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 “"spatially-explicit capture recapture"”.
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Estimating spotted hyaena (Crocuta crocuta) population density using camera trap data in a spatially-explicit capture-recapture framework
… can be individually identified, a photographic capture-recapture framework can be used to provide density estimates. Spatially-explicit capture-recapture (SECR) models have recently been developed, and are currently considered the most robust method for analysing capture-recapture data. Camera …
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Comparing density analyses and carnivore ecology in Madagascar's southeastern rainforest
… patterns of rainforest carnivores. I found the spatially-explicit-capture-recapture models were empirically superior, as they are flexible and account for spatial variation in detection probability and area estimation. I found both endemic and exotic carnivore composition varied among four …
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Spatial Behavior and Population Estimation of the Alligator Snapping Turtle (Macrochelys Temminckii)
… number of <em>M. temminckii </em>using both spatially explicit capture recapture and a novel plot sampling model using time lapse photography. The results of this study give valuable insights into the habitat preferences of <em>M. temminckii </em>which may provide guidance to managers and …
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The density of leopards in a mixed-use landscape in the Western Cape, South Africa
… has focused on protected areas. Here I use spatially explicit capture-recapture (SECR) models on camera trap data to estimate how leopard density varies across a mixed-use landscape of protected areas, farmland, and urban areas in the Overberg region of the Western Cape, South Africa. Data …
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Estimating abundance, density, and occupancy of lion, leopard and serval in the Niokolo Koba National Park in Senegal
… remote camera surveys and both traditional (CR), spatially explicit capture-recapture (SECR) techniques for servals and leopards, and non-spatial (MR) and spatial mark resight (SMR) methods for lions. Lions selected optimal sites with both high tree density and prey activity; leopards occupied …
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Monitoring and Conserving Wildlife Communities across Northern Botswana
… occupancy models (single and multi- species) and spatially explicit capture-recapture models. Estimates of species richness ranged from 8 to 27 unique species, species had a mean occurrence probability of 0.32 (95% credible interval = 0.21–0.45), and estimated densities ranged from 1.8 aardwolves …
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Modelling the range-wide density patterns of the Arthroleptella lightfooti using acoustic monitoring data
… I used density estimates obtained from acoustic Spatially Explicit Capture Recapture (aSCR) methods and data from an acoustic survey using an array of 6 microphones to construct the first Peninsula wide population-density surface for this visually cryptic but acoustically active species. The …
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Camera traps as sensor networks for space-time exploration of terrestrial mammal communities
… leopard population density were explored. Using spatially explicit capture-recapture models, this chapter showed that leopard density remained low but varied with topographic relief; it increased with ruggedness of the terrain up to an optimum, and followed a reversed trend as the terrain …
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Passive Acoustics: A Multifaceted Tool for Marine Mammal Conservation
… The animal-based methods were traditional capture-recapture, spatially explicit capture-recapture (SECR), and an approach that blends the “snapshot” method and mark-recapture distance sampling, referred to here as (SMRDS). The cue-based methods were conventional distance sampling (CDS), an …
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Assessing the Influence of Prescribed Fire on Faunal Communities in a Pyric Landscape
… of fawns within sites. Although we did not explicitly test the factors influencing our parameters between sites, we hypothesize that the variation in coyote activity rates as well as soil productivity and its subsequent effects (i.e. forage availability, concealment cover, and land cover …
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Potential for resource competition between the boodie (Bettongia lesueur) and mala (Lagorchestes hirsutus) in the fenced Matuwa reserve, central Western Australia
… the abundance of the mala population at Matuwa. Spatially explicit capture recapture (SECR) and mark-resight models estimated a population size of over 110 individuals. With refined scat collection methods, DNA-based sampling will be an effective and valuable method for monitoring mala. This is a …
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Noninvasive tracking of jaguars (Panthera onca) and co-occurring Neotropical felids in Belize, Central America by genotyping feces and remote camera trapping
… approach of estimating abundance ( ) in programs CAPTURE and MARK and dividing abundance by the effective trapping area (ETA), the recently developed spatially explicit capture-recapture (SECR) models, both the likelihood-based approach (ML-SECR) in program DENSITY and the Bayesian approach …
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Ecology of Tigers in Churia Habitat and a Non-Invasive Genetic Approach to Tiger Conservation in Terai Arc, Nepal
… using the assay of 8 multilocus genotypes and captured them 42 times. I analyzed both data types separately for estimating density and jointly in an integrated model using both traditional, and spatial, capture-recapture frameworks. Using Program MARK and the model averaged results, my …