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Tesis sobre el tema "Drones and Camera Trap"

Autor: Grafiati

Publicado: 7 de junio de 2025

Última modificación: 2 de agosto de 2025

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1

Sudholz, Ashlee. "Machine learning for the automated detection of deer in drone and camera trap imagery." Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/212981/1/Ashlee_Sudholz_Thesis.pdf.

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To effectively manage the growing population of invasive deer in Australia, adequate monitoring techniques are essential. Traditional methods of detecting and monitoring deer such as scat surveys, spotlighting, or piloted aerial surveys can be expensive and time consuming. To overcome these issues, camera traps and remotely piloted aircraft systems (RPAS or drones) are increasingly being used to detect and monitor deer populations. This thesis presents a new method for assessing the imagery provided by RPAS and camera traps using Machine Learning, reducing the time and cost of assessing deer p

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Jourdain, Natoya O. A. S. "New analytical methods for camera trap data." Thesis, University of Kent, 2017. https://kar.kent.ac.uk/63395/.

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Density estimation of terrestrial mammals has become increasingly important in ecology, and robust analytical tools are required to provide results that will guide wildlife management. This thesis concerns modelling encounters between unmarked animals and camera traps for density estimation. We explore Rowcliffe et al. (2008) Random Encounter Model (REM) developed for estimating density of species that cannot be identified to the individual level from camera trap data. We demonstrate how REM can be used within a maximum likelihood framework to estimate density of unmarked animals, motivated by

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Örn, Fredrik. "Computer Vision for Camera Trap Footage : Comparing classification with object detection." Thesis, Uppsala universitet, Avdelningen för visuell information och interaktion, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-447482.

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Monitoring wildlife is of great interest to ecologists and is arguably even more important in the Arctic, the region in focus for the research network INTERACT, where the effects of climate change are greater than on the rest of the planet. This master thesis studies how artificial intelligence (AI) and computer vision can be used together with camera traps to achieve an effective way to monitor populations. The study uses an image data set, containing both humans and animals. The images were taken by camera traps from ECN Cairngorms, a station in the INTERACT network. The goal of the project

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Freeman, Marianne Sarah. "Development of camera trap methodology in monitoring deer distribution and abundance." Thesis, Queen's University Belfast, 2015. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.695342.

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Camera traps have taken off one of the most popular tools in ecology. This thesis aims to develop existing camera trap methodology in order to better assess the distribution and abundance of deer in the UK. Particular focus was made on the invasion history of muntjac to help elucidate their invasion pattern. The number of founding females was estimated to be 4 or 5 individuals. The effect of covariates on the camera detection zones were considered to help improve density estimates resulting from camera trap research. Flash type and individual passing speed proved to be two important covariates

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Cusack, Jeremy. "From inventories to interactions : inferring mammal community patterns and processes from camera trap data." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:514d26a4-ef9e-4c21-b6a7-7a56588f68ed.

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The deployment of camera traps, which automatically take pictures of wild animals moving in front of them, is now routinely used to survey terrestrial mammal communities worldwide. The resulting photographic data are used to answer questions relating to the richness and structure of mammal communities, the density of their component species, and how the latter might interact. This thesis fills key methodological gaps in how these questions are addressed. My first data chapter assesses how the exact placement of camera traps on natural game trails influences the characterisation of community ri

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Jůnek, Tomáš. "Camera trap as a non-invasive tool in research on rare and elusive mammals." Doctoral thesis, Česká zemědělská univerzita v Praze, 2016. http://www.nusl.cz/ntk/nusl-259693.

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Knowledge of the richness of species that inhabit a particular area is an essential metric for both conservationists and practitioners. Relatively cost-efficient and easily standardized solution has occurred in last the decades with the massive digitalization of photography, the camera trap. Such an independent detector is bias-free in the probability of recording objects passing by and in most cases does not disturb animals. Recent discoveries of new mammal species are proof of this. Moreover, camera traps allow for insight into the otherwise hidden behaviour of even the most timid animals.

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Bjervig, Joel, and Johan Slagbrand. "Thermal Imaging Platform for Drones : Cost-effective localization of forest fires." Thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-385834.

