Tesis Medicina Veterinaria
Permanent URI for this collectionhttp://repositorio.uta.edu.ec/handle/123456789/36415
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Item Efecto del Rhodobacter Sphaeroides sobre los índices productivos y digestibilidad aparente en pollos de engorde(2025-02) Maliza Pacha Nelly Elizabeth; Guerrero López Jorge RicardoThe objective of this study was to evaluate the addition of Rhodobacter Sphaeroides in different doses on the productive índices and the apparent digestibility of nutrients. For this purpose, four treatments werw used; T0 control group without the addition of R. Shpaeroides; 1 ml of R. Shpaeroides; T2 with 2 ml of R. Shpaeroides and T3 with 3 ml of R. Shpaeroides per liter of wáter. For the study, 200 one- day- old male and female broiler chickens of the Cobb 500 line were used. Through a completely randomized design with 10 repetitions per treatment and 5 animals per repetition. The data obtained were evaluated with the Infostat statistical program using the Tukey test with a significance leve lof 95 %. The productive period was divided into four stages: initial (0- 10 days); growth (11- 22 days); finisher I (23- 42 days) and finisher II (43- final), while the evaluation of the apparent digestibility of nutrients was carried out in a periodo f 35- 42 days of age. Regarding the results, T3 presented better result in terms of final weight (3052.29 g); weight gain (3012.61 g) and European Efficiency Index (318.72), while feed consumption (g) anda feed conversión index did not present significant differences (P< 0.05). Regarding the apparent digestibility of nutrients, there were no major significant differences (P> 0.05).Item Evaluación de la preferencia de consumo y digestibilidad aparente de forrajes en conejos (Oryctolagus cunículus) de la raza californiana(2025-02) Chasi Chango Pamela Lizbeth; Aragadvay Yungan Ramon GonzaloThe purpose of this research was to evaluate the consumption preference and digestibility in rabbits with different forages as a food alternative for them, thus employing five treatments through a completely randomized design completing a 32- day study. The treatments Avena sativa (T1), Lolium perenne (T2), Medicago sativa (T3), Zea mays (T4) and Malva sylvestris (T5) presented significant differences in the various parameters studied, thus determining that when assessing consumption preference, T1 (2386g) and T3 (2513g) statistically registered the best values compared to T5 (885g), which was the treatment with a lower total consumption during the experimental period, which would determine a better palatability in the treatments with higher consumption. Likewise, in productive parameters such as weight gain, it was noted that the T3 (1027.33g) and T1 (944.67g) treatments stood out, which presented a better weight gain unlike T2 (555.67g), which registered the lowest productive values of the research. At the same time, it was determined that forages such as T1 and T3 presented a better digestibility in dry matter (63.9%) and (59.7%) respectively, organic matter (63.8%) and (48.8%) as they presented a lower content of non-digestible fiber (FDA), which indicates that being a species that practices cecotrophy presents a better use of nutrients, which did not happen with T5, which presented a lower digestibility of nutrients in DM, MO, NDF and FDA which would be aligned with the limited efficiency of this forage and the presence of secondary compounds that also affect the consumption of these forages. This is how he highlights the importance of the implementation of highly palatable forages that also provide the necessary nutrients in the species in order to obtain positive productive parameters together with good digestibility.