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Showing 1 to 20 of 31 for “"occupancy model"”.
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Development of a Computer Based Airspace Sector Occupancy Model
… deals with the development of an Airspace Sector Occupancy Model (ASOM). The model determines the occupancy of Air Traffic Control Center (ARTCC) sectors for a given geometry of sectors and flight schedules, and can be used to study the impact of alternative flight schedules on the workload …
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Maximizing the Utility of Radio Spectrum: Broadband Spectrum Measurements and Occupancy Model for Use by Cognitive Radio
Radio spectrum is a vital national asset; proper management of this finite resource is essential to the operation and development of telecommunications, radio-navigation, radio astronomy, and passive remote sensing services. To maximize the utility of the radio spectrum, knowledge of its current …
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Fast and efficient approaches to large-scale occupancy models
Bayesian occupancy models are important statistical tools that are used to investigate species range dynamics, species interactions as well as undercover key biological processes that drive occupancy (and detection) in a particular region. The results from these models are used to answer pressing …
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Estimating the Hausdorff dimension
… more common. In order to use fractals to model many phenomena, the researcher requires the knowledge of the fractal, or Hausdorff-Besicovitch, dimension. However, no statistical properties of the usual estimator, the entropy estimator, are known. In addition, the entropy estimator is …
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Spatial distribution of the common loon (Gavia immer) in New Hampshire
… from 1980--2002 and understanding loon habitat occupancy. Specific objectives of this study were to: (1) investigate the colonization patterns of the Common Loon in New Hampshire, (2) identify and prioritize potential loon habitat in New Hampshire, and (3) develop and implement methods to be …
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Amphibian and Reptile Community Responses to Forest and Riparian Disturbance
… communities within SMZs using a multi-species occupancy approach within the Ouachita Mountains, Arkansas, and along the Broad River in South Carolina, USA. We used a hierarchical Bayesian community occupancy model to estimate species richness and species-specific occupancy responses to SMZ and …
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Multiscale patterns of mammal diversity and occurrence in the Karoo
… at the broadest scale wildlife diversity and occupancy was largely influenced by landscape–level abiotic processes, namely longitude and precipitation. None of the wide–ranging large predator (e.g., leopard or brown hyena) or endangered species (i.e., riverine rabbit) known to occur in the …
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An assessment of factors influencing territory size and the use of hunter surveys for monitoring wolves in Montana
… lupus). I evaluated whether a multi-season patch occupancy model (POM) could be used to accurately estimate the abundance and distribution of wolf packs in Montana from 2007 to 2009. I evaluated hunter sightings of wolves as an index of occupancy and assessed model accuracy by comparing POM …
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An assessment of factors influencing territory size and the use of hunter surveys for monitoring wolves in Montana
… lupus). I evaluated whether a multi-season patch occupancy model (POM) could be used to accurately estimate the abundance and distribution of wolf packs in Montana from 2007 to 2009. I evaluated hunter sightings of wolves as an index of occupancy and assessed model accuracy by comparing POM …
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Occupancy of Stream-Associated Amphibians within the Interstate 90 Snoqualmie Pass Corridor
… due to their cryptic nature; however, occupancy models were developed to deal with these detectability problems and provide estimates of occupancy that can also be related to site characteristics. Highway crossing risks and habitat isolation were mitigated for in recent construction of …
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Efficient Bayesian analysis of spatial occupancy models
… play an important role in ecological studies. Occupancy models have been a useful tool for ecologists to make inference about species distribution and occurrence. Bayesian methodology is a popular framework used to model the relationship between species and environmental variables. In this …
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Mesocarnivores in Protected Areas: ecological and anthropogenic determinants of habitat use in northern Kwa-Zulu Natal, South Africa
… a multi-species extension of the Royle-Nichols occupancy model, my study explored environmental, interspecific and anthropogenic drivers of mesocarnivore habitat use and species richness. I found a surprisingly low number of detections (N = 356) for all five mesocarnivore species and …
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Spatial population dynamics of recolonizing wolves in the Western Alps
… of wolf population trend, survival rates, occupancy parameters, and on the development of a spatially explicit population model. These estimates were lacking in Italy and Western Europe, and accurate and cost effective methods to assess these parameters have not been implemented.<p> I used …
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Spatial population dynamics of recolonizing wolves in the Western Alps
… of wolf population trend, survival rates, occupancy parameters, and on the development of a spatially explicit population model. These estimates were lacking in Italy and Western Europe, and accurate and cost effective methods to assess these parameters have not been implemented.<p> I used …
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Resource Selection, Home Range and Habitat Associations of the Southern Fox Squirrel (<i>Sciurus niger niger</i>) in the Piedmont and Coastal Plain of Virginia
… were to investigate the general resource needs, occupancy, and home range of southern fox squirrels as well as the impact of resource partitioning and possible competition with eastern gray squirrels in the Piedmont and Coastal Plain of Virginia. I captured, radio collared and tracked four …
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A camera trap assessment of factors influencing leopard (Panthera pardus) habitat use in the Nouabalé-Ndoki National Park, Republic of Congo
… and southern cluster) within the NNNP using occupancy modelling. While there were no significant differences in mammalian species richness between the two clusters there was a higher relative abundance of the preferred prey species of leopards in the northern cluster. A total of 106 leopard …
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Factors influencing cheetah (Acinonyx jubatus) distribution in Kafue National Park, Zambia
… 2018 and 2023, were used to assess cheetah occupancy estimates within Kafue National Park. These camera trap surveys were designed and run by the NGO Panthera Wildcat Conservation, in collaboration with Department of National Parks and Wildlife (DNPW) to estimate leopard density across the …
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Evaluating the Use of Autonomous Recording Units to Monitor Yellow Rails, Nelson's Sparrows, and Le Conte's Sparrows
… a paired t-test, and used the robust design occupancy model in program MARK to estimate detection probabilities for each species by survey method. I found, on average, that ARUs detected 0.59 (LCSP), 0.76 (NESP), and 1.01 (YERA) fewer individuals per survey than were detected using the …
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Determining the Status and Distribution of the Eastern Black Rail (Laterallus jamaicensis) in Coastal Texas
… from 2015 to 2018. Through the application of occupancy models, radio telemetry, capture-recapture studies, and a geographic information system, I provide an evaluation of factors that influence the distribution of black rails at multiple spatial scales in coastal Texas. Using occupancy data, I …
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Integrating multiple sign types to improve occupancy estimation for inconspicuous species: a case study of American pika in the Pacific Northwest
… critical for conservation and management. Occupancy models have emerged as one of the most powerful tools to investigate regional population trends and dynamics, range shifts and habitat associations. Standard occupancy models are capable of producing unbiased estimates of occupancy and its …
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