Foto de stock - 18 October 2021, Mecklenburg-Western Pomerania, Rostock: Harry Palm, professor at the Faculty of Agricultural and Environmental Sciences at the University of Rostock, stands between water basins in an aquaculture research facility for breeding African catfish. In the experimental facility for aquaponics, the interaction between fish and plant cultivation is being researched. What the fish leave behind in the water serves as a nutrient for the plants. Afterwards, the plants in turn clean the water from the breeding tanks. (to dpa ""Aquaponics research: How catfish become calm with valerian and cucumbers"") Photo: Jens Büttner/dpa-Zentralbild/dpa. - Rostock/Mecklenburg-Western Pomerania/Germany

Imagen: 18 October 2021, Mecklenburg-Western Pomerania, Rostock: Harry Palm, professor at the Faculty of Agricultural and Environmental Sciences at the University of.

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