Browsing by Subject "aerial survey"

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    R code and data for "Comparing multiple survey and recruitment-mortality models to assess growth rates and population projections"
    (2019-09-23) Severud, William J; DelGiudice, Glenn D; Bump, Joseph K; seve0135@umn.edu; Severud, William J; Minnesota Department of Natural Resources Forest Wildlife Populations and Research Group
    This collection of files provides data and R code supporting the publication "Comparing survey and multiple recruitment-mortality models to assess growth rates and population projections" in Ecology and Evolution. We provide all necessary data not included in the manuscript to reproduce the analysis of growth rates and population projections of moose in northeastern Minnesota.
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    R code and output supporting: Time series sightability modeling of animal populations
    (2017-03-29) ArchMiller, Althea A; Fieberg, John R; Dorazio, Robert M; St. Clair, Katherine; althea.archmiller@gmail.com; ArchMiller, Althea A
    The goal of our study was to expand a previously developed model-based approach to include random effects and a temporal spline for time series modeling of multiple years of operational survey data. We developed a Bayesian hierarchical model as our framework to build and compare fixed-effects and temporal model-based sightability models applied to 12 years of MN moose operational survey data. Here, we share the Program R code and data necessary to replicate the manuscript results that demonstrate how our time series sightability modeling approach can increase the precision of population estimators and predict population dynamics with smoother (and thus more realistic trends) through time.