Full Text Journal Articles by
Author Andrew Royle

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Estimating spatially and temporally complex range dynamics when detection is imperfect

Clark Rushing, Andrew Royle, David Ziolkowski, Keith Pardieck,

Abstract Species distributions are determined by the interaction of multiple biotic and abiotic factors, which produces complex spatial and temporal patterns of occurrence. As habitats and climate change due to anthropogenic activities, there is a need to develop species distribution models that can quantify these complex range dynamics. In this ... Read more >>

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Adaptive Sampling for Spatial Capture-Recapture: An efficient sampling scheme for rare or patchily distributed species

Alec Wong, Angela Fuller, Andrew Royle,

Abstract Rare species present challenges to data collection, particularly when the species is spatially clustered over large areas, such that the encounter frequency of the organism is low. Sampling where the organism is absent consumes resources, and offers relatively low-quality information which are often difficult to model using standard statistical ... Read more >>

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Spatial Mark-Resight for Categorically Marked Populations with an Application to Genetic Capture-Recapture

Ben Augustine, Frances Stewart, Andrew Royle, Jason Fisher, Marcella Kelly,

Abstract The estimation of animal population density is a fundamental goal in wildlife ecology and management, commonly met using mark recapture or spatial mark recapture (SCR) study designs and statistical methods. Mark-recapture methods require the identification of individuals; however, for many species and sampling methods, particularly noninvasive methods, no individuals ... Read more >>

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Modeling sound attenuation in heterogeneous environments for improved bioacoustic sampling of wildlife populations

Andrew Royle,

Abstract Acoustic sampling methods are becoming increasingly important in biological monitoring. Sound attenuation is one of the most important dynamics affecting the utility of bioacoustic data as it directly affects the probability of detection of individuals from bioacoustic arrays and especially the localization of acoustic signals necessary in telemetry studies. ... Read more >>

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Spatial Capture-Recapture for Categorically Marked Populations with An Application to Genetic Capture-Recapture

Ben Augustine, Andrew Royle, Sean Murphy, Richard Chandler, John Cox, Marcella Kelly,

Abstract Recently introduced unmarked spatial capture-recapture (SCR), spatial mark-resight (SMR), and 2-flank spatial partial identity models (SPIM) extend the domain of SCR to populations or observation systems that do not always allow for individual identity to be determined with certainty. For example, some species do not have natural marks that ... Read more >>

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Unifying Population and Landscape Ecology with Spatial Capture-recapture

Andrew Royle, Angela Fuller, Christopher Sutherland,

Abstract Spatial heterogeneity in the environment induces variation in population demographic rates and dispersal patterns, which result in spatio-temporal variation in density and gene flow. Unfortunately, applying theory to learn about the role of spatial structure on populations has been hindered by the lack of mechanistic spatial models and inability ... Read more >>

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Examining the occupancy-density relationship for a low density carnivore

Daniel Linden, Angela Fuller, Andrew Royle, Matthew Hare,

1. The challenges associated with monitoring low-density carnivores across large landscapes have limited the ability to implement and evaluate conservation and management strategies for such species. Noninvasive sampling techniques and advanced statistical approaches have alleviated some of these challenges and can even allow for spatially explicit estimates of density, arguably ... Read more >>

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Spatial Capture-Recapture with Partial Identity: An Application to Camera Traps

Ben Augustine, Andrew Royle, Marcella Kelly, Christopher Satter, Robert Alonso, Erin Boydston, Kevin Crooks,

Camera trapping surveys frequently capture individuals whose identity is only known from a single flank. The most widely used methods for incorporating these partial identity individuals into density analyses discard some of the partial identity capture histories, reducing precision, and while not previously recognized, introducing bias. Here, we present the ... Read more >>

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Nicotinic Acid Adenine Dinucleotide Phosphate (NAADP) and Endolysosomal Two-pore Channels Modulate Membrane Excitability and Stimulus-Secretion Coupling in Mouse Pancreatic β Cells.

