Academic literature on the topic 'Spatial capture-recapture (SCR)'

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Journal articles on the topic "Spatial capture-recapture (SCR)"

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Moqanaki, Ehsan M., Cyril Milleret, Mahdieh Tourani, Pierre Dupont, and Richard Bischof. "Consequences of ignoring variable and spatially autocorrelated detection probability in spatial capture-recapture." Landscape Ecology 36, no. 10 (2021): 2879–95. http://dx.doi.org/10.1007/s10980-021-01283-x.

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Abstract Context Spatial capture-recapture (SCR) models are increasingly popular for analyzing wildlife monitoring data. SCR can account for spatial heterogeneity in detection that arises from individual space use (detection kernel), variation in the sampling process, and the distribution of individuals (density). However, unexplained and unmodeled spatial heterogeneity in detectability may remain due to cryptic factors, both intrinsic and extrinsic to the study system. This is the case, for example, when covariates coding for variable effort and detection probability in general are incomplete
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Lindsø, Lars K., Pierre Dupont, Lars Rød-Eriksen, et al. "Estimating red fox density using non-invasive genetic sampling and spatial capture–recapture modelling." Oecologia 198, no. 1 (2021): 139–51. http://dx.doi.org/10.1007/s00442-021-05087-3.

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AbstractSpatial capture–recapture modelling (SCR) is a powerful tool for estimating density, population size, and space use of elusive animals. Here, we applied SCR modelling to non-invasive genetic sampling (NGS) data to estimate red fox (Vulpes vulpes) densities in two areas of boreal forest in central (2016–2018) and southern Norway (2017–2018). Estimated densities were overall lower in the central study area (mean = 0.04 foxes per km2 in 2016, 0.10 in 2017, and 0.06 in 2018) compared to the southern study area (0.16 in 2017 and 0.09 in 2018). We found a positive effect of forest cover on d
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Schmidt, Benedikt R., Anita Meier, Chris Sutherland, and J. Andy Royle. "Spatial capture–recapture analysis of artificial cover board survey data reveals small scale spatial variation in slow-worm Anguis fragilis density." Royal Society Open Science 4, no. 9 (2017): 170374. http://dx.doi.org/10.1098/rsos.170374.

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Vague and/or ad hoc definitions of the area sampled in monitoring efforts are common, and estimates of ecological state variables (e.g. distribution and abundance) can be sensitive to such specifications. The uncertainty in population metrics due to data deficiencies, vague definitions of space and lack of standardized protocols is a major challenge for monitoring, managing and conserving amphibian and reptile populations globally. This is especially true for the slow-worm ( Anguis fragilis ), a cryptic and fossorial legless lizard; uncertainty about spatial variation in density has hindered c
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Widodo, Febri Anggriawan, Stephanus Hanny, Eko Hery Satriyo Utomo, et al. "Tigers and Their Prey in Bukit Rimbang Bukit Baling: Abundance Baseline for Effective Wildlife Reserve Management." Jurnal Ilmu Kehutanan 11, no. 2 (2017): 118. http://dx.doi.org/10.22146/jik.28275.

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Managing the critically endangered Sumatran tiger (Panthera tigris sumatrae) needs accurate information on its abundance and availability of prey at the landscape level. Bukit Rimbang Bukit Baling Wildlife Reserve in central Sumatra represents an important area for tigers at local, regional and global levels. The area has been recognized as a long-term priority Tiger Conservation Landscape. Solid baseline information on tigers and prey is fundamentally needed for the management. The objective of this study was to produce robust estimate of tiger density and prey a vailability in the reserve. W
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Celva, Roberto, Barbara Crestanello, Federica Obber, et al. "Assessing Red Fox (Vulpes vulpes) Demographics to Monitor Wildlife Diseases: A Spotlight on Echinococcus multilocularis." Pathogens 12, no. 1 (2022): 60. http://dx.doi.org/10.3390/pathogens12010060.

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The assessment of red fox population density is considered relevant to the surveillance of zoonotic agents vectored by this species. However, density is difficult to estimate reliably, since the ecological plasticity and elusive behavior of this carnivore hinder classic methods of inference. In this study, red fox population density was estimated using a non-invasive molecular spatial capture-recapture (SCR) approach in two study areas: one in a known hotspot of the zoonotic cestode Echinococcus multilocularis, and another naïve to the parasite. Parasitological investigations on collected samp
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Johnson, James T., Richard B. Chandler, L. Mike Conner, et al. "Effects of Bait on Male White-Tailed Deer Resource Selection." Animals 11, no. 8 (2021): 2334. http://dx.doi.org/10.3390/ani11082334.

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Bait is often used to increase wildlife harvest susceptibility, enhance viewing opportunities, and survey wildlife populations. The effects of baiting depend on how bait influences space use and resource selection at multiple spatial scales. Although telemetry studies allow for inferences about resource selection within home ranges (third-order selection), they provide limited information about spatial variation in density, which is the result of second-order selection. Recent advances in spatial capture-recapture (SCR) techniques allow exploration of second- and third-order selection simultan
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Marrotte, Robby R., Eric J. Howe, Kaela B. Beauclerc, Derek Potter, and Joseph M. Northrup. "Explaining detection heterogeneity with finite mixture and non-Euclidean movement in spatially explicit capture-recapture models." PeerJ 10 (June 7, 2022): e13490. http://dx.doi.org/10.7717/peerj.13490.

