Efecto del fotoperiodo sobre la concentración plasmática de estradiol y progesterona en pavas criollas (Meleagris gallopavo) en la región de Ñuble, Chile
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Date
2024
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Journal ISSN
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Publisher
Universidad de Concepción
Abstract
El pavo criollo posee importantes características, como la rusticidad y actitud para adaptarse en diversos ambientes y zonas geográficas, lo cual es de gran relevancia para las familias campesinas que mantienen su crianza en nuestro país. Mediante el estudio de factores que afectan la reproducción de estas aves, se puede obtener mayor conocimiento y contribuir a la conservación del patrimonio genético del género Meleagris. Este trabajo tiene como objetivos, determinar cómo influye el fotoperiodo en la concentración plasmática de estradiol y progesterona en pavas criollas en la región de Ñuble, y comparar la dinámica que ocurre en la expresión de estas dos hormonas. Se recolectaron muestras de sangre de 13 hembras juveniles, una vez al mes, desde julio a diciembre, en los cuales hay un aumento gradual de las horas luz, favoreciendo al fotoperiodo de “días largos”. La cuantificación de la concentración plasmática de estradiol y progesterona se obtuvo por medio de la técnica radioinmunoensayo (RIA). Los resultados que se obtuvieron del estradiol en este estudio fueron: en los meses de julio 39,58 pg/mL; agosto 89,42 pg/mL; septiembre 269,84 pg/mL y octubre 290,83 pg/mL; donde hubo incremento de la concentración. En cambio, en noviembre fue de 184,04 pg/mL; y diciembre 197,57 pg/mL; donde hubo disminución. En el caso de la progesterona, los resultados fueron: en los meses de julio 0,68 ng/mL; agosto 0,87 ng/mL; septiembre 1,46 ng/mL; octubre 1,76 ng/mL; noviembre 1,12 ng/mL y diciembre 2,13 ng/mL. La concentración plasmática de estradiol y progesterona tuvieron un aumento progresivo en el periodo de de “días largos” en las hembras de pavo criollo.
The creole turkey as a species has important characteristics, such as rusticity and attitude to adapt in different environments and geographical areas, which is of great relevance for peasant families that maintain their breeding in our country. Through the study of different factors that affect the reproduction of these birds, more knowledge has been obtained and thus, contributes to the conservation of the genetic patrimony of the genus Meleagris. The objectives of this work are to determine how the photoperiod influences the plasmatic concentration of estradiol and progesterone in creole hens in the Ñuble region, and to compare the dynamics that occur in the expression of these two hormones. Blood samples of 13 juvenile females were collected once, of july to december, in which there is a gradual increase in daylight hours, favoring the permissive photoperiod. The quantification of the plasma concentration of estradiol and progesterone was obtained by means of the radioimmunoassay (RIA) technique. The results obtained from this study were: in the months of july 39.58 pg/mL; august 89.42 pg/mL; september 269.84 pg/mL; october 290.83 pg/mL; there is an increase in estradiol, on the other hand, in november 184.04 pg/mL and december 197.57 pg/mL there is a decrease. In the case of progesterone, the results were: in the months of july 0.68 ng/mL; august 0.87 ng/mL; september 1.46 ng/mL; october 1.76 ng/mL; november 1.12 ng/mL and december 2.13 ng/mL. The plasmatic concentrations of estradiol and progesterone have a progressive increase in the period of increase, in creole turkey females.
The creole turkey as a species has important characteristics, such as rusticity and attitude to adapt in different environments and geographical areas, which is of great relevance for peasant families that maintain their breeding in our country. Through the study of different factors that affect the reproduction of these birds, more knowledge has been obtained and thus, contributes to the conservation of the genetic patrimony of the genus Meleagris. The objectives of this work are to determine how the photoperiod influences the plasmatic concentration of estradiol and progesterone in creole hens in the Ñuble region, and to compare the dynamics that occur in the expression of these two hormones. Blood samples of 13 juvenile females were collected once, of july to december, in which there is a gradual increase in daylight hours, favoring the permissive photoperiod. The quantification of the plasma concentration of estradiol and progesterone was obtained by means of the radioimmunoassay (RIA) technique. The results obtained from this study were: in the months of july 39.58 pg/mL; august 89.42 pg/mL; september 269.84 pg/mL; october 290.83 pg/mL; there is an increase in estradiol, on the other hand, in november 184.04 pg/mL and december 197.57 pg/mL there is a decrease. In the case of progesterone, the results were: in the months of july 0.68 ng/mL; august 0.87 ng/mL; september 1.46 ng/mL; october 1.76 ng/mL; november 1.12 ng/mL and december 2.13 ng/mL. The plasmatic concentrations of estradiol and progesterone have a progressive increase in the period of increase, in creole turkey females.
Description
Tesis presentada para optar al título de Médico Veterinario.
Keywords
Pavos, Estradiol, Progesterona