Rutegwa M, Gebauer R, Veselý L, Regenda J, Strunecký O, Hejzlar J, Drozd B

Diffusive methane emissions from temperate semi-intensive carp ponds

Assessing the environmental impacts of aquaculture is a step towards ecologically and economically sustainable aquaculture. Rutegwa et al. aimed to determine and compare levels of dissolved and diffusive CH₄ between nursery and main carp ponds with different feeding rates and organic loading and to investigate influencing factors. Surface CH₄ concentrations were measured, and diffusive CH₄ flux was estimated using a wind-based trans-boundary layer model during one growing season. All ponds were sources of CH₄ with (mean ± SD) diffusive CH₄ fluxes higher in nursery ponds (9.1 ± 6.8 mg C m^-2 d^-1than in main ponds (6.4 ± 6.9 mg C m^-2 d^-1). This study provides information on the role of carp aquaculture in greenhouse gas emission in temperate regions.

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