Eric J. Howe
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View article: Estimating the abundance of a polar bear subpopulation at their southern global extent
Estimating the abundance of a polar bear subpopulation at their southern global extent Open
Climate warming is causing global biodiversity loss, with impacts to ecosystem function. Warming in the Arctic outpaces global averages, and projected declines in Arctic sea ice have led to predictions of local extirpations for ice-associa…
View article: Estimating effective survey duration in camera trap distance sampling surveys
Estimating effective survey duration in camera trap distance sampling surveys Open
Among other approaches, camera trap distance sampling (CTDS) is used to estimate animal abundance from unmarked populations. It was formulated for videos and observation distances are measured at predetermined ‘snapshot moments’. Surveys r…
View article: Accounting for heterogeneous density and detectability in spatially explicit capture–recapture studies of carnivores
Accounting for heterogeneous density and detectability in spatially explicit capture–recapture studies of carnivores Open
Reliable estimates of population density are fundamental for managing and conserving wildlife. Spatially explicit capture–recapture (SECR) models in combination with information‐theoretic model selection criteria are frequently used to est…
View article: Estimating animal density using the <scp>Space‐to‐Event</scp> model and bootstrap resampling with motion‐triggered camera‐trap data
Estimating animal density using the <span>Space‐to‐Event</span> model and bootstrap resampling with motion‐triggered camera‐trap data Open
Over the past few decades, the use of camera‐traps has revolutionized our ability to monitor populations of wild terrestrial mammals. While methods to estimate abundance from individually‐identifiable animals are well‐established, they are…
View article: Broad‐scale genetic monitoring suggests density‐dependent dispersal in a large carnivore
Broad‐scale genetic monitoring suggests density‐dependent dispersal in a large carnivore Open
Characterizing patterns and drivers of dispersal is fundamental to our understanding of animal ecology and ultimately informing species conservation and management strategies. In this study, we used microsatellite data from 3941 individual…
View article: Experimental test of the efficacy of hunting for controlling human–wildlife conflict
Experimental test of the efficacy of hunting for controlling human–wildlife conflict Open
Human–wildlife conflict can cause major declines in wildlife populations and pose a threat to human safety and livelihoods. Large carnivores are among the most conflict‐prone species because they range widely, eat human‐associated foods, a…
View article: Factors affecting age at primiparity in black bears
Factors affecting age at primiparity in black bears Open
Effective wildlife management requires an understanding of the factors affecting population vital rates. Age at primiparity can be an important determinant of population growth rates. Thus, understanding the factors influencing age at prim…
View article: Peer Review #3 of "Explaining detection heterogeneity with finite mixture and non-Euclidean movement in spatially explicit capture-recapture models (v0.2)"
Peer Review #3 of "Explaining detection heterogeneity with finite mixture and non-Euclidean movement in spatially explicit capture-recapture models (v0.2)" Open
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 pop…
View article: Peer Review #3 of "Explaining detection heterogeneity with finite mixture and non-Euclidean movement in spatially explicit capture-recapture models (v0.1)"
Peer Review #3 of "Explaining detection heterogeneity with finite mixture and non-Euclidean movement in spatially explicit capture-recapture models (v0.1)" Open
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 pop…
View article: Peer Review #1 of "Explaining detection heterogeneity with finite mixture and non-Euclidean movement in spatially explicit capture-recapture models (v0.1)"
Peer Review #1 of "Explaining detection heterogeneity with finite mixture and non-Euclidean movement in spatially explicit capture-recapture models (v0.1)" Open
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 pop…
View article: Explaining detection heterogeneity with finite mixture and non-Euclidean movement in spatially explicit capture-recapture models
Explaining detection heterogeneity with finite mixture and non-Euclidean movement in spatially explicit capture-recapture models Open
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 p…
View article: Peer Review #1 of "Explaining detection heterogeneity with finite mixture and non-Euclidean movement in spatially explicit capture-recapture models (v0.2)"
Peer Review #1 of "Explaining detection heterogeneity with finite mixture and non-Euclidean movement in spatially explicit capture-recapture models (v0.2)" Open
