Systematic review of mercury values in penguins' feathers and blood [dataset]

[Description of methods used for collection/generation of data] A systematic bibliographic review was conducted using the PRISMA approach and guidelines (Page et al., 2021). Scopus database (https://www.scopus.com) was used to obtain the preliminary list of papers (up to January 2022) to be screened through a broad search that included “penguin” and “pollutants” terms in the title, abstract or the keywords. See a detailed description of all the process in Gimeno et al., 2023 (https://doi.org/10.1016/j.envpol.2023.123159).