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A device for identifying forest fires in an early stage has been developed during the course of this project. Attached to a drone, this prototype will provide a live-stream to a web server displaying a blended frame, made of a thermographic image showing thermal radiation and a regular photography with the visible light. The platform consists of a small single-boarded computer, a thermal camera sensor and a regular camera module. All powered by a power bank and fitted into a custom made 3D printed plastic case. At startup the computer automatically executes scripts written in Python, initializ

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Skowronski, Robin. "Perception visuelle pour les drones légers." Thesis, Bordeaux 1, 2011. http://www.theses.fr/2011BOR14345/document.

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Dans cette thèse, en collaboration avec l'entreprise AéroDRONES, le Laboratoire Bordelais de Recherche en Informatique et l'INRIA, nous abordons le problème de la perception de l'environnement à partir d'une caméra embarquée sur un drone léger. Nous avons conçu, développé et validé de nouvelles méthodes de traitement qui optimisent l'exploitation des données produites par des systèmes de prise de vue aéroportés bas coût. D'une part, nous présentons une méthode d'autocalibrage de la caméra et de la tourelle d'orientation, sans condition spécifique sur l'environnement observé. Ensuite nous propo

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Stefansson, Thor. "3D obstacle avoidance for drones using a realistic sensor setup." Thesis, KTH, Robotik, perception och lärande, RPL, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-233807.

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Obstacle avoidance is a well researched area, however most of the works only consider a 2D environment. Drones can move in three dimensions. It is therefore of interest to develop a system that ensures safe flight in these three dimensions. Obstacle avoidance is of highest importance for drones if they are intended to work autonomously and around humans, since drones are often fragile and have fast moving propellers that can hurt humans. This project is based on the obstacle restriction algorithm in 3D, and uses OctoMap to conveniently use the sensor data from multiple sensors simultaneously a

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Ashmore, Jordan Rivers. "Using Camera-Traps to Evaluate the Relative Abundance of Predators and Prey on the Western Slope of the Panama Canal." OpenSIUC, 2009. https://opensiuc.lib.siu.edu/theses/153.

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Little research has been conducted in the Republic of Panama concerning mammalian predator and prey populations. New Technologies such as remote camera-traps, allow researcher to efficiently monitor elusive wildlife species within dense tropical vegetation. The general goal of this study was to establish concrete evidence of the felid population in EcoParque Panama-a newly designated protected area adjacent to Panama City. The specific objective of the study was to estimate the relative abundance of predators and prey species in order to determine the feasibility of releasing more felids into

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Can, Ozgun Emre. "Camera Trapping Large Mammals In Yenice Forest Habitats: A Feasibility Study For Camera Trapping Large Mammals In Yenice Forests, Turkey." Phd thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/3/12609974/index.pdf.

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Widely applicable, quantitative field methods are needed to gather wildlife data for conservation and management initiatives in Turkey. In order to evaluate the use of camera traps in forest habitats of Turkey, we conducted a 5 phase camera trap survey by using 16 passive infrared-triggered cameras with a total sampling effort of 1200 camera trap days in Yaylacik Research Forest, a 50 km2 forest patch of Yenice Forest in Karab&uuml<br>k during January-May 2006. The camera trap survey confirmed the presence of grey wolf (Canis lupus), brown bear (Ursus arctos), wildcat (Felis silvestris), red

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Arnesson, Pontus, and Johan Forslund. "Edge Machine Learning for Wildlife Conservation : Detection of Poachers Using Camera Traps." Thesis, Linköpings universitet, Reglerteknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-177483.

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This thesis presents how deep learning can be utilized for detecting humans ina wildlife setting using image classification. Two different solutions have beenimplemented where both of them use a camera-equipped microprocessor to cap-ture the images. In one of the solutions, the deep learning model is run on themicroprocessor itself, which requires the size of the model to be as small as pos-sible. The other solution sends images from the microprocessor to a more pow-erful computer where a larger object detection model is run. Both solutions areevaluated using standard image classification metr

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De, Blocq Andrew Dirk. "Estimating spotted hyaena (Crocuta crocuta) population density using camera trap data in a spatially-explicit capture-recapture framework." Bachelor's thesis, University of Cape Town, 2014. http://hdl.handle.net/11427/13053.

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Includes bibliographical references.<br>Species-specific population data are important for the effective management and conservation of wildlife populations within protected areas. However such data are often logistically difficult and expensive to attain for species that are rare and have large ranges. Camera trap surveys provide a non-invasive, inexpensive and effective method for obtaining population level data on wildlife species. Provided that species can be individually identified, a photographic capture-recapture framework can be used to provide density estimates. Spatially-explicit cap

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Rich, Lindsey N. "Monitoring and Conserving Wildlife Communities across Northern Botswana." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/82537.

