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Data for "Seasonal movements of post-breeding royal terns (Thalasseus maximus) in Virginia suggest resource tracking"

Royal tern tracking data for analysis in R via the momentumHMM package:

*REQUIRES R statistical software which is freely available here: https://cran.r-project.org. The package and data analysis are all within the R statistical framework.

For information: dcatlin@vt.edu, reference ROYT tracking project # R version 4.4.1 "Race for your life".

These are tracking data collected from ( Royal terns that were nesting on Rip-raps Island. For full description of the model and the package, see the manuscript.

Model. We assumed step length at each time step followed a gamma distribution, and we modelled the mean and the standard deviation in step length as a function of period. We assumed that individual turning angles (i.e., short-term persistence in the path of travel) followed a wrapped Cauchy distribution with a mean of 0 (i.e., no change from prior path of travel) and a concentration parameter that was a function of period, where higher concentration values indicate lower variance around the mean (circular-linear regression model, McClintock and Michelot 2018).

Also see momentuHMM vignette:
https://cran.r-project.org/web/packages/momentuHMM/vignettes/momentuHMM.pdf


Also see:
McClintock, BT, T Michelot. 2018. momentuHMM: R package for generalized hidden Markov models of animal movement. Methods in Ecology and Evolution 9: 1518–1530. Doi: 10.1111/2041-210X.12995

History

Publisher

University Libraries, Virginia Tech

Location

Rip-raps Island, Hampton, VA

Corresponding Author Name

Daniel Catlin

Corresponding Author E-mail Address

dcatlin@vt.edu

Files/Folders in Dataset and Description

PeerJ.Data.RData - This data file can be used with the accompanying R code to perform the analysis of Royal tern movement data from Weithman et al. Model_Code.R - Contains R code and model descriptions.

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