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Análisis de la leptina en vacas lecheras en periodo de transición y su efecto sobre la fertilidad.
| dc.contributor.advisor | Loor Loor, José | |
| dc.contributor.author | Ortega Tamayo, Erwing Leonardo | |
| dc.date.accessioned | 2022-05-02T16:19:19Z | |
| dc.date.available | 2022-05-02T16:19:19Z | |
| dc.date.issued | 2022 | |
| dc.identifier.uri | http://dspace.utb.edu.ec/handle/49000/11409 | |
| dc.description | This bibliographic review refers to the analysis of leptin in dairy cows in the transition period and its effect on fertility. Modern genetics has achieved the selection of cows with high capacity for milk production by lactation, however, this selection marked homeostatic imbalances in the transition period which has led to the presentation of metabolic disorders and reproductive failures, which negatively affect the profitability of dairy systems, the transition period has been considered as the process in which bovine females tend to acquire some disease. In addition, vacations in the transition period tend to use more energy than they ingest in their daily ration, which causes wear and tear on the bovine and it becomes very susceptible to health problems, causing alterations in reproduction, milk production and finally ends with the death of the bovine, however there are many adaptations that occur in the transition period. The conclusions detail that leptin concentrations vary with changes in body weight and percentage of fat deposits and dairy cows lose more than 60% of their body fat during early lactation, showing that leptin concentration decreases somewhat before childbirth. It is also very important to promote research based on the transition process to know how to progressively avoid the deterioration of the animal. | es_ES |
| dc.description | This bibliographic review refers to the analysis of leptin in dairy cows in the transition period and its effect on fertility. Modern genetics has achieved the selection of cows with high capacity for milk production by lactation, however, this selection marked homeostatic imbalances in the transition period which has led to the presentation of metabolic disorders and reproductive failures, which negatively affect the profitability of dairy systems, the transition period has been considered as the process in which bovine females tend to acquire some disease. In addition, vacations in the transition period tend to use more energy than they ingest in their daily ration, which causes wear and tear on the bovine and it becomes very susceptible to health problems, causing alterations in reproduction, milk production and finally ends with the death of the bovine, however there are many adaptations that occur in the transition period. The conclusions detail that leptin concentrations vary with changes in body weight and percentage of fat deposits and dairy cows lose more than 60% of their body fat during early lactation, showing that leptin concentration decreases somewhat before childbirth. It is also very important to promote research based on the transition process to know how to progressively avoid the deterioration of the animal. | es_ES |
| dc.description.abstract | La presente revisión bibliográfica hace referencia al análisis de la leptina en vacas lecheras en periodo de transición y su efecto sobre la fertilidad. La genética moderna ha logrado la selección de vacas con alta capacidad de producción de leche por lactancia, sin embargo, esta selección generó desajustes homeostáticos en el periodo de transición lo cual ha conllevado a la presentación de desórdenes metabólicos y fallas reproductivas, que inciden negativamente en la rentabilidad de los sistemas lecheros, el periodo transición se lo ha considerado como el proceso en el cual las hembras bovinas tienden a adquirir de alguna enfermedad. Además, las vacas en el periodo de transición tienden a utilizar más energía de la que ingieren en su ración diaria, lo cual ocasiona un desgaste en el bovino y se vuelve muy susceptible a problemas de salud, ocasionando alteraciones en la reproducción, producción de leche y por último termina con la muerte del bovino, sin embargo, existen muchas adaptaciones que ocurren en el periodo de transición. Las conclusiones detallan que las concentraciones de la leptina varían con cambios en el peso corporal y el porcentaje de depósitos de grasos y las vacas lecheras pierden más del 60 % de su grasa corporal durante la lactancia temprana, demostrándose que la concentración de leptina disminuye un poco antes del parto. También es muy importante el promover la investigación en base a el proceso de transición para saber cómo evitar el deterioro del animal, de manera progresiva. | es_ES |
| dc.format.extent | 23 p. | es_ES |
| dc.language.iso | es | es_ES |
| dc.publisher | BABAHOYO: UTB, 2022 | es_ES |
| dc.rights | Atribución-NoComercial-SinDerivadas 3.0 Ecuador | * |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/ec/ | * |
| dc.subject | Leptina | es_ES |
| dc.subject | Vacas lecheras | es_ES |
| dc.subject | Transición | es_ES |
| dc.title | Análisis de la leptina en vacas lecheras en periodo de transición y su efecto sobre la fertilidad. | es_ES |
| dc.type | bachelorThesis | es_ES |
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