Tesis Medicina Veterinaria y Zootecnia

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    Evaluación del aceite de palma y premezcla gluconeogénica sobre el comportamiento productivo en cerdas primíparas
    (2024-08) Almeida Enríquez, Catherine Belén; Guerrero López, Jorge Ricardo
    The aim of this study was to evaluate the effects of palm oil and a gluconeogenic premix on the productive performance of primiparous sows. The research took place on the premises of the pig producer "Martita" located in the parish of Checa, canton Quito, and province of Pichincha. The study included 10 nulliparous Landrace x Yorkshire crossbred sows with an average weight of 80 kg +/- 10 kg in which two treatments were tested: T0 = 0% energy replacement (kcal) provided by palm oil, with a gluconeogenic premix and T1 = 100% energy replacement (kcal) provided by palm oil, with a gluconeogenic premix. For each treatment, five repetitions were used per treatment, integrating one sow per repetition. In the comparison of means, the T Student statistical test was used with a confidence level of 95%. The variables analyzed in this study included backfat thickness, feed intake during gestation and lactation, weight gain, piglet weight at birth and weaning, litter size, pre-weaning mortality, weaning-oestrus interval, pregnancy rate and partial costs. The results reported that replacing 100% of the energy provided by palm oil with a gluconeogenic premix significantly impacted cumulative feed intake especially during the last weeks of gestation and at the beginning of the lactation stage. However, it did not significantly affect the average daily feed intake in the two stages. Similarly, T1 considerably reduced backfat thickness during these periods. On the other hand, significant differences were observed in the weight of piglets from sows fed with the gluconeogenic premix, during birth and weaning, being these higher compared to the control group. In addition, the pre-weaning mortality rate was significantly lower in the T1 group. Finally, in the cost analysis, although the total cost was slightly higher for the T1 group due to the higher intake, it should be stressed that the improved results, such as piglet weight and reduced pre-weaning mortality, indicate that the benefits could justify the additional expense.
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    Evaluación del aceite residual de comida rápida sobre los índices productivos en pollos de engorde
    (2023-09) Sailema Criollo, Bryan Andrés; Guerrero López, Jorge Ricardo
    The objective of this study was to analyze different percentages of addition of residual oil in diets of broilers, being evaluated 1.5%, 2% and 2.5%, and their effects on production indices and cost/benefit ratio. of the different treatments. Four different treatments were studied, including a control with 0% residual oil, for the present work a completely random statistical design was carried out, which consists of five repetitions for each treatment applied, which presented 10 experimental units adding a total of 200 chickens. The analysis of the means was carried out using Tukey's statistical test at 95% reliability. It was divided into three stages of productive period, initial (0-7 days), growth (8-21 days), and fattening (22-35 days and 36-42 days). It was concluded that in the different stages there were no significant differences between treatments in terms of productive performance, however, in an accumulated analysis differences were obtained in terms of final weight and European efficiency index, being the most viable treatment T1 with the addition of 1,5 % of residual oil, presenting a good productive performance and a cost/benefit ratio of 1.19 points.