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 pop…
View article: Peer Review #2 of "Explaining detection heterogeneity with finite mixture and non-Euclidean movement in spatially explicit capture-recapture models (v0.1)"
Peer Review #2 of "Explaining detection heterogeneity with finite mixture and non-Euclidean movement in spatially explicit capture-recapture models (v0.1)" Open
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 pop…
View article: Estimating animal abundance at multiple scales by spatially explicit capture–recapture
Estimating animal abundance at multiple scales by spatially explicit capture–recapture Open
Information about how animal abundance varies across landscapes is needed to inform management action but is costly and time‐consuming to obtain; surveys of a single population distributed over a large area can take years to complete. Surv…
View article: Estimating animal abundance and effort–precision relationship with camera trap distance sampling
Estimating animal abundance and effort–precision relationship with camera trap distance sampling Open
Effective monitoring methods are needed for assessing the state of biodiversity and detecting population trends. The popularity of camera trapping in wildlife surveys continues to increase as they are able to detect species in remote and d…
View article: Estimating abundance of African great apes
Estimating abundance of African great apes Open
All species and subspecies of African great apes are listed by the International Union for the Conservation of Nature as endangered or critically endangered, and populations continue to decline. As human populations and industry expand int…
View article: Model selection with overdispersed distance sampling data
Model selection with overdispersed distance sampling data Open
Distance sampling ( DS ) is a widely used framework for estimating animal abundance. DS models assume that observations of distances to animals are independent. Non‐independent observations introduce overdispersion, causing model selection…
View article: Distance sampling with camera traps
Distance sampling with camera traps Open
Summary Reliable estimates of animal density and abundance are essential for effective wildlife conservation and management. Camera trapping has proven efficient for sampling multiple species, but statistical estimators of density from cam…
View article: Determining causes of genetic isolation in a large carnivore (Ursus americanus) population to direct contemporary conservation measures
Determining causes of genetic isolation in a large carnivore (Ursus americanus) population to direct contemporary conservation measures Open
The processes leading to genetic isolation influence a population's local extinction risk, and should thus be identified before conservation actions are implemented. Natural or human-induced circumstances can result in historical or contem…
View article: Trends in body condition in polar bears (<i>Ursus maritimus</i>) from the Southern Hudson Bay subpopulation in relation to changes in sea ice
Trends in body condition in polar bears (<i>Ursus maritimus</i>) from the Southern Hudson Bay subpopulation in relation to changes in sea ice Open
Sea ice is declining over much of the Arctic. In Hudson Bay the ice melts completely each summer, and advances in break-up have resulted in longer ice-free seasons. Consequently, earlier break-up is implicated in declines in body condition…
View article: Genetic censusing identifies an unexpectedly sizeable population of an endangered large mammal in a fragmented forest landscape
Genetic censusing identifies an unexpectedly sizeable population of an endangered large mammal in a fragmented forest landscape Open
These census figures are more than three times greater than a previous estimate based on an extrapolation from small-scale nest count surveys that tend to underestimate population size. The distribution of genotype clusters and Y-chromosom…
View article: Additional file 2: of Genetic censusing identifies an unexpectedly sizeable population of an endangered large mammal in a fragmented forest landscape
Additional file 2: of Genetic censusing identifies an unexpectedly sizeable population of an endangered large mammal in a fragmented forest landscape Open
Chimpanzee genotypes. Genotype data for each typed chimpanzee across the 14 autosomal microsatellite loci used in this study.
View article: Additional file 1: of Genetic censusing identifies an unexpectedly sizeable population of an endangered large mammal in a fragmented forest landscape
Additional file 1: of Genetic censusing identifies an unexpectedly sizeable population of an endangered large mammal in a fragmented forest landscape Open
Allelic dropout rates by locus. Allelic dropout rates for each of the 14 autosomal microsatellite loci used in this study. Dropout rates and the number of loci needed to achieve 99% certainty regarding genotypes were calculated as describe…