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To develop effective conservation planning and mitigate biodiversity loss, standardized metrics for monitoring and assessing biodiversity are needed. This information is particularly vital in Botswana, where knowledge of many of the diverse wildlife populations is lacking. To address this knowledge gap, my dissertation research evaluated the distributions, densities, and ecology of the wildlife community in northern Botswana, with a focus on terrestrial carnivore species given their importance both ecologically and economically. My objectives were threefold: 1) estimate the distributions of

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Thompson, Kyle, and Kyle Thompson. "Seasonal Distributions of Wildlife Inhabiting the Madrean Archipelago." Thesis, The University of Arizona, 2016. http://hdl.handle.net/10150/622856.

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Species distributions reflect the suite of resources and range of environmental conditions required by a species. Distributions of many species change seasonally, however, in response to changes in resource availability and environmental conditions, many of which are projected to shift in response to climate change. We sought to identify environmental and anthropogenic factors associated with seasonal changes in the distribution of vertebrates that inhabit the Madrean Archipelago in southern Arizona, which is important for identifying mechanisms through which climate change may affect these sp

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Castagnino, Vera Romina. "Ecological study of the ocelote (Leopardus pardalis) using the camera trap technique, in Las Piedras Region, Madre de Dios-Peru." Pontificia Universidad Católica del Perú. Centro de Investigación en Geografía Aplicada, 2017. http://repositorio.pucp.edu.pe/index/handle/123456789/119873.

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The study focuses in the ecology and conservation of the ocelot (Leopardus pardalis) in the conservation and tourism concession owned by the ARCC. The study site is 11 000 hectares and it is located in the Las Piedras Region, north of Tambopata province, Madre de Dios. Camera traps were used to monitor the ocelot population during a 7-month period (from August 2012 to February 2013), divided in 9 rounds were 73 cameras were installed. The camera traps found 8 independent ocelots, from which only 3 (A1, A3 and A6) were recaptured in more than one occasion. The study did a capture-recapture anal

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Wait, Kyle. "Contemporary land-use change structures carnivore communities in remaining tallgrass prairie." Thesis, Kansas State University, 2017. http://hdl.handle.net/2097/36232.

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Master of Science<br>Department of Horticulture and Natural Resources<br>Adam A. Ahlers<br>The Flint Hills ecoregion in Kansas, USA, represents the largest remaining tract of native tallgrass prairie in North America. Anthropogenic landscape change (e.g., urbanization, agricultural production) is affecting native biodiversity in this threatened ecosystem. Our understanding of how landscape change affects spatial distributions of carnivores (i.e., species included in the Order ‘Carnivora’) in this ecosystem is limited. I investigated the influence of landscape structure and composition on site

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Mavinga, Franck Barrel. "A camera trap assessment of factors influencing leopard (Panthera pardus) habitat use in the Nouabalé-Ndoki National Park, Republic of Congo." Master's thesis, University of Cape Town, 2018. http://hdl.handle.net/11427/29730.

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Leopards (Panthera pardus) are faced with increasing levels of anthropogenic pressure resulting in population declines across much of their historical range. While there is relatively limited knowledge of leopards occurring in African rain forests, their abundance and distribution is assumed to be impacted by a combination of several anthropogenic factors, most notably loss of prey and habitat conversion. In this study I used a long-term camera trap array that forms part of the Tropical Ecology, Assessment and Monitoring (TEAM) project - Terrestrial Vertebrate (Camera Trapping) Monitoring Prot

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Mengulluoglu, Deniz. "An Inventory Of Medium And Large Mammal Fauna In Pine Forests Of Beypazari Through Camera Trapping." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612559/index.pdf.

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Information about large mammals in Turkey usually does not go further than species lists or annual counts of particular species such as the wild goat. Camera trapping is a very useful technique to overcome this deficiency by gathering information about species presence, numbers, habitat use and behavior. Hence, a one year long camera trap study was conducted to demonstrate the diversity, activity, distribution patterns, habitat preferences and interspecific interactions of medium and large mammals in a 148 km2 large pine woodland near Ankara. Brown bear (Ursus arctos), wolf (Canis lupus), Eura

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Colyn, Robin. "Optimising camera trap density and position to determine medium and large mammal species richness and occupancy on the Cape Peninsula, South Africa." Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2433.

