52 research outputs found
Effect of oscillating time of feeding and oscillating diet formulation on performance and carcass characteristics in feedlot steers
No full textSmaller farms often lack the control over feeding and weighing that commercial feedlots possess. The objectives of this study were to evaluate the effect of oscillating feeding time and oscillating diet formulation on growth performance and carcass characteristics in feedlot cattle fed dry, whole shelled corn–based diets. A total of 168 steers were blocked by initial BW (280 ± 8.7 kg) and allotted to 24 pens. Pens were assigned to 1 of 3 treatments: (1) control, fed the same diet and at the same time each day; (2) oscillating feeding time, fed the same diet as control fed 1 h earlier on odd days and 1 h later on even days of the experiment; and (3) oscillating diet formulation, fed the diet at the same time every day but with diet formulation changed daily (10% distillers dried grains with solubles was added on the even days and 10% removed on the odd days). Animal performance (BW, DMI, and G:F) was measured over 166 to 174 d. At the end of the experiment, steers were weighed and slaughtered, and carcass characteristics were evaluated. Data were statistically analyzed (PROC Mixed, SAS) using treatment as a fixed variable and pen and block as random variables. There was no treatment effect (P > 0.05) for any variable. In conclusion, small daily diet formulation or feed delivery timing variations did not affect performance and carcass characteristics when whole shelled corn was fed to feedlot cattle.Fil: Relling, Alejandro Enrique. Ohio State University; Estados Unidos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - CONICET - La Plata. Instituto de Genética Veterinaria Ing. Fernando Noel Dulout; ArgentinaFil: Lowe, Gary. Ohio State University; Estados UnidosFil: Fluharty, Francis L.. Ohio State University; Estados Unido
Effect of fish oil and vitamin E on sperm lipid peroxidation in dogs
No full textThe objective was to evaluate the effects of dietary fish oil (FO) and vitamin E (VE) supplementation on sperm sensitivity to lipid peroxidation (LP) in dogs. Using an incomplete replicate 3 × 3 Latin square design, five dogs were allocated into three groups. One of the squares was incomplete and had two dogs that were used with three treatments. The dogs were assigned to three different treatments, fed a control diet of balanced commercial food (controlgroup; CG), control diet supplemented with 54 mg FO/kg body weight 0·75 per day (FO group; FG) and FO plus 400 mg VE per day (FO and VE group; FEG) for 60 d. Semen samples were collected on days 0 and 60 and divided into two halves, peroxidised and control, with or without ascorbate?Fe2+, respectively. LP was measured in both halves by chemiluminescence as counts per min/mg protein. Fatty acid profile was determined by GC. Data were analysed using the mixed procedure (SAS). On day 0, LP increased in all groups in the peroxidised samples (P 0·1). Additionally, on day 60 total n-3 was higher in the FG and FEG compared with the CG (P < 0·05). Supplementation with FO alone or together with VE decreased LP in peroxidised samples. These results could indicate a protective effect of n-3 on sperm. More studies are needed to understand the mechanism whereby FO and/or FO plus VE decrease LP in dogs? sperm.Fil: Risso, Analia Lorena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET- La Plata. Instituto de Genética Veterinaria "Ing. Fernando Noel Dulout". Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Instituto de Genética Veterinaria; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias; ArgentinaFil: Pellegrino, Francisco Javier. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias; ArgentinaFil: Corrada, Yanina Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias; ArgentinaFil: Marmunti, Mónica Edith. Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias; ArgentinaFil: Gavazza, Mariana Beatriz. Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias; ArgentinaFil: Palacios, Alejandro. Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias; ArgentinaFil: Relling, Alejandro Enrique. Ohio State University; Estados Unido
Prepartum fatty acid supplementation in sheep. II. Supplementation of eicosapentaenoic acid and docosahexaenoic acid during late gestation alters the fatty acid profile of plasma, colostrum, milk and adipose tissue, and increases lipogenic gene expression of adipose tissue
