Facultad de Ciencias Agropecuarias

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Los abonos verdes: alternativa orgánica y natural para la agricultura
(2007) Pasaca Pasaca, Hermel H.; Martín, Gloria
Aborto Bovino no Infeccioso
(2004) Dután Sanango, José Miguel; Samaniego Delgado, José Maria
Abundancia relativa y patrones de actividad de mamíferos medianos y grandes presentes dentro de un bosque seco tropical ecuatoriano
(Universidad de Cuenca, 2025-02-10) Alvarez Alvarez, Alan Fabricio; Estrella Bermeo, Carlos Adrián; Gallo Pérez, Abel Antonio
The study was carried out in the dry forest “Bajada de Chanduy”, located in the province of Santa Elena, Ecuador. The objective of the research was to determine the relative abundance, diversity and activity patterns of medium and large mammals through and large mammals by means of photo-trapping, using 9 Bushnell Prime 24 MP Low-Glow 24 MP Low-Glow cameras were used to monitor from May to August 2024, with an estimated effort of 882 days/trap. effort of 882 days/trap and 370 individual data. Twelve mammal species were recorded, belonging to 8 families and 5 different orders. The most represented orders were Carnivora (37.16%) and Artiodactyla (59.98%). The most abundant species were Dicotyles tajacu, Nasua nasua, and Odocoileus virginianus. The species with the lowest relative abundance index (RAI) was Galictis vittata. The analysis of activity patterns showed that most of the recorded species were diurnal, with activity peaks at 10:00 am, 08:00 am, and 04:00 pm. Among the diurnal species, Nasua nasua and Eira barbara stood out, while nocturnal species included Leopardus pardalis, Dasypus novemcinctus, and Tamandua mexicana. Cathemeral species, such as Dicotyles tajacu and Odocoileus virginianus, were also identified, showing activity during both day and night. The study also evaluated the relationship between activity patterns and lunar phases, without finding significant influence. The findings provide key information for developing measures to help preserve these ecosystems.
Acercamiento al conocimiento sobre la embriogenesis somatica y sus aplicaciones agricolas
(2005) Calle Gaón, Telmo Eduardo; Isidrón Pérez, Miriam
Actividad celular en la fijación y renovación de calcio oseo
(2008) Castro Meneses, María Verónica; Soria Parra, Carlos Alonso
Actividad fisiológica de valores hematemétricos en bovinos de la parroquias: Tarqui, Cumbe y Victoria del Portete
(2005) Calle Lara, Pablo Ignacio; Crespo Sarmiento, Remigio Antonio; Vidal Vidal, José Guillermo
Actividad Viral de Fiebre Aptosa en la Provincia de Morona Santiago
(2005) Sánchez, Juvenal; Vaca Vaca, Carlos Miguel
Actualización de la seroepidemiología de toxoplasma gondii en gatos de la ciudad de Cuenca
(2016) Bojorque Pazmiño, Marcia Priscila; Vallecillo Maza, Antonio Javier
Toxoplasmosis is a cosmopolitan disease which pathological agent is a protozoon kwon as toxoplasma gondii, responsible of a variety of clinic signology, morbility and mortality in the different animal species it infects. It is intimately related with the acquisition and possession of domestic cats, also considered synonymous of miscarriage and pregnancy difficulties in the pregnant woman, placing it under the scrutiny of public health programs. On 1994 in Cuenca city a study was made for the detection of antibodies against Toxoplasma gondii in felines, resulting in 44.5% of positive cats. Over time cats have became the ideal mascot due to their space, behavior and feeding characteristics. Even more for a population that is increasing every day and prefers because of its life style easy care animals. On the basis of the said before and on the significant development on the veterinarian professional area dedicated to minor species, we decide to carry out an investigative project which main objective is the actualization of data related to toxoplasma gondii and cats in the city. The lab test used for this investigation differs from the previous essay, blood samples obtained from cats where analyzed by indirect immunofluorescence method because of its specificity and sensitivity. Results found will allow us to have an updated vision of the serum prevalence of toxoplasmosis. Data obtain on this investigation are minor to the ones obtain two decades ago, due to the increase of awareness acquired on handling, feeding and hygiene by the owners of feline pets which is determining for the development of the disease, also a bigger influx to veterinary centers for before and after information of a recent acquisition or adoption of a cat.
