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mrds - Mark-RecaptureDistance Sampling

What ismrds?

This package for R analyzes single or double observer distancesampling data for line or point sampling. It is used in programDISTANCE as one of the analysisengines. Supported double observer configurations include independent,trial and removal. Not all options in mrds are fully supported viaDISTANCE.

If you only wish to perform a conventional or multiple covariatedistance sampling analysis (CDS/MCDS) (as opposed to a double observeranalysis), you may want to try theDistance R package,which has a simplified interface and is available fromhttps://github.com/DistanceDevelopment/Distance.

Gettingmrds

The easiest way to ensure you have the latest version ofmrds, is to install using theremotespackage:

  install.packages("remotes")

then installmrds from github:

  library(remotes)  install_github("DistanceDevelopment/mrds")

Otherwise:

• One can download a Windows package binary using the“Releases”tab in github. To install in R, from the R menu, use “PackagesfromLocal Zip file” and browse to location of downloaded zip.
• Or, downloadpackagesource files.
• Finally the current stable version ofmrds isavailable on CRAN,though this may be up to a month out of date due to CRAN policy.

References

The following are references for the methods used in the package.

Burt, M. L., D. L. Borchers, K. J. Jenkins and T. A. Marques. (2014).“Using mark-recapturedistance sampling methods on line transect surveys.” Methods inEcology and Evolution 5: 1180-1191.

Buckland, S. T., J. Laake, et al. (2010). “Double observer linetransect methods: levels of independence.” Biometrics 66: 169-177.

Borchers, D. L., J. L. Laake, et al. (2006). “Accommodating unmodeledheterogeneity in double-observer distance sampling surveys.” Biometrics62(2): 372-378.

Buckland, S. T., D. R. Anderson, et al., Eds. (2004). Advanceddistance sampling: estimating abundance of biological populations.Oxford, UK; New York, Oxford University Press. (see chapter 6).