Results 31 to 40 of about 3,260,677 (239)

Does Your Species Have Memory? Analysing Capture-Recapture Data with Memory Models. [PDF]

open access: yes, 2014
1. We examine memory models for multi-site capture-recapture data. This is an important topic,as animals may exhibit behaviour that is more complex than simple first-order Markov movement between sites, when it is necessary to devise and fit appropriate ...
Morgan, Byron J. T.   +12 more
core   +1 more source

How does spatial study design influence density estimates from spatial capture-recapture models? [PDF]

open access: yesPLoS ONE, 2012
When estimating population density from data collected on non-invasive detector arrays, recently developed spatial capture-recapture (SCR) models present an advance over non-spatial models by accounting for individual movement.
Rahel Sollmann   +2 more
doaj   +1 more source

Embedding population dynamics in mark-recapture models [PDF]

open access: yes, 2009
Mark-recapture methods use repeated captures of individually identifiable animals to provide estimates of properties of populations. Different models allow estimates to be obtained for population size and rates of processes governing population dynamics.
Bishop, Jonathan R. B.
core   +2 more sources

A generalised likelihood framework for partially observed capture-recapture-recovery models [PDF]

open access: yes, 2013
We provide a closed form likelihood expression for multi-state mark-recapture-recovery data when the state of an individual may be only partially observed.
McCrea, Rachel S.   +2 more
core   +1 more source

Recommendations for photo-identification methods used in capture-recapture models with cetaceans [PDF]

open access: yes, 2015
Capture-recapture methods are frequently employed to estimate abundance of cetaceans using photographic techniques and a variety of statistical models. However, there are many unresolved issues regarding the selection and manipulation of images that can ...
Read, Andrew J   +9 more
core   +1 more source

Estimating abundance of rare, small mammals: A case study of the Key Largo woodrat (Neotoma floridana smalli) [PDF]

open access: yes, 2011
Estimates of animal abundance or density are fundamental quantities in ecology and conservation, but for many species such as rare, small mammals, obtaining robust estimates is problematic.
Potts, Joanne M.
core   +2 more sources

Estimating fault numbers remaining after testing [PDF]

open access: yes, 2013
Testing is an essential component of the software development process, but also one which is exceptionally difficult to manage and control. For example, it is well understood that testing techniques are not guaranteed to detect all faults, but more ...
Roper, Marc
core   +4 more sources

Face Value: Towards Robust Estimates of Snow Leopard Densities. [PDF]

open access: yesPLoS ONE, 2015
When densities of large carnivores fall below certain thresholds, dramatic ecological effects can follow, leading to oversimplified ecosystems. Understanding the population status of such species remains a major challenge as they occur in low densities ...
Justine S Alexander   +3 more
doaj   +1 more source

Estimating Wildlife Density as a Function of Environmental Heterogeneity Using Unmarked Data

open access: yesRemote Sensing, 2022
Recent developments to spatial-capture recapture models have allowed their use on species whose members are not uniquely identifiable from photographs by including individual identity as a latent, unobserved variable in the model.
Thomas Connor   +10 more
doaj   +1 more source

Best practices for reporting individual identification using camera trap photographs

open access: yesGlobal Ecology and Conservation, 2020
Camera traps have become a popular sampling tool in ecological studies. This is especially true for studies that estimate population densities through spatial capture-recapture models of species with physical traits allowing individual identification ...
Yan Ru Choo   +5 more
doaj   +1 more source

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