Adaptación de 10 líneas promisorias de fréjol arbustivo (Phaseolus vulgaris L.) en Santa Isabel
(1999) González C., Raúl; Déleg Pacheco, Hernán
Adaptación de cuatro variedades de melón (cucumis melo L.) y sandía (citrullus vulgaris schrad), en el valle de Yunguilla
(1991) Astudillo Padilla, Gloria; Ortiz Rodas, Ximena; Santillán Santillán, Franklin
Adaptación de mezclas forrajeras de pasto tropical en el cantón Gualaquiza
(1989) Orellana P., Guido; Contreras Rivera, Jorge Eduardo
Adaptación de seis variedades de pimiento (Capsicum annuum L.) en el Valle de Yunguilla
(1995) Ramos Meneses, Mercy; Angamarca Molina, Oswaldo; Rivera Suárez, Florencio
Adaptación de siete híbridos de girasol (Helianthus annus L.) en el valle de Yunguilla
(1994) Astudillo Heredia, Luis Enrique; Arcos Rojas, Germán
Adición de suero de cobaya en celo a un medio de maduración in vitro
(Universidad de Cuenca, 2023-09-21) Quizhpi Bueno, Paul Geovanny; Zuña Ortuño, Domenica Yamara; Ayala Guanga, Luis Eduardo
The work was carried out in the Biotechnology laboratory of the Faculty of Agricultural Sciences of the University of Cuenca. The objective of this study was to evaluate the effect of different percentages of guinea pig serum in heat (SCC) as a supplement in an in vitro maturation medium (IVM) for guinea pig oocytes from slaughterhouse ovaries. For this, in the first instance, 10 crossbred guinea pigs were synchronized, the day they showed heat, blood serum was obtained. In the second instance, slaughterhouse ovaries were collected and COC's were obtained from these using the Slicing technique, these were classified into type A, B and C based on their morphology. Three treatments were evaluated: T0=control (base maturation medium), T1=base medium + 5% SCC supplementation, T2= base medium + 10% SCC supplementation, T3= base medium + 20% supplementation. % of SCC it was determined that the addition of SCC caused a greater degree of expansion of cumulus cells 5% (84.65 ± 3.98), 10% (84.49 ± 3.63) and 20% (87.43 ± 3.98) with respect to control (69.7 ± 3.63; p<0.005). The percentage of oocytes that reached metaphase II in T1 (25.91 ± 2.79), T2 (26.9 ± 2.79) and T3 (32.48 ± 3.06), were higher compared to the T0 (8.65 ± 2.79; p<0.05). In conclusion, the oocytes that were matured in medium supplemented with SCC presented a better percentage of morphological maturation than cumulus cells and oocytes that reached metaphase II.
Adición de vitamina E como antioxidante en cobayas gestantes (Cavia porcellus) sometidas a restricción alimentaria y su efecto sobre los parámetros productivos de la descendencia
(Universidad de Cuenca, 2022-02-15) Pillco Guzmán, Andrea Cecilia; Criollo Cajamarca, Maritza Gabriela; Pesántez Pacheco, José Luis
Prenatal viability is related to an adequate supply of nutrients and oxygen from the mother to the embryos and subsequently to the fetuses, determined by an adequate placental structural and functional development. Therefore, an insufficient placental development due to undernourishment and/or maternal hypoxia, causes an increase in oxidative stress in the mother that exceed the endogenous antioxidant capacity, causing cell damage, which are related to a lower fetal development, low birth weight, stunting and a higher perinatal and post-natal mortality rate. The pregnant guinea pigs were divided into three groups ad libitum with 100% of the daily requirements (Group C; with restriction of 50% of the daily requirements without vitamin E supply (SNV group) and with restriction and treated with vitamin E (CNV group). The guinea pigs born to mothers of the CNV group had a higher weight during the whole lactation period and continued to be higher after weaning, likewise, the body length was longer during these two periods (lactation and weaning) compared with the SNV group. A better body mass index was also observed in the CNV group guinea pigs towards the middle of the lactation period and after weaning compared to the SNV group; all these morphometric characteristics reflected that the CNV group’s guinea pigs had a better daily mean weight gain and a better total weight gain during the juvenile development of the pups, compared to the restricted group without vitamin (SNV). In conclusion, the addition of vitamin E provides a positive effect on pregnant guinea pigs and could counteract the negative effects caused by dietary restriction on offspring.