No full textThe objectives of this study were as follows: 1) to establish whether feeding a source of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) to ewes during late gestation changes the fatty acid profile of colostrum, milk, ewe adipose tissue, and plasma and subsequently lamb plasma and red blood cells (RBC), and 2) to investigate the effects of EPA and DHA on mRNA expression in ewe adipose tissue. Eighty-four gestating ewes (28 pens, three per pen) were blocked by lambing day and assigned to a diet with an addition of fat at 0.39% of the DM during the last 50 d of gestation using Ca salts of a palm fatty acid distillate (PFAD) high in palmitic and oleic acids or EPA + DHA. Blood samples were taken from ewes on days 20, 1 (parturition), and 30 and from lambs on days 1 and 30 for plasma fatty acid analysis. Fatty analysis of lamb RBC was performed on day 1. Colostrum samples were taken at lambing and milk samples on day 30 for fatty acid analysis. Subcutaneous adipose tissue biopsies were taken from one ewe per pen on day 20 for fatty acid analysis and gene expression analysis of 27 genes. Treatment × day interactions (P 0.10). Concentrations of fatty acids with 6 to 10 carbons were significantly increased (P 0.10). The expression of fatty acid synthase and leptin was significantly increased (P < 0.05), whereas the expression of diacylglycerol acyltransferase 2 tended to be increased (P = 0.08) by supplementation of EPA + DHA vs. PFAD. These results suggest that supplementation with EPA and DHA to ewes during late gestation alters the fatty acid profile of plasma, colostrum, and milk and may increase lipogenesis.Fil: Coleman, Danielle Nicole. The Ohio State University, Ohio Agricultural Research and Development, Department of Animal Sciences; Estados UnidosFil: Murphy, Kevin D.. Virtus Nutrition LLC, Corcoran; Estados UnidosFil: Relling, Alejandro Enrique. The Ohio State University, Ohio Agricultural Research and Development, Department of Animal Sciences; Estados Unidos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET- La Plata. Instituto de Genética Veterinaria "Ing. Fernando Noel Dulout". Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Instituto de Genética Veterinaria; Argentina. Virtus Nutrition LLC, Corcoran; Estados Unido
Prepartum fatty acid supplementation in sheep I. Eicosapentaenoic and docosahexaenoic acid supplementation do not modify ewe and lamb metabolic status and performance through weaning
No full textFatty acids are involved in the regulation of many physiological pathways, including those involved in gene expression and energy metabolism. Through effects on these pathways, fatty acids may have lifelong impacts on offspring development and metabolism via maternal supplementation. Therefore, our objective was to investigate the impact of supplementing a source of omega-3 fatty acids eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) during late gestation on productive and metabolic responses of ewes and their offspring. Eighty-four gestating ewes (28 pens) were blocked and randomly assigned to a diet with 0.39% added fat during the last 50 d of gestation (d −0). The fat sources were Ca salts of a palmitic fatty acid distillate (PFAD) or EPA + DHA. After lambing (d 1), all ewes and lambs were placed on the same pasture. The ewes were weighed and BCS was measured on d −50, −20, 30, and 60 (weaning) of the experiment. Blood samples were taken from the ewes on d −50, −20, 1 (lambing), 30, and 60. Milk yield and composition were measured at 30 d postpartum. Lambs were weighed and bled at d 1, 30, and 60, and ADG was calculated. All plasma samples were analyzed for glucose and NEFA. Ghrelin, prostaglandin E metabolites (PGEM), and the prostaglandin D2 metabolite 11β-PGF2α were measured in d −20 ewe samples. Insulin and adropin were measured in lamb samples at d 60. There was no difference on ewe BW (P = 0.48) or BCS (P = 0.55), or plasma concentrations of glucose (P = 0.57), NEFA (P = 0.44), ghrelin (P = 0.36), PGEM (P = 0.32), and 11β-PGF2α (P = 0.86) between ewes supplemented with PFAD or EPA + DHA. Neither milk yield nor its composition was different (P > 0.10) among treatments. Lambs born from ewes supplemented with