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Thesis (MTech (Nature Conservation))--Cape Peninsula University of Technology, 2016.<br>Largely due to anthropogenic causes, biodiversity and particularly species diversity is changing at an extraordinary rate, with declines in species abundance, community composition and extinction risk being of crucial concern. Monitoring of state variables of biodiversity such as species richness and occupancy are of significant importance in determining the severity of threats placed on species, populations and communities. As a non-invasive monitoring method camera traps are noted as being an effective, a

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Fack, Vinciane. "Modalités d’expression de la géophagie et mise en évidence de son rôle dans l’écologie alimentaire du singe laineux à queue jaune du Pérou (Lagothrix flavicauda ;Humboldt, 1812): Geophagy behaviors and their role in the feeding ecology of the Peruvian yellow-tailed woolly monkey (Lagothrix flavicauda ;Humboldt, 1812)." Doctoral thesis, Universite Libre de Bruxelles, 2020. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/306284.

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La géophagie désigne l’ingestion volontaire de terre et est répandue à travers le règne animal, l’Homme inclus. Cette large distribution souligne la longue histoire évolutive du comportement et suggère que la terre ingérée confèrerait des bénéfices adaptatifs aux consommateurs. L’Homme possède une longue histoire de la géophagie. Depuis deux dizaines d’années, la géophagie chez les primates non-humains connaît un intérêt scientifique croissant. Elle a été observée chez 27% des espèces de primates reconnues actuellement. Deux hypothèses majeures expliqueraient la géophagie chez les primates :la

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Augustine, Ben C. "Leveraging Partial Identity Information in Spatial Capture-Recapture Studies with Applications to Remote Camera and Genetic Capture-Recapture Surveys." Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/82727.

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Noninvasive methods for monitoring wildlife species have revolutionized the way population parameters, such as population density and survival and recruitment 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 number of species which are difficult to identify to the individual level–a general requirement of capture-recapture models. Capture-recapture models that

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Walker, Timothy A. "Testing camera trap density estimates from the spatial capture model and calibrated capture rate indices against kangaroo rat (Dipodomys spp.) live trapping data." Thesis, San Jose State University, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10169614.

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<p>Camera trapping studies often focus on estimating population density, which is critical for managing wild populations. Density estimators typically require unique markers such as stripe patterns to identify individuals but most animals do not have such markings. The spatial capture model (SC model; Chandler & Royle, 2013) estimates density without individual identification but lacks sufficient field testing. Here, both the SC model and calibrated capture rate indices were compared against ten sessions of live trapping data on kangaroo rats (Dipodomys spp). These camera and live trapping dat

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Taylor, Johanna. "From big spots to little spots: Influence of camera trap deployment on spatial capture-recapture estimates of servals (Leptailurus serval) in Ithala Game Reserve." Master's thesis, Faculty of Science, 2021. http://hdl.handle.net/11427/33049.

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Servals (Leptailurus serval) face a range of threats which can impact their populations, but we have little information on their conservation status across much of their range. Repeated population density estimates are the most useful parameter for assessing population trends and the impacts of anthropogenic changes (e.g. habitat loss and poaching) on serval densities. These could further be used to establish a correlation between any changes in this population and relevant highlighted anthropogenic influences that may exist with relevance to their conservation vulnerability. However, such sur

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Amber, Evan Douglas. "Evaluating AHDriFT Camera Traps and Traditional Survey Methods for Eastern Massasauga Rattlesnake (Sistrurus catenatus) Presence-Absence." The Ohio State University, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=osu1618416162925146.

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Taylor, Jace C. "Using Remote Cameras to Estimate the Abundance of Ungulates." BYU ScholarsArchive, 2017. https://scholarsarchive.byu.edu/etd/7230.

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Many wildlife populations globally are experiencing unprecedented declines, and without accurate and precise estimates of abundance, we will not be able to conserve these vulnerable species. Remote cameras have rapidly advanced as wildlife monitoring tools and may provide accurate and precise estimates of abundance that improve upon traditional methods. Using remote cameras to estimate abundance may be less expensive, less intrusive, less dangerous, and less time consuming than other methods. While it is apparent that remote cameras have a place in the future of wildlife monitoring, research,

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Hongo, Shun. "Socioecology of Mandrills (Mandrillus sphinx): Mating and Feeding Tactics in a Primate with Extremely Large Group." Kyoto University, 2016. http://hdl.handle.net/2433/217731.

