117222 20240319080952.0 doi 10.3390/w14060935 sideral 128795 ART-2022-128795 eng Villarroel, M. Fish Welfare in Urban Aquaponics: Effects of Fertilizer for Lettuce (Lactuca sativa L.) on Some Physiological Stress Indicators in Nile Tilapia (Oreochromis niloticus L.) 2022 Access copy available to the general public Unrestricted The combination of hydroponics and aquaculture, or aquaponics, normally requires adding fertilizer to recirculated water to ensure optimal plant growth, but the effect of that fertilizer on fish welfare has not been studied in detail, especially for small urban and coupled aquaponic systems. In this study, a commercial fertilizer was placed in two small aquaponic systems (less than 250 liters each) to test its effect on the stress levels of Nile tilapia (Oreochromis niloticus) compared to controls without any fertilizer. Fish production parameters were not significantly different between treatments, nor were physiological indicators of fish stress (plasma cortisol, glucose, and triglycerides). On the other hand, lettuce growth (leaf and root weight and length) was up to three times higher in the treatment that received fertilizer. © 2022 by the authors. Licensee MDPI, Basel, Switzerland. info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 3.4 2022 WATER RESOURCES 38 / 103 = 0.369 2022 Q2 T2 ENVIRONMENTAL SCIENCES 135 / 275 = 0.491 2022 Q2 T2 0.723 2022 Geography, Planning and Development 2022 Q1 Aquatic Science 2022 Q1 Water Science and Technology 2022 Q2 Biochemistry 2022 Q2 5.5 2022 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Miranda-de la Lama, G. C. Universidad de Zaragoza (orcid)0000-0002-6848-1010 Escobar-Álvarez, R. Moratiel, R. 2008 700 Universidad de Zaragoza Dpto. Produc.Animal Cienc.Ali. Área Producción Animal 14, 6 (2022), 935 - [10 pp] Water (Basel) Water (Switzerland) 2073-4441 1035588 http://zaguan.unizar.es/record/117222/files/texto_completo.pdf Versión publicada 2823944 http://zaguan.unizar.es/record/117222/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:117222 articulos driver 2024-03-18-13:11:35 ARTICLE