PFAD or EPA + DHA did not have different BW (P = 0.22), ADG (P = 0.21) or plasma NEFA (P = 0.52), glucose (P = 0.50), insulin (P = 0.59), and adropin (P = 0.72) concentrations. These results suggest that supplementation of EPA and DHA during late gestation did not affect ewe metabolic profile or milk production. Lamb performance and metabolism through weaning were not affected by maternal supplementation with an enriched source of EPA and DHA.Fil: Coleman, D. N.. The Ohio State University, Ohio Agricultural Research and Development Center (OARDC), Department of Animal Sciences; Estados UnidosFil: Rivera Acevedo, K. C.. University Of Puerto Rico-mayaguez; Puerto RicoFil: Relling, Alejandro Enrique. The Ohio State University, Ohio Agricultural Research and Development Center (OARDC), Department of Animal Sciences; Estados Unidos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET- La Plata. Instituto de Genética Veterinaria "Ing. Fernando Noel Dulout". Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Instituto de Genética Veterinaria; Argentin
Comparative sequence analysis and adipose-specific expression of G0S2 and ATGL in sheep
No full textLipolysis is a catabolic reaction that is mediated by adipose triglyceride lipase (ATGL) and its inhibitor such as G0/G1 switch gene 2 (G0S2) protein during the first step of hydrolysis. The hydrophobic domain of G0S2 protein interacts and binds to the patatin-like domain in ATGL. Although conservation of the hydrophobic domain has been reported across species, sheep G0S2 amino acids and its hydrophobic domain have not been sequenced and studied. In this study, the hydrophobic region of G0S2 which plays an important role in inhibition of ATGL-mediated lipolysis was highly conserved as shown in other species. Phylogenetic analysis revealed that ruminant G0S2 proteins showed greater homologies within the ruminant species compared to other mammalian species. Moreover, adipose-specific expression of G0S2 for sheep was observed. Together with an abundant expression of ATGL protein in adipose tissue of sheep, G0S2 protein may play a critical role in inhibiting ATGL-mediated triacylglycerol (TAG) hydrolysis in the adipose tissue.Fil: Ahn, Jinsoo. Ohio University; Estados UnidosFil: Wu, Huiguang. Ohio University; Estados Unidos. Inner Mongolia University for Nationalities; ChinaFil: Suh, Yeunsu. Ohio University; Estados UnidosFil: Carranza Martin, Ana Cristina. Ohio University; Estados Unidos. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Relling, Alejandro Enrique. Ohio University; Estados Unidos. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Shin, Sangsu. Kyungpook National University; Corea del SurFil: Lee, Sang Suk. Ohio University; Estados Unidos. Sunchon National University; Corea del SurFil: Lee, Kichoon. Ohio University; Estados Unido
Nutrición mineral y vitamínica de bovinos
No full textEl presente trabajo brinda información elemental para estudiantes y profesionales que deben comprender y ajustar la nutrición mineral y vitamínica en los sistemas productivos de bovinos más importantes de Argentina. No se trata de una exhaustiva revisión de la totalidad de los minerales y vitaminas existentes, por el contrario busca ser breve y acotada a los tópicos que se repiten como consultas desde el medio. Por esta razón, sólo incluye como macroelementos al calcio, fósforo, magnesio, cloro y sodio, dejando al potasio y al azufre dentro de otros capítulos en los que adquiere un rol práctico. Abordará entre los microelementos al cobre, zinc, selenio, manganeso, cromo e yodo. Las vitaminas serán abordadas en los aspectos que los autores consideran básicos para las A, D y E liposolubles, agregándose algunos aspectos del complejo B. Esta obra apoyará las tareas docentes de grado y de posgrado realizada por el grupo de trabajo del Laboratorio de Nutrición Mineral de la Facultad de Ciencias Veterinarias de la Universidad Nacional de La Plata.Fil: Fazzio, Luis Emilio. Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Departamento de Ciencias Básicas. Departamento de Producción Animal; ArgentinaFil: Mattioli, Guillermo Alberto. Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Departamento de Ciencias Básicas. Departamento de Producción Animal; ArgentinaFil: Picco, Sebastian Julio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET- La Plata. Instituto de Genética Veterinaria "Ing. Fernando Noel Dulout". Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Instituto de Genética Veterinaria; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Departamento de Ciencias Básicas. Departamento de Producción Animal; ArgentinaFil: Relling, Alejandro Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET- La Plata. Instituto de Genética Veterinaria "Ing. Fernando Noel Dulout". Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Instituto de Genética Veterinaria; ArgentinaFil: Rosa, Diana Esther. Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Departamento de Ciencias Básicas. Departamento de Producción Animal; Argentin
Efectos de la implementación de un programa de crecimiento acelerado en un sistema de crianza artificial comercial, convencional en terneros de sistemas lecheros
No full textDesde hace ya muchos años, los tambos de Argentina y el mundo fueron cambiando su estructura productiva, siempre buscando ser más eficientes y rentables, pero esto no siempre resultó así y aún hoy se sigue en la búsqueda y corrección de las metodologías utilizadas con la finalidad diaria de mejorar cada uno de los procesos que componen la estructura productiva y económica de los establecimientos. La cadena productiva, comienza con una etapa que ha sufrido muchos cambios y que aún hoy es motivo de controversia y discusiones para tratar de mejorarla. Por un lado la vaca produciendo leche e iniciando su nueva vida productiva y reproductiva con la finalidad de nuevamente poder cumplir con dos objetivos fundamentales: producir la máxima cantidad de leche conservando su salud y eficiencia reproductiva.
Sin embargo, por otro lado queda como producto inmediato el nacimiento de una concepta (un ternero/a) que sufrió los mayores cambios, justamente con la búsqueda de la eficiencia citada en el párrafo anterior. Pasó de una crianza natural al pie de su madre con el cuidado natural, consumo libre de alimentos y sin el estrés que significa el destete temprano, a un sistema totalmente diferente, que aún ahora no está definido en cuanto al manejo y alimentación tal que se evite el estrés del destete, optimizando su crecimiento.
No por casualidad pasó a llamarse "Crianza Artificial", sin que este nombre asegure que sea mejor que una "Crianza Natural". Efectivamente fue y es necesario una constante variación y estudio para encontrar la forma más ajustada y parecida a la "Crianza Natural". Si bien durante muchos años, se utilizaron distintas formas de alimentar a estos terneros, buscando precisamente optimizar la entrega diaria de leche, restringiendo la alimentación natural (le-che) de estos terneros, con el objetivo de hacerlo rumiante lo antes posible, sin importar lo que pasaba en una "Crianza Natural" al pie de su madre.
Drackley (2001) propuso la "Crianza Acelerada" o "Alimentación Intensificada" sugiriendo llamarla "Crecimiento Biológico Normal", ya que el ternero tiene que cubrir su requerimiento de mantenimiento y luego el de crecimiento que puede ser satisfecho de la misma manera que lo hace junto a su madre, pero teniendo en cuenta cada una de las circunstancias diarias de estrés que tiene que soportar como inclemencias climáticas, enfermedades, medidas de manejo, competencia con sus pares, etc. Esto es a los fines de atravesar esta etapa crítica de su vida de la mejor manera posible, aportando al rodeo vientres productivos y saludables, que expresen al máximo su potencial genético. Estos requerimientos fueron descriptos en NRC (2001), aunque han sido continuamente corregidos (Van Amburgh et al., 2014).
Durante la última década se ha comenzado a estudiar el efecto del aumento de la oferta de alimento líquido a los terneros de tambo, citándose como ventaja una mayor ganancia de peso (Hill et al., 2008) y altura (Kertz et al., 1998), aunque existe un atraso en el desarrollo ruminal y un menor consumo de alimento sólido (Khan et al., 2011). A su vez, se conoce que puede afectarse la performance de las terneras en sus futuras lactancias (Heinrichs y Jones, 2011; Soberon et al., 2012) modificando el programa de alimentación durante las primeras etapas de vida. Esta maximización de la producción en sus primeras lactancias se ha registrado con aumentos de producción que van entre 0 litros a 1403 litros de leche extra en su vida productiva (Van Amburgh et al., 2014).