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Murphy, Asia J. "The Biodiversity Mirage: the Effects of Habitat Degradation and Exotic Predators on Ground-Dwelling Forest Birds, Tenrecs and Lemurs in Northeastern Madagascar." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/52906.

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Madagascar is one of the world's top conservation priorities due to the intense anthropogenic pressures on its diverse and endemic wildlife. There have been very few studies conducted in the largest protected area complex in Madagascar, the Masoala-Makira landscape (northeastern Madagascar). My goal was to examine the response of ground-dwelling forest birds, tenrecs (Lipotyphla: Tenrecidae) and lemurs to habitat degradation and the presence of exotic predators, and monitor population trends at resurveyed sites from 2008 to 2013. Using camera trap surveys and distance sampling, we observed 26

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Farris, Zachary J. "Responses of Madagascar's Endemic Carnivores to Fragmentation, Hunting, and Exotic Carnivores Across the Masoala-Makira Landscape." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/51171.

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The carnivores of Madagascar are likely the least studied of the world's carnivores, thus little is known about threats to their persistence. I provide the first long-term assessment of Madagascar's rainforest carnivore community, including: 1) how multiple forms of habitat degradation (i.e., fragmentation, exotic carnivores, human encroachment, and hunting) affect native and exotic carnivore occupancy; 2) how native and exotic carnivore temporal activity overlap and how body size and niche explain these patterns; 3) how native and exotic carnivores spatially co-occur across the landscape and

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Freitas, Paula Akkawi de. "Interação ecológica entre mamíferos terrestres frugívoros e palmeiras neotropicais /." Rio Claro, 2019. http://hdl.handle.net/11449/182294.

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Orientador: Mauro Galetti<br>Resumo: As palmeiras são consideradas um recurso chave para os mamíferos terrestres tropicais. Entretanto, como as hiper-diversas guildas de frugívoros das florestas tropicais exploram recursos de palmeiras e coexistem, ainda é pouco compreendido. Neste trabalho, avaliamos como três espécies de mamíferos frugívoros terrestres, o queixada (Tayassu pecari), seu parente próximo, o cateto (Pecari tajacu) e a cutia (Dasyprocta azarae) interagem entre si e com os frutos de três espécies de palmeiras em uma floresta tropical da Mata Atlântica do Brasil. Utilizamos armadil

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Eilert, Annette, and Katrin Magnusson. "Viltinventering med hjälp av drönare utrustad med termisk- och RGB kamera. : Identifiering och artbestämning av älg och annat klövvilt." Thesis, Linnéuniversitetet, Institutionen för skog och träteknik (SOT), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-96667.

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Betesskador på skog kostar både skogsägare och industri stora summor pengar. Ett sätt att minska betesskador kan vara bättre kontroll över populationsstorleken av klövvilt. I Sverige används flera olika etablerade viltinventeringsmetoder. Svagheten är att de baseras på trender, index och avskjutningar mer än att få fram en siffra på antalet djur. En tillförlitlig inventeringsmetod är av stor vikt som beslutsunderlag till förvaltningsplaner. Drönare är ett obemannat luftfartyg som kan utrustas med olika kameror och sensorer. Tidigare fältstudier har visat att värme från vilt kan plockas upp av

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Bastazini, Vinícius Augusto Galvão. "Efeitos da estrutura de habitat e do espaço sobre a diversidade de mamíferos no norte do Pantanal : uma abordagem de resolução fina." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2011. http://hdl.handle.net/10183/33225.

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Compreender os mecanismos que causam variações espaço-temporais na diversidade biológica é uma das principais atribuições da ecologia. A teoria clássica de nicho prediz que o gradiente ambiental e sua complexidade mediam processos cruciais na estruturação das assembléias locais, permitindo a coexistência das espécies. A associação entre fatores espaciais e ambientais e diversidade inventário e diversidade diferenciação de mamíferos Neotropicais, tem sido usualmente investigada por estudos de resolução grosseira. Assim, o efeito do gradiente ambiental em resolução fina, ainda é praticamente des

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Výborný, Filip. "Konfigurovatelná vestavná foto/videopast se záznamem dat a samočinnou adaptací na okolí." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2015. http://www.nusl.cz/ntk/nusl-234965.

