Total mercury (THg) in dorsal muscle of Prionace glauca from Ilo, Peru: dataset and statistical analyses

Dataset and reproducible R analysis code accompanying the manuscript "Baseline mercury concentrations and dietary risk assessment in blue shark (Prionace glauca) from Ilo, southern Peru" (submitted as a Baseline article to Marine Pollution Bulletin). The dataset contains individual total mercury (THg) measurements in dorsal muscle tissue of 12 blue shark (Prionace glauca) specimens — six males and six females, total length 167–230 cm — landed at the Artisanal Fishing Port (DPA) of Ilo, Moquegua Region, southern Peru, on 12 October 2021. THg was quantified by cold-vapour atomic absorption spectrometry (CV-AAS) following NOM-117-SSA1-1994 at an ISO/IEC 17025-accredited laboratory (CERPER S.A., Test Report No. 2-00521/21). The deposit also includes two reproducible R scripts that perform descriptive statistics, hypothesis tests, linear regression, non-carcinogenic dietary-risk assessment (Target Hazard Quotient and Estimated Weekly Intake relative to the JECFA Provisional Tolerable Weekly Intake), and generation of all figures and APA-formatted tables in the manuscript and supplementary material. Changes from v1: dataset typo corrected (specimen ID 6: 0.218 → 0.216 mg/kg, matching the analytical report); R analysis script corrected (Child consumption-rate scenario unified at 30 g/d; international comparison values verified against primary sources; citation re-attributed to Reátegui-Quispe & Pariona-Velarde 2019 for the southern-Peru Hg range). See README.md for full details.