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 13 of 13 for “"imperfect detection"”.
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Characterizing Patterns Of Round Goby (Neogobius Melanostomus) Distribution Using Morphometrics, Occupancy Modeling, And Population Genetics
… data, models that assumed perfect detection (p = 1) when round goby are present can be underestimated as much as 5 to 60% as compared to models that assumed imperfect detection (p < 1) when the probability of occupancy of darters was considered. While the occupancy of streams by …
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Inferring rare bumble bee species occurrences from nontarget bumble bee assemblages
… recovery efforts for B. affinis are hindered by imperfect detection and complex habitat requirements, I explored nontarget bumble bees as potential surrogates for inferring or predicting the local presence of B. affinis, focusing on taxonomic diversity (richness, abundance, composition), …
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Influences of Historical and Contemporary Environmental Conditions on Threatened and Endemic Aquatic Organisms
… closed robust mark-capture design to account for imperfect detection at two sites on the Colorado River. There were significant decreases in estimated abundances and apparent survival at one site, but not the other. The differential effects observed in estimated abundance and apparent survival …
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Leveraging Partial Identity Information in Spatial Capture-Recapture Studies with Applications to Remote Camera and Genetic Capture-Recapture Surveys
… rates, are estimated while accounting for imperfect detection using capture-recapture models. Reliable estimates of these parameters are vital information required for making sound conservation decisions; however to date, noninvasive sampling methods have been of limited use for a vast …
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Evaluating population estimates of mountain goats based on citizen science
… I used N-mixture models, which calculated detection probability through patterns of detection and non-detection to obtain estimates of abundance. Population estimates made by citizen science overlapped estimates by biologists and estimates from previous research. Density estimates from …
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Evaluating population estimates of mountain goats based on citizen science
… I used N-mixture models, which calculated detection probability through patterns of detection and non-detection to obtain estimates of abundance. Population estimates made by citizen science overlapped estimates by biologists and estimates from previous research. Density estimates from …
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Population Size And Habitat Association Of Etheostoma Nebra, The Buck Darter, Using Abundance Modeling In The Buck Creek System, Cumberland River Drainage, Kentucky
… on measured habitat variables and to account for imperfect detection, the total population in both streams was estimated to consist of approximately 17,000 individuals. Analyses of the two occupied streams yielded higher abundance estimates of E. nebra in Big Spring Branch. Important habitat …
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Bats and trees in a managed forest
… years to characterize the drivers of roost tree detection and longevity. I used a multistate mark-recapture analysis to evaluate how characteristics of the tree, stand, and landscape impacted our ability to locate historical roost trees and the probability of a snag roost falling. I found we were …
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Development of VHH- and antibody- based imaging and diagnostic tools
… development of such therapies is the reliance on imperfect detection methods to identify site(s) of infection, or to monitor immune cell recruitment to sites of infection or inflammation in vivo. The goal of this thesis is overcome at least some of these limitations by utilizing novel tools that …
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Assessing American Marten Use of Track-Plate Box Surveys for Estimating Population Size in the Black Hills of South Dakota
… from a saturation-trapping study to derive detection probabilities when marten occurred at high (>2 marten/10.2 km2) and low (! 1 marten/10.2 km2) densities within 8, 10.2 km2 quadrats. Estimated probability of detecting marten in high density quadrats was p = 0.952 (se = 0.046), while the …
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The ecology of a recovering native predator: the European pine marten (Martes martes)
… using quantitative techniques allowing for imperfect detection. I elucidate the potential of a recovering native predator to cause declines in an invasive prey species and have positive effects on the occurrence of a competing native prey species. I hypothesise the mechanism driving this …
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Demographic processes determining the range dynamics of plant species, and their consequences for biodiversity maintenance in the face of environmental change
… and an observation submodel (describing imperfect detection of individuals). The demographic submodel links species-specific habitat models describing the suitable habitat and process-based demographic models that consider local dynamics and anemochoric seed dispersal between populations. …
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Anthropogenic environmental change and habitat occupancy by riparian muskrats in a Midwestern landscape
… approximated a home-range scale. I calculated detection probabilities to determine the likelihood of false absences. The per-survey detection probability was 0.79 (SE = 0.04) in 2007 and 0.76 (SE = 0.04) in 2008. Detection was related positively to Julian date and negatively to wood debris …