Full Text Journal Articles by
Author Ben Augustine

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Improving estimation of puma (Puma concolor) population density: clustered camera-trapping, telemetry data, and generalized spatial mark-resight models.

Sean M Murphy, David T Wilckens, Ben C Augustine, Mark A Peyton, Glenn C Harper,

Obtaining reliable population density estimates for pumas (Puma concolor) and other cryptic, wide-ranging large carnivores is challenging. Recent advancements in spatially explicit capture-recapture models have facilitated development of novel survey approaches, such as clustered sampling designs, which can provide reliable density estimation for expansive areas with reduced effort. We applied ... Read more >>

Sci Rep (Scientific reports)
[2019, 9(1):4590]

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Sex-specific population dynamics and demography of capercaillie (Tetrao urogallus L.) in a patchy environment

Ben Augustine, Marc Kéry, Juanita Olano Marin, Pierre Mollet, Gilberto Pasinelli, Chris Sutherland,

Abstract <jats:list list-type="order"><jats:list-item> Modeling the population dynamics of patchily distributed species is a challenge, particularly when inference must be based on incomplete and small data sets such as those from most species of conservation concern. Open population spatial capture-recapture (SCR) models are ideally suited to quantify population trends, but have ... 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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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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Consequences of severe habitat fragmentation on density, genetics, and spatial capture-recapture analysis of a small bear population.

Sean M Murphy, Ben C Augustine, Wade A Ulrey, Joseph M Guthrie, Brian K Scheick, J Walter McCown, John J Cox,

Loss and fragmentation of natural habitats caused by human land uses have subdivided several formerly contiguous large carnivore populations into multiple small and often isolated subpopulations, which can reduce genetic variation and lead to precipitous population declines. Substantial habitat loss and fragmentation from urban development and agriculture expansion relegated the ... Read more >>

PLoS ONE (PloS one)
[2017, 12(7):e0181849]

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Seroprevalence of Toxoplasma gondii in American Black Bears ( Ursus americanus ) of the Central Appalachians, USA.

John J Cox, Sean M Murphy, Ben C Augustine, Joseph M Guthrie, John T Hast, Sutton C Maehr, Joseph McDermott,

We assessed Toxoplasma gondii seroprevalence in 53 free-ranging American black bears ( Ursus americanus ) in the Central Appalachian Mountains, US. Seroprevalence was 62% with no difference between males and females or between juvenile and adult bears. Wildlife agencies should consider warnings in hunter education programs to reduce the chances ... Read more >>

J. Wildl. Dis. (Journal of wildlife diseases)
[2017, 53(3):671-673]

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Mass mortality of eastern box turtles with upper respiratory disease following atypical cold weather.

Mickey Agha, Steven J Price, A Justin Nowakowski, Ben Augustine, Brian D Todd,

Emerging infectious diseases cause population declines in many ectotherms, with outbreaks frequently punctuated by periods of mass mortality. It remains unclear, however, whether thermoregulation by ectotherms and variation in environmental temperature is associated with mortality risk and disease progression, especially in wild populations. Here, we examined environmental and body temperatures ... Read more >>

Dis. Aquat. Org. (Diseases of aquatic organisms)
[2017, 124(2):91-100]

Cited: 2 times

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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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Hidden semi-Markov models reveal multiphasic movement of the endangered Florida panther.

Madelon van de Kerk, David P Onorato, Marc A Criffield, Benjamin M Bolker, Ben C Augustine, Scott A McKinley, Madan K Oli,

Animals must move to find food and mates, and to avoid predators; movement thus influences survival and reproduction, and ultimately determines fitness. Precise description of movement and understanding of spatial and temporal patterns as well as relationships with intrinsic and extrinsic factors is important both for theoretical and applied reasons. ... Read more >>

J Anim Ecol (The Journal of animal ecology)
[2015, 84(2):576-585]

Cited: 5 times

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Effect of variable transmission rate on the dynamics of HIV in sub-Saharan Africa.

Diego F Cuadros, Philip H Crowley, Ben Augustine, Sarah L Stewart, Gisela García-Ramos,

BACKGROUND: The cause of the high HIV prevalence in sub-Saharan Africa is incompletely understood, with heterosexual penile-vaginal transmission proposed as the main mechanism. Heterosexual HIV transmission has been estimated to have a very low probability; but effects of cofactors that vary in space and time may substantially alter this pattern. ... Read more >>

BMC Infect. Dis. (BMC infectious diseases)
[2011, 11:216]

Cited: 13 times

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