[1]
;
Daniel Martínez Gómez
[1]
;
Norma Angélica López Téllez
[3]
;
Juan José Vargas Magaña
[2]
;
Javier Ventura Cordero
[2]
;
Francisco Méndez Ortíz
[2]
México
México
Este estudio determinó el efecto de la oxitetraciclina sobre la circulación de amoníaco (NH3+), amonio (NH4+), nitrito (NO₂⁻), nitrato (NO3⁻) y el crecimiento de tilapia (Oreochromis niloticus)en un sistema de recirculación acuapónica, durante un período de 13 semanas. Cada tratamiento consistió en tres unidades acuapónicascon tanques de cría de 100 L de capacidad, con 7peces cada uno, una bobina hidropónica y un flujo laminar continuo. La circulacióndeamoníaco (NH3+), amonio (NH4+), nitrito (NO₂⁻) y nitrato (NO3⁻) se midió a la entrada y salida de cada subsistema de filtración. En el tratamiento 1 (T1), se proporcionópolvo soluble de oxitetraciclina (400 mg/kg de biomasa), mezclado con el alimento. En el tratamiento 2 (T2) se suministró una alimentación libre de oxitetraciclina. El peso de los peces y el flujo de nutrientes fue analizadomediante la prueba t. Al final del experimento, no se detectarondiferencias estadísticas en el peso dela tilapia [T1 (14.01 g) vs. T2 (13.71 g); P>0.05]. El flujo iónico permanecióconstante(P>0.05) y no tóxico en ambos tratamientos. El uso de oxitetraciclinaaparentemente no comprometió el paquete bacteriológico nitrificante en los biofiltros.Palabras clave:amonio, nitrito, nitrato, antibiótico, bacterias.ABSTRACTThis study determined the effect of oxytetracycline on the circulation of ammonia (NH3+), ammonium (NH4+), nitrite (NO₂⁻), nitrate (NO3⁻) and the growth of tilapia (Oreochromis niloticus) in an aquaponic recirculation system, over a period of 13 weeks.Each treatment consisted of three aquaponic units with 100 L capacity rearing tanks, with seven fish each, a hydroponic coil and continuous laminar flow. The circulation of ammonia (NH3+), ammonium (NH4+), nitrite (NO₂⁻) and nitrate (NO3⁻), was measured at the inlet and outlet of each filtration subsystem. In treatment 1 (T1), soluble oxytetracycline powder (400 mg/kg of biomass)was provided with the feed. In treatment 2 (T2) an oxytetracycline-free diet was provided. Fish weight and nutrient flow were analyzedusing the t-test. At the end of the experiment, we detected no statistical differences in tilapiaweight [T1 (14.01 g) vs. T2 (13.71 g); P > 0.05]. The ionic flux remained
his study determined the effect of oxytetracycline on the circulation of ammonia (NH3+), ammonium (NH4+), nitrite (NO₂⁻), nitrate (NO3⁻) and the growth of tilapia (Oreochromis niloticus) in an aquaponic recirculation system, over a period of 13 weeks.Each treatment consisted of three aquaponic units with 100 L capacity rearing tanks, with seven fish each, a hydroponic coil and continuous laminar flow. The circulation of ammonia (NH3+), ammonium (NH4+), nitrite (NO₂⁻) and nitrate (NO3⁻), was measured at the inlet and outlet of each filtration subsystem. In treatment 1 (T1), soluble oxytetracycline powder (400 mg/kg of biomass)was provided with the feed. In treatment 2 (T2) an oxytetracycline-free diet was provided. Fish weight and nutrient flow were analyzedusing the t-test. At the end of the experiment, we detected no statistical differences in tilapiaweight [T1 (14.01 g) vs. T2 (13.71 g); P > 0.05]. The ionic flux remained constant (P> 0.05) and non-toxic in both treatments. The use of oxytetracyclineapparently did not compromise the nitrifying bacteriological package in the biofilters.
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