Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 104 for “"population estimates"”.
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Evaluating population estimates of mountain goats based on citizen science
… to monitor mountain goat (Oreamnos americanus) populations. I compared estimates of mountain goat abundance by volunteers at 32 sites throughout GNP to estimates by biologists and raw counts from aerial surveys at a subset of 25 and 11 sites, respectively. I used multiple observer surveys to …
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Evaluating population estimates of mountain goats based on citizen science
… to monitor mountain goat (Oreamnos americanus) populations. I compared estimates of mountain goat abundance by volunteers at 32 sites throughout GNP to estimates by biologists and raw counts from aerial surveys at a subset of 25 and 11 sites, respectively. I used multiple observer surveys to …
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An assessment of the feasibility of using administrative data in producing mid-year population estimates for South Africa
The production of mid-year population estimates is an important undertaking which informs various stakeholders in policy formation and decision making. For instance, national governments use mid-year estimates to allocate seats in parliament to various constituents and public health sectors use …
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Standardization of Street Sampling Units to Improve Street Tree Population Estimates Derived by i-Tree Streets Inventory Software
Street trees are a subpopulation of the urban forest resource and exist in the rights-of-way adjacent to public roads in a municipality. Benefit-cost analyses have shown that the annual benefits provided by the average street tree far outweigh the costs of planting and maintenance. City and …
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Population Estimates, Demography, and Habitat Assessment of the Pearl River map turtle (Graptemys pearlensis) in the Pearl River Drainage of Mississippi
… novelty as a species, no rigorous site-specific population estimates of <em>G. pearlensis</em> in Mississippi have been conducted. The primary goal of this study was to implement a replicable method of assessing the population of <em>G. pearlensis</em> throughout the Pearl River drainage system …
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Model Validation and Improvement Using New Data on Habitat Characteristics Important to Forest Salamanders, and Short-Term Effects of Forestry Practices on Salamander Movement and Population Estimates
… are compatible with maintaining healthy populations of forest amphibians. I tested previously created habitat models that determined the most important habitat characteristics for salamanders. I counted salamanders in 240 10 x 10 m plots located in the MeadWestvaco Wildlife and Ecosystem …
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Fish and Amphibian Occurrence in Waterfowl Production Area Wetlands in Minnesota During 1992
… inconstans) preferred emergent vegetation. Fish populations were determined for 11 wetlands using the Kushlan throw trap. Six of 11 wetlands contained fathead minnows with population estimates ranging from 10,000 to 1,260,000/ha. Three of 11 wetlands contained brook sticklebacks with population …
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Evaluating the Effectiveness of Population Reconstruction for Black Bear (Ursus americanus) and White-Tailed Deer (Odocoileus virginianus) Population Management
This study was a comprehensive evaluation of population reconstruction techniques. Population reconstruction techniques are population estimation methods that calculate a minimum population size based on age-specific harvest data (Downing 1980, Roseberry and Woolf 1991). Population reconstruction …
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Spiders associated with apple trees in Virginia with notes on their importance in controlling orchard insect pests
The species complex and population dynamics of spiders were studied in an abandoned and several commercial apple orchards in Virginia. There were 68 and 45 species found in the abandoned and combined commercial orchards respectively. Species numbers in individual commercial orchards ranged from …
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Household Food Insecurity Among Older People in Canada: the Exploration of a Public Health Issue Rendered Invisible
… of food insecurity among older people to the population estimates of food insecurity in Canada; and iii) examine more closely key predictors of food insecurity among older people in Canada. I undertook a scoping study, and characterized this collection of literature by methodological, …
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GENETIC POPULATION STRUCTURE AND CONSERVATION OF BULL TROUT IN THE EAST FORK BITTERROOT RIVER DRAINAGE, MONTANA
… genetic and life history diversity of bull trout populations across their range is critical as conservation, management, and recovery plans are developed. Numerous studies in different regions have shown that local bull trout populations in close geographic proximity are typically very genetically …
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GENETIC POPULATION STRUCTURE AND CONSERVATION OF BULL TROUT IN THE EAST FORK BITTERROOT RIVER DRAINAGE, MONTANA
… genetic and life history diversity of bull trout populations across their range is critical as conservation, management, and recovery plans are developed. Numerous studies in different regions have shown that local bull trout populations in close geographic proximity are typically very genetically …
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The Relative Contribution of Hudson River Tributaries to River Herring Spawning Dynamics
… as a mechanism for inferring wide spread population phenomena from more localized estimates (Tam et al., 2002). Custom designed egg mats were deployed in Black Creek (Esopus, New York) and the Fall Kill (Poughkeepsie, New York) to obtain spawning river herring egg counts for abundance …
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Estimating population parameters of early villages in the Pre-Pottery Neolithic central and southern Levant
An understanding of population dynamics is essential for reconstructing the trajectories of central and southern Levantine Pre-Pottery Neolithic (PPN) villages during the Neolithic Demographic Transition (NDT). Whilst pre-existing population estimates of PPN villages have made a valuable …
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Environmental Factors Influencing Spring Migration Chronology of Lesser Scaup (Aythya affinis)
… improve survey techniques and breeding population estimates for lesser scaup.
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Bias in Closed Population Capture-Recapture
… was the effect of departures from assumptions on population estimates obtained using three maximum likelihood population size estimators: M0 (all individuals have the same capture probability on all occasions), Mb (behavior is affected by prior capture) and Mt (all individuals have the same …
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An evaluation of systematic error in the estimation of fish population size
… a pumpkinseed sunfish (<i>Lepomis gibbosus</i>) population in a 1.16 hectare Virginia farm pond. After estimates were obtained, the pond was drained in order to compare estimated population size with actual population size. In all cases, population estimates were significantly less than actual …
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Evaluation of Bobcat (Lynx rufus) Survival, Harvest, and Population Size in the West-Central Region of South Dakota
<p>Recent concern regarding bobcat (Lynx rufus) population status has prompted researchers and managers to gather additional information about bobcats in South Dakota. From 2012–2015, we assessed population dynamics of bobcats occupying the west-central region of South Dakota. Our objectives were …
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The Palenque mapping project: settlement and urbanism at an ancient Maya city
… pattern. Aspects including settlement density, population estimates and land use strategies are the primary topics of discussion. The degree of urbanism achieved at Palenque is also evaluated. Through comparison to other well-documented ancient Mesoamerican cities, Palenque is shown to have had …
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Urban Land Use Efficiency in the United States: Assessing UN 2030 Sustainable Development Goals
… the ratio of Land Consumption Rate (LCR) to Population Growth Rate (PGR). Leveraging NLCD Impervious Surface data and WorldPop population estimates, the study calculates the LCRPGR indicator for 2,229 urban areas and examines regional and temporal trends. Results indicate that urban land area …
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