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This diploma thesis deals with a design and construction of an embeded camera trap with a video recording and night vision support, which is able to self adapt to surroundings. The device is based on the Raspberry Pi platform and configurable by touch screen control with a user-friendly graphical interface. Also the web-application for easy remote administration was developed in Ruby On Rails framework. The camera trap was built and successfully tested under the real conditions. There are also typical application cases and requirements for camera trap construction described in this thesis.

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Costa, Roberto Fusco. "Levantamento populacional da jaguatirica (Leopardus pardalis), através do uso de armadilhas fotográficas no Parque Estadual Ilha do Cardoso, litoral sul do Estado de São Paulo." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/91/91131/tde-08022008-144613/.

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A jaguatirica (Leopardus pardalis), assim como a maioria dos felídeos neotropicais, é um animal discreto e de difícil observação na natureza. Usando a técnica de armadilhas fotográficas, os objetivos deste estudo foram identificar possíveis variações na taxa de foto-captura e na distância máxima percorrida da jaguatirica entre períodos sazonais e estimar seu tamanho populacional, através do método de captura-recaptura, na porção norte do Parque Estadual Ilha do Cardoso. A área de vida mínima da jaguatirica e o número de foto-capturas de outras espécies de felídeos também foram documentados. Ao

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Paolino, Roberta Montanheiro. "Importância das Áreas de Preservação Permanente (APP) ripárias para a mastofauna no nordeste do Estado de São Paulo." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/59/59139/tde-19102015-122518/.

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Dada a crescente ameaça à biodiversidade pela destruição e fragmentação dos habitats naturais, sobre-exploração, poluição e introdução de espécies exóticas invasoras, alguns veículos legais buscam preservá-la, como a instituição das Áreas de Preservação Permanente (APP) no Brasil. Elas têm sido alvo de grande discussão quanto à sua configuração com a aprovação da Lei Nº 12.651/2012, a qual alterou o Código Florestal Brasileiro. Assim, este trabalho visa avaliar se as APPs estão sendo capazes de manter a diversidade de mamíferos de médio e grande porte em uma região de agricultura e silvicultur

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Sunarto, Sunarto. "Ecology and restoration of Sumatran tigers in forest and plantation landscapes." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/37392.

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Tigers (Panthera tigris Linnaeus, 1758) are in danger of extinction. Their populations have declined from ~100,000 to only ~3,000 individuals in a century and their habitat has shrunk to less than 7% of the historic range. Of the five extant tiger subspecies, the Sumatran tiger (Panthera tigris sumatrae Pocock, 1929) is the most seriously threatened. Currently determined as Critically Endangered under IUCN criteria, the Sumatran tiger is likely to become extinct unless effective conservation measures are enacted. Threats to the tiger include habitat destruction, killing due to conflict with hu

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Jorge, Maria Carolina Lyra. "Avaliação de qualidade de fragmentos de cerrado e floresta semidecídua na região da bacia do rio Mogi-Guaçú com base na ocorrência de carnívoros." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/41/41134/tde-07022008-134102/.

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A perda de habitats é, atualmente, a grande ameaça à diversidade de vertebrados terrestres (Crooks, 2002). Muito pouco resta da vegetação nativa no estado de São Paulo, uma vez que é o estado mais desenvolvido do Brasil. Embora sua porção litorânea ainda possua uma grande faixa de Floresta Atlântica, o que restou da vegetação de cerrado em seu interior são pequenos fragmentos, cercados de agricultura e silvicultura. Entretanto, este mosaico de vegetação ainda abriga espécies de médios e grandes mamíferos. Este estudo foi desenvolvido numa área com fragmentos de cerradão, cerrado sensu stricto,

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du, Preez Byron Dennis. "The impact of intraguild competition with lion (Panthera leo) on leopard (Panthera pardus) behavioural ecology." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:6c17014e-2c58-40e5-866e-d1ce88fe0e89.

