The objective of this research was to evaluate the effect of Saccharomyses cerevisiae supplementation on digestive health and zootechnical parameters in postlarvae of red tilapia Oreochromis sp in the reversion phase, in a culture system with low water turnover, in San Jerónimo (Antioquia, Colombia). The trial was carried out for four weeks. Nine fiberglass channels (three repetitions) were used for a Control group (T1) and two probiotic treatments (T2: 16 g/kg feed = 16%) and (T3: 31 g/kg feed = 31%). The physicochemical characteristics of the water were analysed and zootechnical data were taken from the post-larva. Intestinal health was evaluated by histopathology. The results indicated that the physicochemical parameters of the water were similar between treatments and were within the acceptable range for the hybrid (average oxygen 9.1±0.4 mg/l, temperature 27.6±0.1 °C, constant p...

The objective of this research was to evaluate the effect of Saccharomyses cerevisiae supplementation on digestive health and zootechnical parameters in postlarvae of red tilapia Oreochromis sp in the reversion phase, in a culture system with low water turnover, in San Jerónimo (Antioquia, Colombia). The trial was carried out for four weeks. Nine fiberglass channels (three repetitions) were used for a Control group (T1) and two probiotic treatments (T2: 16 g/kg feed = 16%) and (T3: 31 g/kg feed = 31%). The physicochemical characteristics of the water were analysed and zootechnical data were taken from the post-larva. Intestinal health was evaluated by histopathology. The results indicated that the physicochemical parameters of the water were similar between treatments and were within the acceptable range for the hybrid (average oxygen 9.1±0.4 mg/l, temperature 27.6±0.1 °C, constant p...

Parasites are one of the biggest problems affecting fish health, Trichodina sp being the most common in the early life stages of the red tilapia Oreochromis sp. The objective of this study was to evaluate the efficacy of pharmacological and homeopathic substances in the control of Trichodina sp in red tilapia larvae at the Centro Experimental Piscícola (Antioquia, Colombia). In total, 300 red tilapia larvae in the reversion phase (80 observations/larva) were used and distributed in 15 aquariums, each with an effective volume of 63 L. At 0 and 48 hours, two homeopathic substances were applied (garlic [Allium sativum] and ginger [Zingiber officinale], 5 mg/L each) and two pharmacological substances (metronidazole and albendazole, 10 mg/L each) and a control group. The larvae were sedated and the number of Trichodina sp was counted at 0, 48 and 72 h using an optical microscope (4X objectiv...

Como contribución al adecuado manejo del agua en producciones piscícolas con enfoque sostenible, se planteó evaluar los parámetros zootécnicos de tilapia roja Oreochromis sp, en cuatro densidades y aireación constante bajo invernadero, en el municipio de Sopetrán (Antioquia - Colombia). 1 830 alevinos fueron utilizados durante un ciclo productivo así: Densidad 1: 182 alevinos (25 kg/m3), Densidad 2: 366 alevinos (50 kg/m3), Densidad 3: 550 alevinos (75 kg/m3) y Densidad 4: 732 alevinos (100 kg/m3). Los peces fueron observados y alimentados durante 180 días, según su fase productiva. Los datos de peso y talla fueron registrados en el aplicativo ExcelMicrosoft y procesados, para el cumplimiento de supuestos, y obtención de la estadística descriptiva y comparación entre densidades mediante la prueba de Tukey, con el programa estadístico PAST®. Los resultados mostraron que, el...