This deposit contains two companion archives required to reproduce the analyses and manuscript outputs for the harbour porpoise strandings demographic-bias study. The archives are designed to be used together. Archive contents 1. porpoise-strandings-code-v1.0.0.zipR source code and manuscript materials, including: Analysis pipeline code/run-all.R code/setup.R code/analysis/*.R Manuscript sources manuscript/porpoise-strandings-manuscript.Rmd manuscript/porpoise-strandings-supplementary.Rmd Manuscript rendering script manuscript/render_manuscript.R Word reference template manuscript/styles/reference.docx Reproducibility information manuscript/zenodo/sessionInfo.txt 2. porpoise-strandings-data-outputs-v1.0.0.zipInput data and derived outputs used in the manuscript, including: Raw input data data/raw/strandings.csv (derived from the supplementary dataset of IJsseldijk et al. 2020) Data metadata and provenance data/metadata/strandings.md Generated figures outputs/figures/ Generated summary and statistical tables outputs/tables_summary/ outputs/tables_stats/ Intended use The two archives should be unpacked into the same parent directory prior to running any scripts. Reproducing the analyses and manuscript Unzip both archives into a single root folder. Run the full analysis pipeline: Rscript code/run-all.R Render the manuscript and supplementary material: Rscript manuscript/render_manuscript.R false false