CO₂ and CH₄ Fluxes in Tilapia (Oreochromis niloticus) and Grass Carp (Ctenopharyngodon idella) Earthen Aquaculture Ponds

This dataset contains measurements of CO₂ and CH₄ fluxes from aquaculture ponds over a complete 13‑month production cycle. Data were collected in monoculture systems of Nile tilapia (Oreochromis niloticus), monoculture systems of grass carp (Ctenopharyngodon idella), and polyculture systems combining both species. The dataset includes monthly and diel variations in greenhouse gas emissions, as well as calculations of the carbon footprint expressed in kg CO₂eq per kg of fish produced. Files are provided in CSV and XLSX formats, enabling statistical analysis, replication of results, and comparison with other aquaculture emission studies.