Si bien existen numerosos ensayos acerca de los programas de alimentación en la crianza artificial de terneros, se debe continuar profundizando el estudio de los mismos para cono-cer con precisión su relación con el consumo de alimento sólido y la respuesta en creci-miento, que afectarán posteriormente la performance productiva de los animales.Especialista en Nutrición AnimalUniversidad Nacional de La PlataFacultad de Ciencias Veterinaria
Ghrelin antagonist regulates metabolic hormone receptorsin the hypothalamus of ewes
No full textThis study evaluates the effects of ghrelin antagonist on mRNA abundance for metabolic hormone receptors in feed-restricted ewes. Ewes were randomly assigned to one of three treatments; Control (CO): feed above maintenance energy intake requirements and daily subcutaneous saline infusion; Feed restriction (FR): feed restricted and daily subcutaneous saline infusion; Ghrelin antagonist (GA): feed restricted and daily subcutaneous of 7.5 μg/kg of D-Lys3-GHRP-6. Blood was sampled on days 1, 4, 9, and 13, relative to the start of the experiment, to quantify plasma glucose, NEFA and ghrelin concentrations. At day 13, the hypothalamus was collected to evaluate relative mRNA expression. The CO ewes had lesser plasma NEFA concentration compared with FR and GA ewes. There was a treatment by time interaction for plasma glucose concentration, all treatment started with similar plasma glucose concentration, but at day 13 CO ewes had a greater plasma concentration than FR and GA. Relative mRNA expression for glucagon receptor in GA ewes tended to be lesser compared with CO and FR treated ewes. There were no differences in insulin receptor mRNA relative expression between the groups. Ghrelin receptor mRNA relative expression tended to be greater in the GA compared with the CO treated ewes. There was no effect of GA on leptin receptors. However, there was a tendency toward greater relative expression of leptin receptor mRNA in the FR compared with the CO ewes. Relative expression of adiponectin receptor mRNA was lesser in the GA compared with CO and FR ewes. Cortisol receptor relative mRNA expression was greater in the FR compared with the CO ewes. Restricting dietary intake of ewes change mRNA relative expression of cortisol and leptin receptors in the hypothalamus of ewes. These variations are countered with ghrelin antagonist. Ghrelin antagonist modifies the mRNA relative expression of ghrelin, glucagon and adiponectin receptors. These results suggest that ghrelin could regulates metabolic hormone activity by modifying the relative expression of their receptors mRNA.Fil: Carranza Martin, Ana Cristina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET- La Plata. Instituto de Genética Veterinaria "Ing. Fernando Noel Dulout". Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Instituto de Genética Veterinaria; Argentina. Department of Animal Sciences; Estados UnidosFil: Parker, Anthony J.. Department of Animal Sciences; Estados UnidosFil: Furnus, Cecilia Cristina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET- La Plata. Instituto de Genética Veterinaria "Ing. Fernando Noel Dulout". Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Instituto de Genética Veterinaria; ArgentinaFil: Relling, Alejandro E.. Department of Animal Sciences; Estados Unidos. Ohio State University; Estados Unido
Effects of polyunsaturated fatty acid supplementation on plasma and follicular fluid resolvin D1 concentration and mRNA abundance in granulosa cells in ewes
No full textThe aim of this experiment was to evaluate the effect of increasing dietary omega-3 (n-3) polyunsaturated fatty acid (PUFA) supplementation on plasma and follicular fluid resolvin D1 (RvD1) concentration and the mRNA expression of genes related to RvD1 production, inflammatory response, oxidative stress, hormone receptors and production, and free fatty acid receptors in the granulosa cells of ewes. Dorset × Hampshire ewes (n = 24) aged 2 to 4 yr and with an initial body weight (BW) of 84.08 ± 13.18 kg were blocked by body condition score (BCS) and BW, and randomly assigned to 12 pens. Each pen within each block was randomly assigned to one of three treatments: 1) diet without fatty acid supplementation (control), 2) diet with 0.5% n-3 PUFA supplementation (PUFA0.5), and 3) diet with 1% n-3 PUFA supplementation (PUFA1). BW, BCS, and blood samples were obtained on day 1 and every 21 d for 3 mo. Ewes were then