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Single-species research dominates the field of ecology; however there is a growing appreciation of the importance of a multi-species approach to holistic conservation. Carnivores exert a top-down control on other species, and are vital components of stable ecosystem functioning. Physiologically adapted for predation upon other animals, competition between carnivores can be particularly aggressive; frequently resulting in mortality, and even population suppression. Big cat research has historically focused on those species that are most easily observable; in particular the lion Panthera leo. Th

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Sousa, Saulo Meneses Silvestre de. "Uso de diferentes fitofisionomias por macacos-prego-do-peito-amarelo Sapajus xanthosternos Wied-Neuwied 1820 em fragmento de Mata Atlântica, Sergipe, Brasil." Universidade Federal de Sergipe, 2016. https://ri.ufs.br/handle/riufs/4489.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>Capuchin monkeys are frugivorous-insectivorous primates, although they can explore a wide range of food items. The availability of fruits is a key-aspect of the ecology of these primates, with direct influences over the quality of a given area for the species, and often represents the main determinant of the pattern of range use of groups. In a population-level analysis, however, the pattern of occupation of a fragment by capuchin monkeys is influenced by a broader set of factors, including structural parameters of the habi

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Perampalam, Meera. "Surveiller et Cadrer. Les caméras de surveillance dans le cinéma des années 1990 à nos jours." Thesis, Sorbonne Paris Cité, 2017. http://www.theses.fr/2017USPCA047.

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L’état de surveillance dans lequel est plongée la société contemporaine contraint à ériger des dispositifs spécifiques de sécurité. Les méthodes de surveillance utilisées relèvent principalement de l’observation et de l’écoute. De ce fait, le septième art, jouant sur « l’audio – visuel », se serait réapproprié certains de ces dispositifs comme celui de la caméra de surveillance.Ce travail de recherche s’inscrit dans le courant des Visual Culture Studies, etcherche à faire l’archéologie puis l’analyse d’un regard particulier, tel que le cinéma de fiction l’actualise très souvent depuis plusieur

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Metge, Julien. "Etude de la calibration et de l'intégration sur mini-drone d'un système caméra-capteurs inertiels et magnétiques et ses applications." Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0358/document.

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Cette thèse aborde le problème de la calibration d’un ensemble de capteurscomposé d’une centrale inertielle, d’un magnétomètre et d’une caméra, avecpour objectif leur intégration sur un système très compact : un mini-drone.Cette étude expose tout d’abord les contraintes imposées par l’application surle choix des capteurs et les solutions envisagées notamment pour résoudre leproblème de la synchronisation des mesures. Après avoir étudié les techniquesde calibration existantes, une méthode permettant la calibration de l’ensembledes capteurs (accéléromètre, gyromètre, magnétomètre et caméra) est

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Zhou, Shuting. "Navigation of a quad-rotor to access the interior of a building." Thesis, Compiègne, 2015. http://www.theses.fr/2015COMP2237.

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Ce travail de recherche est dédié à l’élaboration d’une stratégie de navigation autonome qui comprend la génération d’une trajectoire optimale en évitant des obstacles, la détection de l’objet d’intérêt spécifique (i.e. une fenêtre) et puis l’exécution de la manoeuvre postérieure à approcher la fenêtre et enfin accéder à l’intérieur du bâtiment. Le véhicule est navigué par un système de vision et une combinaison de capteurs inertiels et d’altitude, ce qui réalise une localisation relative du quadri-rotor par rapport à son environment. Une méthode de planification de trajectoire basée sur Model

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Chang, Po-Wei, and 張博崴. "The Study of Applying Camera Drones on the Estimation and Analyzation on Traffic." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/nudnxr.

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碩士<br>國立交通大學<br>電控工程研究所<br>106<br>From taking pictures using drones up in the sky, it is capable of detecting the traffic situation on the streets, lowering the costs on hardwares. But through the single scale object detection model, the image scale detected was very limited. The higher the drone is, less information could be extracted from the data, causing the rise of difficulty on vehicle detection. Also, while the progress extends from vehicle detection to vehicle tracking, it might cause matching failure because of the small detecting scale on the vehicle and the moving speed. Through tho

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Lança, Matilde Sa Lemos Da Cruz. "Impact of drones and Apac in Gopro business." Master's thesis, 2019. http://hdl.handle.net/10362/105620.

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This sensitivity analysis aims to measure the impact of two big trends in the sector, particularly in GoPro’s business. This analysis was done through the differentiation of 3 scenarios: a best case scenario, a base case scenario and a worst case scenario. The probability of this scenarios is unlikely since it was based under extreme hypothesis.

