To cite package 'secr' in publications use:

  Efford, M. G. (2024). secr: Spatially explicit capture-recapture
  models. R package version 5.0.0.
  https://CRAN.R-project.org/package=secr

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {secr: Spatially explicit capture-recapture models},
    author = {Murray Efford},
    year = {2024},
    note = {R package version 5.0.0},
    url = {https://CRAN.R-project.org/package=secr},
  }