Abdelilah Arredouani, Margarida Ruas, Stephan C Collins, Raman Parkesh, Frederick Clough, Toby Pillinger, George Coltart, Katja Rietdorf, Andrew Royle, Paul Johnson, Matthias Braun, Quan Zhang, William Sones, Kenju Shimomura, Anthony J Morgan, Alexander M Lewis, Kai-Ting Chuang, Ruth Tunn, Joaquin Gadea, Lydia Teboul, Paula M Heister, Patricia W Tynan, Elisa A Bellomo, Guy A Rutter, Patrik Rorsman, Grant C Churchill, John Parrington, Antony Galione,

Pancreatic β cells are electrically excitable and respond to elevated glucose concentrations with bursts of Ca(2+) action potentials due to the activation of voltage-dependent Ca(2+) channels (VDCCs), which leads to the exocytosis of insulin granules. We have examined the possible role of nicotinic acid adenine dinucleotide phosphate (NAADP)-mediated Ca(2+) release ... Read more >>

J. Biol. Chem. (The Journal of biological chemistry)
[2015, 290(35):21376-21392]

Cited: 22 times

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Modelling community dynamics based on species-level abundance models from detection/nondetection data

Yuichi Yamaura, J Andrew Royle, Kouji Kuboi, Tsuneo Tada, Susumu Ikeno, Shun'ichi Makino,

1. In large-scale field surveys, a binary recording of each species' detection or nondetection has been increasingly adopted for its simplicity and low cost. Because of the importance of abundance in many studies, it is desirable to obtain inferences about abundance at species-, functional group-, and community-levels from such binary ... Read more >>

(Journal of applied ecology.)
[2011, 48(1):67-75]

Cited: 6 times

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Hierarchical modelling and estimation of abundance and population trends in metapopulation designs.

Marc Kéry, J Andrew Royle,

1. Population assessment in changing environments is challenging because factors governing abundance may also affect detectability and thus bias observed counts. We describe a hierarchical modelling framework for estimating abundance corrected for detectability in metapopulation designs, where observations of 'individuals' (e.g. territories) are replicated in space and time. We consider ... Read more >>

J Anim Ecol (The Journal of animal ecology)
[2010, 79(2):453-461]

Cited: 24 times

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Multi-species occurrence models to evaluate the effects of conservation and management actions

Zipkin, Andrew Royle, Dawson, Bates,

Conservation and management actions often have direct and indirect effects on a wide range of species. As such, it is important to evaluate the impacts that such actions may have on both target and non-target species within a region. Understanding how species richness and composition differ as a result of ... Read more >>

Biol. Conserv. (Biological conservation.)
[2010, 143(2):479-484]

Cited: 35 times

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Impacts of forest fragmentation on species richness: a hierarchical approach to community modelling

Zipkin, DeWan, Andrew Royle,

1. Species richness is often used as a tool for prioritizing conservation action. One method for predicting richness and other summaries of community structure is to develop species-specific models of occurrence probability based on habitat or landscape characteristics. However, this approach can be challenging for rare or elusive species for ... Read more >>

(Journal of applied ecology.)
[2009, 46(4):815-822]

Cited: 37 times

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Hierarchical Modeling of Cluster Size in Wildlife Surveys.

Royle,

(Journal of Agricultural, Biological, and Environmental Statistics)
[2008, 13(1):23-36]

Cited: 1 time

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The role of species abundance in determining breeding origins of migratory birds with stable isotopes

J Andrew Royle, Dustin R. Rubenstein,

Understanding the breeding origins of migratory birds captured on their wintering grounds has important management and conservation implications for declining populations of songbirds. Stable isotopes have recently been used to infer origins for species where application of conventional markers fails. A natural method of linking wintering birds to breeding populations, ... Read more >>

Ecol Appl (Ecological applications : a publication of the Ecological Society of America)
[2004, 14(6):1780-1788]

Cited: 0 times

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