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Landscape structure affects animal movement. Differences between landscapes may induce heterogeneity in home range size and movement rates among individuals within a population. These types of heterogeneity can cause bias when estimating population size or density and are seldom considered during analyses. Individual heterogeneity, attributable to unknown or unobserved covariates, is often modelled using latent mixture distributions, but these are demanding of data, and abundance estimates are sensitive to the parameters of the mixture distribution. A recent extension of spatially explicit cap
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Law, Bradley, Traecey Brassil, Roland Proud, and Joanne Potts. "Estimating density of forest bats and their long‐term trends in a climate refuge." Ecology and Evolution 13, no. 6 (2023): e10215. https://doi.org/10.5281/zenodo.14818141.

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(Uploaded by Plazi for the Bat Literature Project) For many species, estimating density is challenging, but it is important for conservation planning and understanding the functional role of species. Bats play key ecological roles, yet little is known about their free-­ranging density. We used a long-­term banding study of four species caught in an extensively forested climate refuge and spatial capture–­recapture models (SCR) to estimate density and its change over time. Between 1999 and 2020, there were 3671 captures of four bat species, which were all edge-­space foragers. Recaptures repres
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Jiménez, José, Raquel Godinho, Daniel Pinto, et al. "The Cantabrian capercaillie: A population on the edge." Science of The Total Environment 821 (January 29, 2022): 153523. https://doi.org/10.5281/zenodo.6352583.

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<strong>Highlights</strong> Cantabrian capercaillie population has recently been classified as &quot;Critically Endangered&quot; by Spanish Government. To develop management plans, information on demographic parameters are necessary to understand population dynamics. In 2019 we estimated the size of population at 191 individuals. Since the 1970s, we estimated a shrinkage of the population range by 83%. Apparent annual survival was estimated at 0.707 and per-capita recruitment at 0.233. &nbsp; <strong>Abstract</strong> The capercaillie <em>Tetrao urogallus</em> - the world&#39;s largest grouse
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F., Muammar, Abdullah, Muhibbuddin, Safrida, and Zulfikar. "Effects of Transforming Plantation Forests into Natural Forests on Elephant Habitats and Movement in Trumon-Subulussalam, Aceh." IOP Conference Series: Earth and Environmental Science 1477, no. 1 (2025): 012026. https://doi.org/10.1088/1755-1315/1477/1/012026.

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Abstract The restoration of plantation forests to natural forests had become an important approach in biodiversity conservation, especially for endangered species such as the Sumatran elephant (Elephas maximus sumatranus). This study aimed to assess the impact of the transformation of plantation forests into natural forests on the habitat and movement of Sumatran elephants in the Trumon-Subulussalam. The study population was the Sumatran elephant and the research sample was part of the elephant population in the form of evidence of the existence of elephants through purposive sampling techniqu
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Dissertations / Theses on the topic "Spatial capture-recapture (SCR)"

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Black, Thomas William. "Ecology of an island mouse, Apodemus sylvaticus hirtensis." Thesis, University of Edinburgh, 2016. http://hdl.handle.net/1842/20411.

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An island subspecies endemic to the remote St Kilda archipelago, Apodemus sylvaticus hirtensis is considered of national importance but has been little studied, despite its inclusion in the criteria for the islands’ designation as a World Heritage Site. This study expands our knowledge of the core ecology of the mice; distribution, morphology, age structure, breeding phenology, population density, range size, survival and fecundity are all described and quantified using data collected from 4462 captures of 787 individuals between 2009-2012 on three sites (Carn Mor, Glen Bay & Village Bay), 1-2
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Kidney, Darren. "Random coeffcient models for complex longitudinal data." Thesis, University of St Andrews, 2014. http://hdl.handle.net/10023/6386.

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Longitudinal data are common in biological research. However, real data sets vary considerably in terms of their structure and complexity and present many challenges for statistical modelling. This thesis proposes a series of methods using random coefficients for modelling two broad types of longitudinal response: normally distributed measurements and binary recapture data. Biased inference can occur in linear mixed-effects modelling if subjects are drawn from a number of unknown sub-populations, or if the residual covariance is poorly specified. To address some of the shortcomings of previous
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Book chapters on the topic "Spatial capture-recapture (SCR)"

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Royle, J. Andrew, Richard B. Chandler, Rahel Sollmann, and Beth Gardner. "Statistical Models and SCR." In Spatial Capture-recapture. Elsevier, 2014. http://dx.doi.org/10.1016/b978-0-12-405939-9.00002-5.

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Reports on the topic "Spatial capture-recapture (SCR)"

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Underwood, H., Madison Hand, Donald Leopold, Madison Hand, Donald Leopold, and H. Underwood. Abundance and distribution of white-tailed deer on First State National Historical Park and surrounding lands. National Park Service, 2024. http://dx.doi.org/10.36967/2305428.

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We estimated both abundance and distribution of white-tailed deer (Odocoileus virginianus) on the Brandywine Valley unit of First State National Historical Park (FRST) and the Brandywine Creek State Park (BCSP) during 2020 and 2021 with two widely used field methods ? a road-based count and a network of camera traps. We conducted 24 road-based counts, covering 260 km of roadway, and deployed up to 16 camera traps, processing over 82,000 images representing over 5,000 independent observations. In both years, we identified bucks based on their body and antler characteristics, tracking their move
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Wang, Guiming, Bronson Strickland, and Xueyan Shan. Vicksburg National Military Park white‐tailed deer survey. National Park Service, 2025. https://doi.org/10.36967/2307610.

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White-tailed deer (WTD) can exert substantial impacts on the ecosystems in the Southeastern United States, particularly by overabundant WTD populations that are sheltered from recreational hunting pressure such as those in the National Parks. Information on WTD abundance and density is indispensable for science-based WTD population management. WTD populations in Vicksburg National Military Park (VICK) have not been surveyed since 2010. Management of WTD populations has been challenged by the lack of reliable, cost-effective methods, such as a deer visual count-density calibration coefficient,
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