Bayesian Time-Stratified Population Analysis R package BTSPAS version 2024.11.1 Provides advanced Bayesian methods to estimate abundance and run-timing from temporally-stratified Petersen mark-recapture experiments. Methods include hierarchical modelling of the capture probabilities and spline smoothing of the daily run size. Theory described in Bonner and Schwarz (2011) <doi:10.1111/j.1541-0420.2011.01599.x>. Software Imports: actuar, coda, data.table, ggplot2, ggforce, graphics, grDevices, gridExtra, plyr, reshape2, R2jags, scales, splines, stats, utils Suggests: R.rsp Carl J Schwarz <cschwarz.stat.sfu.ca@gmail.com> Comprehensive R Archive Network (CRAN) Carl J Schwarz [aut, cre], Simon J Bonner [aut] GPL (>= 2) 2024-10-23 application/tgz https://CRAN.R-project.org/package=BTSPAS doi:10.32614/CRAN.package.BTSPAS