Browsing by Author "Veloz Veloz, Dina Maricela"

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    Evaluación de la calidad espermática de reproductores bovinos mediante el uso de sistemas de evaluación seminal convencional y sistema CASA (análisis seminal asistido por computadora) y su respuesta con la fertilidad por inseminación artificial
    (2017) Veloz Veloz, Dina Maricela; Alberio Arce, Ricardo Horacio
    The objective of this study was to compare the results of some parameters of seminal quality of bulls obtained by the Conventional method and also by the computerized CASA system, other objective was to determinate if there is any difference in seminal quality between JE, HO and BS bulls. Semen samples were collected from 5 bulls: Individual motility (%), Mass motility (1-5), Neubauer chamber concentration (106 sptz/ml) and individual post-freezing motility (%). The same samples were by CASA method, which variables are: Total motility (%), Progressive motility (%), concentration (106 sptz/ml) and total post-freezing motility (%). Results obtained by each breed of bulls in these parameters were compared using a Duncan multiple range test to assess statistical differences. The result was that Jersey bull’s semen had the higher counts for most the variables compared with the other two. The entire population of results by the Conventional method was also compared against the entire population of results by CASA, in those parameters that are equivalent between the two methods: motility (individual vs total), concentration (Neubabuer vs CASA) and post-freezing motility. This comparison was performed with a Student test that proved there were differences between the two methods in all the studied parameters. In the case of motility, the conventional method showed an average 79% against of the CASA system. In concentration the conventional method presented a lower result than CASA. Finally about the post-freezing motility the conventional method had the highest result against of CASA. The conclusion was that the numeric results of spermatic quality are different depending on which method is used. Regarding the live evaluation that the highest percentage of fertility was obtained the jersey breed