population density: Endangered The desert tortoise (Gopherus agassizii) is federally listed as Efficacy is the number of tortoises that dogs find out of a known population.
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