Efeito da sazonalidade no perfíl protéico do plasma seminal e influência do probiótico no quadro espermático em touros da raça Tabapuã (Bos taurus indicus)

Abstract

In the 90s, researchers started studying the seminal proteic plasma profile and its relationship with fertility, whose objective was to study the function of each protein within the sperma frame in domestic species. In animal reproduction, another relevant factor for a good reproductive performance is feeding, being the probiotic the goal of unnumbered researchs reporting the use of them for weight gain, and food conversion. The present work had the objective of evaluating the winter and summer effects on the seminal plasma proteins, using SDS - PAG electroforesis and investigating the probiotic influence on weight, scrotum girth and spermiogram in Tabapuã bred bulls on range breeding. The 6 Kda proteic bands (81,81% in winter and 90,90% in summer) 9 Kda (90,90% in winter and 72,72% in summer) and 125 kda (81,81% in winter and 90,90% in summer) showed, in both seasons, the largest percentages among all the identified bands, the same happening with the 26 Kda band (100%) in summer. It was concluded that the seasons of the year can influence the presence or absence of seminal plasma proteins, however this has no relationship with the spermatic quality. The probiotic has not caused deleterious effect in the bulls' spermograms, and also has not exhibited a pro-action for weight gain and increasing of scrotal perimeter.