Adición del líquido folicular como suplemento al medio de maduración in vitro de ovocitos de cobaya provenientes de ovarios de matadero
(Universidad de Cuenca, 2023-06-26) Aguinsaca Yauri, Nidia Nataly; Motoche Castro, Mishel Stefanía; Ayala Guanga, Luis Eduardo
In recent years, the in vitro maturation (IVM) process of guinea pig oocytes has been trying to improve. However, the results obtained until now are contradictory. Therefore, the present study sought to validate a protocol for obtaining follicular fluid (FL) from guinea pigs in estrus and then, to evaluate the effect of supplementing it in different percentages in a conventional medium in vitro maturation of guinea pig oocytes. For the first experiment, ten mestizo guinea pigs were used, which received a heat synchronization protocol based on oral progesterone for 15 consecutive days as a result 200µl of LF was obtained. In the second experiment, cumulus oocyte complexes (COC´s) were obtained from guinea pig ovaries using the slicing technique. The COC´s were distributed randomly in four IVM media containing different percentages of FL (T0= control, T1= 5%, T2= 10%, and T3 = 20%). After 24 hours, greater expansion of cumulus cells (CC) was observed in T1 (68.1 ± 3.01%) and T3 (66.6 ± 3.39%). It compared to T2 (54.35 ± 2 .72%) and T0 (43.19 ± 2.43%) with p<0.05, between groups. In addition, when evaluating the restart of meiosis progression, it was observed that the oocytes from T3 (33.46 ± 2.4%) and T2 (31.06% ± 1.93%) presented a higher percentage of oocytes in metaphase II, without a statistical difference between these two treatments; compared to the oocytes from T1 (24.52 ± 2.13%) and T0 (14.07 ± 1.72%). In brief, the supplementation of 10% guinea pig the follicular fluid in a conventional maturation medium resulted in a higher percentage of cumulus expansion, it improves the percentage of oocytes that reach metaphase II.
Administración de fincas integrales
(2007) Montesdeoca Dumas, Diego; Ortega Vilela, Jose Enrique;
Administración de progesterona de acción prolongada después de la fertilización en ovinos superovulados y su relación con el tamaño de cuerpos lúteos y embriones
(2016) González Rosales, Mariana Gabriela; Quezada Moscoso, Sofía Margarita; Perea Ganchou, Fernando Pedro; Galarza Lucero, Diego Andrés
The effect of short- and long-acting progesterone (P4) in early ovine metaestrous upon the size and number of corpus luteum (CL), progesterone and cortisol concentration, and number of embryos recovery at days 7 and 13 post-artificial insemination (AI) were analyzed. The study was carried out in Irquis livestock farm owned by University of Cuenca with 21 Correidale ewes, which were submitted to estrous synchronization with P4 intravaginal devices and ovary stimulation with equine chorionic gonadotropin (Folligon ®) and follicle-stimulating hormone (Folltropin ®). After estrus, ewes were inseminated and randomized assigned to one of the following treatments: (T1; n=7) control; (T2; n=7) 6 mg of P4 (Progestar ®) on days 2, 3 y 4 post-IA, and (T3; n=7) 18 mg of long-acting P4 (Progesterone MAD-4 ®) on day 2 post-IA. Fecal P4 and cortisol were also assessed on days 2, 3, 4 and 5 post-AI. The size and number of the CL and embryos were performed by mid-ventral laparotomy on days 7 and 13; and also blood samples for P4 concentration determination were collected on day 13. A randomized block design was used to analysis of data. No statistics differences between treatments were found. Also, no embryos were recovered in any experimental group. In conclusion, the short- and long-acting P4 applied in early metaestrous did not affect the size and number of CL, serum P4 concentration, also, did not affect the concentration of P4 and cortisol in feces.
Agricultura orgánica como alternativa a la agricultura industrial
(2007) Lata Peralta, Luis; Cruz La Paz, Orestes
La agroecología y el cambio de matriz productiva agraria en el Ecuador: el caso de la producción de maíz en la provincia de Loja
(2019) Torres Orellana, María Eugenia; Minga Ochoa, Nancy Marlene
In Ecuador there are two matrices productive for the agrarian field, which are disputed more clearly in the peasantry, the conventional and Agroecological Agriculture; In 2013 with the promulgation of Change of the Productive Matrix was officially initiated the intensification of capitalism in the countryside in the name of rural modernization; So it was necessary with this research to investigate the results of agroecology and public policy in terms of sustainability, this involves criteria of identity and satisfaction on the part of farmers. Due to the complexity of the research, a case study was taken as reference in the analysis of the agroecosystems, the crops of hard corn as a product of link and dispute with the capital; In addition, the methodological tools were adopted: Economic-Ecological Evaluation of Agroecosystems (AS-TPA, 2015); the integrated multi-scale analysis of the metabolism of society and ecosystems MuSIASEM (Giampietro, Mayumi, & Ramos); in-depth interviews; and action research as a cross-cutting practice. It was observed with this from the local level, that the conventional matrix supported by the State consolidates bases for the development of the agroindustry, assembling an apparent territorial progress; Their ecological and cultural profit and aggression; While agroecology promotes the organization and sustainability of the territory under unfavorable conditions

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