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Gigler, Dóra. "Predator-prey relations and density estimation based on camera trap data in Bükk National Park, Hungary." Master's thesis, 2020. http://hdl.handle.net/10451/48172.

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Tese de mestrado, Biologia da Conservação, Universidade de Lisboa, Faculdade de Ciências, 2020<br>Large carnivores are recovering in many regions of Europe, which generates many conflicts with different stakeholders. Bükk National Park in Hungary is a suitable area to study the effects of the natural return of the wolf (Canis lupus) on local wildlife. Wolf and ungulate densities, and the effect of wolf presence on its prey species, are often highlighted by local practitioners. One way to determine whether the wolf’s prey, such as red deer (Cervus elaphus), roe deer (Capreolus capreolus), wild

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Lin, Wei-Ting, and 林威廷. "A Study on The Detection and Recognition of Wild-Animals in Camera-Trap Images with Deep Learning." Thesis, 2019. http://ndltd.ncl.edu.tw/cgi-bin/gs32/gsweb.cgi/login?o=dnclcdr&s=id=%22107NCHU5394033%22.&searchmode=basic.

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碩士<br>國立中興大學<br>資訊科學與工程學系所<br>107<br>In recent years, more and more biologists and natural scientists have set up camera traps in the wild to collect wild animal images in large volume. In the way of using camera-trap to collect wildlife images, people do not need to wait for a long time in a fixed place until animals appear. However, in order to analyze these images and videos collected by camera-trap, and if this work is processed manually, it may require a lot of time and money. In addition, the speed of collecting wildlife images and videos is so fast that the biologists can’t effectively

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LeFlore, Eric G. "Assessing Wild Canid Distribution Using Camera Traps in the Pioneer Valley of Western Massachusetts." 2014. https://scholarworks.umass.edu/masters_theses_2/94.

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With the ever-increasing human population, more people reside in urban areas than ever before; this is having marked effects on the landscape and in turn, wildlife. This study uses automatically triggered wildlife cameras to assess the distribution of three carnivore species (coyotes, Canis latrans; red foxes, Vulpes vulpes; and gray foxes, Urocyon cinereoargenteus) around the Pioneer Valley of Massachusetts in relation to a gradient of human development. Cameras were placed at 141 locations within the 320-km2 study area over the course of three field seasons (3,052 trap nights). Relative abun

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"It All Comes Out in the Wash: Mammal Use of Riparian Corridors in Semi-Arid Sonora, Mexico." Master's thesis, 2020. http://hdl.handle.net/2286/R.I.62763.

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abstract: Land use change driven by human population expansion continues to influence the integrity and configuration of riparian corridors worldwide. Wildlife viability in semi-arid regions depend heavily on the connectivity of riparian corridors, since water is the primary limiting resource. The Madrean Archipelago in northern Mexico and southwestern United States (US) is a biodiversity hotspot that supports imperiled wildlife like jaguar (Panthera onca) and ocelot (Leopardus pardalis). Recent and ongoing infrastructure developments in the historically understudied US-México borderlands reg

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Bušová, Tereza. "Prostorová aktivita psíka mývalovitého (Nyctereutes procyonoides) v Zookoutku Malá Chuchle." Master's thesis, 2016. http://www.nusl.cz/ntk/nusl-354123.

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This thesis deals with monitoring of two raccoon dogs (Nyctereutes procyonoides) by camera traps at Prague minizoo Malá Chuchle in the period from February to May 2016. Activity and behaviour of both raccoon dogs is presented by charts and diagraphs for better understanding. Overview of Canidae family, its description and area, is included in this thesis. KEYWORDS racoon dog, Nyctereutes procyonoides, activity, ethogramm, camera trap

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Pagnucco, Katie. "Using under-road tunnels to protect a declining population of long-toed salamanders (Ambystoma macrodactylum) in Waterton Lakes National Park." Master's thesis, 2010. http://hdl.handle.net/10048/1244.

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I investigated the value of under-road tunnels as a conservation strategy to protect a long-toed salamander population, in south-west Alberta, whose overwintering sites and breeding habitat (Linnet Lake) are separated by a road. I conducted a mark-recapture study from 2008-2009, capturing salamanders using roadside fences and pitfall traps. Four tunnels were monitored in 2009 using traps and cameras. A 2008 estimate indicated that the population declined by 60% since 1994, however, road mortality was dramatically reduced following installation of fences and tunnels. Camera and trap data docu

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