Results 21 to 30 of about 28,708 (233)

Bayesian mark–recapture–resight–recovery models: increasing user flexibility in the BUGS language

open access: yesEcosphere, 2021
Estimating demographic parameters of interest is a critical component of applied conservation biology and evolutionary ecology, where demographic models and demographic data have become increasingly complex over the last several decades.
Thomas V. Riecke   +5 more
doaj   +1 more source

Extending the Latent Multinomial Model with Complex Error Processes and Dynamic Markov Bases [PDF]

open access: yes, 2015
The latent multinomial model (LMM) model of Link et al. (2010) provided a general framework for modelling mark-recapture data with potential errors in identification. Key to this approach was a Markov chain Monte Carlo (MCMC) scheme for sampling possible
Bonner, Simon J   +3 more
core   +3 more sources

Rejection of Schmidt et al.'s estimators for bear population size

open access: yesEcology and Evolution, 2019
Aerial distance sampling of bears to estimate population size has been used throughout many parts of Alaska. The distance sampling models are complex since they need to account for undetected bears and differences in detection probabilities.
Earl Becker, Aaron Christ
doaj   +1 more source

Abundance of bottlenose dolphins, Tursiops truncatus (Cetacea: Delphinidae), inhabiting the Patos Lagoon estuary, southern Brazil: implications for conservation

open access: yesZoologia (Curitiba), 2011
A new mark-recapture abundance estimate and a photographic census were carried out to investigate the possible decline in the abundance of the bottlenose dolphins, Tursiops truncatus (Montagu, 1821), in the Patos Lagoon estuary due to the high levels of ...
Pedro F Fruet   +3 more
doaj   +1 more source

Full Open Population Capture-Recapture Models with Individual Covariates [PDF]

open access: yes, 2010
Traditional analyses of capture-recapture data are based on likelihood functions that explicitly integrate out all missing data. We use a complete data likelihood (CDL) to show how a wide range of capture-recapture models can be easily fitted using ...
Barker, Richard J.   +1 more
core   +1 more source

An 11-digit identification system for individual Nile crocodiles using natural markings

open access: yesKoedoe: African Protected Area Conservation and Science, 2016
Research and conservation of wild crocodiles and husbandry of captive crocodiles requires the reliable identification of individuals. We present a method using the individual colour markings on the first 10 single-crest scutes on the tails of Nile ...
Hindrik Bouwman, Enrico Cronje
doaj   +1 more source

Isolation by distance in a population of a small land snail Trochoidea geyeri : evidence from direct and indirect methods [PDF]

open access: yes, 2006
Population structure was estimated in a continuous population of a small land snail (Trochoidea geyeri). Mark-recapture experiments and randomly amplified polymorphic DNA analyses indicate that the population structure can be described by the isolation ...
Bahl, Andreas   +2 more
core   +1 more source

Towards the mother-of-all-models: customised construction of the mark-recapture likelihood function [PDF]

open access: yesAnimal Biodiversity and Conservation, 2004
With a proliferation of mark–recapture models and studies collecting mark–recapture data, software and analysis methods are being continually revised. We consider the construction of the likelihood for a general model that incorporates all the features ...
Barker, R. J., White, G. C.
doaj  

Study design and mark-recapture estimates of dispersal: A case study with the endangered damselfly Coenagrion mercuriale [PDF]

open access: yes, 2012
Accurate data on dispersal ability are vital to the understanding of how species are affected by fragmented landscapes. However, three factors may limit the ability of field studies to detect a representative sample of dispersal events: (1) the number of
Hassall, C, Thompson, DJ
core   +1 more source

An evaluation of population indices for northern bobwhite

open access: yesWildlife Society Bulletin, 2019
Northern bobwhite (Colinus virginianus) populations are monitored using 2 general approaches—population indices and abundance estimators. Due to their convenient sampling designs, indices are commonly used by land managers and researchers to predict or ...
Bradley W. Kubečka   +5 more
doaj   +1 more source

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