synchronized, superstimulated, and ovariectomized. Antral follicles were aspirated to evaluate RvD1 concentration in follicular fluid, and granulosa cells were used to determine mRNA abundance. Data were analyzed as a randomized complete block design using a mixed model (MIXED or GLIMMIX with log as a link function when data presented a nonnormal distribution). A polynomial effect of treatments was used to analyze RvD1 concentration and mRNA expression when there was no interaction. In addition, the correlation between plasma and follicular fluid RvD1 concentration was evaluated. We found no differences in BW (P = 0.28) and BCS (P = 0.29) between treatments. The concentration of RvD1 in plasma and follicular fluid linearly increased (P = 0.03) and tended to increase (P = 0.06) concomitantly to increasing PUFA supplementation. Plasma and follicular fluid RvD1 concentrations were positively correlated (r = 0.61; P < 0.01). The abundance of GPX1 and GPR32 mRNA tended to increase linearly with increasing PUFA supplementation (P = 0.06). In addition, PUFA supplementation linearly decreased and tended to decrease IL-1β and COX-2 mRNA abundance (P = 0.01 and P = 0.06, respectively). In conclusion, the correlation between plasma and follicular fluid RvD1 concentration indicates a relationship between both compartments. Also, the decrease of IL-1β and the increase of GPX1 mRNA abundance after PUFA supplementation could have beneficial effects on follicle development.Fil: Carranza Martin, Ana Cristina. Ohio State University; Estados Unidos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET- La Plata. Instituto de Genética Veterinaria "Ing. Fernando Noel Dulout". Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Instituto de Genética Veterinaria; ArgentinaFil: Garcia Guerra, Alvaro. Ohio State University; Estados UnidosFil: Relling, Alejandro Enrique. Ohio State University; Estados Unidos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET- La Plata. Instituto de Genética Veterinaria "Ing. Fernando Noel Dulout". Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Instituto de Genética Veterinaria; Argentin
Contribución al estudio de sistemas de identificación en bovinos basados en identificación electrónica y ADN para su aplicación a la trazabilidad y a la gestión de sistemas ganaderos
No full textLa presente tesis tiene por objetivo general contribuir al desarrollo de un sistema de identificación del ganado bovino en un sistema pastoril de producción, para ser aplicado a la gestión del sistema de producción y a la trazabilidad, basado en el uso conjunto de la identificación electrónica por radiofrecuencia y de marcadores moleculares.
Se planteó evaluar el funcionamiento de distintos tipos de identificadores electrónicos y de lectores de radiofrecuencia en condiciones de trabajo extensivo, desarrollar un sistema para transferir marcadores moleculares como código de identificación indeleble de cada animal a identificadores electrónicos y diseñar e implementar un sistema de aplicación práctica para la captura y el tráfico automático de datos, generando información para la gestión del proceso de producción.
Se evaluaron y compararon las pérdidas de dispositivos identificatorios. Se evaluó el funcionamiento de un lector fijo, determinando el posicionamiento óptimo de la antena para maximizar la eficiencia de lectura de las distintas presentaciones de identificadores. Se programó un lector portátil para registrar los eventos relevantes de ocurrencia con los animales libres en el campo. Se desarrolló un programa que permite grabar en un identificador electrónico determinados marcadores moleculares de un individuo, generando así una identificación genómica del mismo. Se desarrolló un software que interactúa con identificadores, lectores, y otros instrumentos de trabajo generando información para la gestión del sistema productivo.
Los dispositivos de identificación y los lectores podrían ser utilizados en los animales en condiciones de producción de la Argentina. Se demostró la posibilidad de uso de un lector portátil, si bien con algunas restricciones, con animales libres en el campo registrando los eventos relevantes para la gestión y trazabilidad. Se desarrolló un software específico para generar información que permita lograr este objetivo.Doctor en Ciencias VeterinariasUniversidad Nacional de La PlataFacultad de Ciencias Veterinaria
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