Tesis Medicina Veterinaria

Permanent URI for this collectionhttp://repositorio.uta.edu.ec/handle/123456789/36415

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    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 Gonzalo
    The 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.
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    Evaluación del efecto de la semilla de linaza (Linum usitatissimum) sobre los niveles de testosterona y parámetros productivos en conejos mestizos (Oryctolagus cuniculus) durante la fase de engorde
    (2024-08) Sánchez Díaz, Leonela Mileidy; Aragadvay Yungan, Ramon Gonzalo
    This study investigated the effect of including flaxseed (Linum usitatissimum) in diets of rabbits during the fattening phase, evaluating testosterone levels and productive parameters. Four treatments were used: T0 as control, and T1, T2, and T3 with additions of flaxseed at 3%, 6%, and 9%, respectively, all supplemented with alfalfa. Treatments (T0, T1, T2, and T3) were assigned using a randomized block design. The research was conducted over 30 days. Significant differences were observed, such as in the final weight of the rabbits, which was higher in T2 (2235.11 g) and T3 (2239.89 g) compared to T0 (1822.11 g) and T1 (2030.56 g). Food consumption varied significantly between treatments, with higher values in T2 (2187.88 g) and T3 (2282.68 g). Daily weight gain was highest in T3 (33.42 g/day), followed by T2, suggesting a potential positive effect of flaxseed on feed efficiency. There were no significant differences in feed conversion (P = 0.2583), indicating that efficiency was not affected by flaxseed addition. Mortality was low in all groups (1.23% in T0 and T1; no mortality in T2 and T3). Testosterone levels showed numerical increases with flaxseed supplementation, though without significant statistical differences. The study also evaluated carcass quality and internal organs, highlighting potential beneficial effects of flaxseed on basal metabolism and overall rabbit health.
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    Evaluación de la actividad antimicrobiana del aceite esencial microencapsulado de Hierba Luisa (Cymbopogon citratus) sobre bacterias Gram positivas aisladas de piel de conejo (Oryctolagus cuniculus)
    (2024-02) Jaramillo Panimboza, Katherine Salomé; Cruz Quintana, Sandra Margarita
    The objective of the research was to evaluate the antimicrobial activity of the microencapsulated essential oil of Lemongrass (Cymbopogon citratus) on Grampositive bacteria isolated from rabbit skin (Oryctolagus cuniculus), two Gram-positive bacteria (Paenibacillus profundus and Staphylococcus succinus) were molecularly identified using a 16s marker, the agar diffusion method in wells to measure antimicrobial activity, determined that the two bacterial strains did not form halos of inhibition, the minimum inhibitory concentration (MIC) in liquid medium was determined at 5% for the P. profundus strain with an optical density of 0.251, with respect to the S. succinus strain it was established that at 25% concentration of the oil there was bacterial growth at an optical density of 0.487, the colony forming units (CFU) for the S. succinus strain were determined at 15% of the oil concentration, with an average range of 2.00 CFU, being the best treatment, while for the P. profundus bacteria it was established from 15%, 20% and 25%, as it does not exist in any of them. the growth of UFC.
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    Efecto de la eCG en tratamientos super ovulatorios subsecuentes, sobre la fertilidad en la coneja y la viabilidad en los gazapos
    (2023-09) Saigua Caicedo, Fernando David; Aragadvay Yungán, Ramón Gonzalo
    Nowadays, the use of exogenous hormones is an increasingly preferred alternative by producers of all farm species, where through it they manage to obtain a greater number of benefits, versus using traditional production methods. In this investigation, the effect and use of equine Chorionic Gonadotropin (eCG) in superovulatory treatments was verified, on established parameters: such as fertility, through follicular and oocyte quality, serum E2 levels and receptivity to the male, in addition to measuring the viability of the rabbits resulting from this protocol through the number of pups per birth, mortality rate and daily weight gain. For this investigation, 27 large hybrid breed multiparous rabbits were considered, and 4 fertile male rabbits, which were treated under the same environmental and nutritional standard, the females were randomly distributed, in a random design, with three completely different treatments ( 9 females per treatment) and each treatment was repeated twice. The treatments consisted of: T0 (control 25UI for synchronization), T1 (medium dose 50UI for superovulation) and T2 (high dose 100UI for superovulation) these doses were administered intramuscularly. The use of eCG for superovulatory treatments in rabbits resulted in an increase in receptivity, ovulation rate and follicular growth, however, it was shown to show no differences in weight gain and number of pups per birth.