Sampling Design for Spatially Explicit Capture-Recapture R package secrdesign version 2.10.1 Tools for designing spatially explicit capture-recapture studies of animal populations. This is primarily a simulation manager for package 'secr'. Extensions in version 2.5.0 include costing and evaluation of detector spacing. Software Depends: R (>= 3.5.0), secr (>= 5.3.0) Imports: abind, kofnGA, parallel, sf, Rcpp (>= 0.12.14) LinkingTo: BH, Rcpp, RcppArmadillo Suggests: secrlinear, ipsecr (>= 1.4.0), testthat (>= 0.11.0), openCR Murray Efford <murray.efford@otago.ac.nz> Comprehensive R Archive Network (CRAN) Murray Efford [aut, cre] (ORCID: <https://orcid.org/0000-0001-5231-5184>), Ian Durbach [ctb] (ORCID: <https://orcid.org/0000-0003-0769-2153>) GPL (>= 2) 2026-01-08 application/tgz https://CRAN.R-project.org/package=secrdesign doi:10.32614/CRAN.package.secrdesign