Correlation between the relative permittivity, conductivity, and qualitative indicators of bull and boar ejaculates
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Mendel University of Agriculture and Forestry, Zemědělská 1, 613 00 Brno, Czech Republic
Publication date: 1997-02-06
J. Anim. Feed Sci. 1997;6(1):13–22
The dielectric and electric properties (specific conductivity measured by four electrodes and two electrodes, real part of relative permittivity and high-frequency specific conductivity) of 31 ejaculates from bulls and 25 ejaculates from boars used for insemination were studied on the day of sampling and after 48 h. The correlation of the results with standard indicators of the quality of the ejaculate (sperm concentration, sperm activity and volume of the ejaculate) was investigated. The average concentration of bull sperm was 1.22 ± 0.46 mld cm-3, of the filtered spermatic fraction of boar sperm 581.00 mil.cm-3; the average sperm activity of bulls and boars was only 68.7 ± 6.6% and 78.0 ± 4.8%, respectively; the average volume of the ejaculate of bulls and boars was 12.39 ± 4.72 and 242.00 ± 111.00 cm3, respectively. Correlations between the concentrations of the sperm of bulls and specific and high-frequency conductivity were always negative ( rp = - 0.09 to - 0.75), between the activity and specific fourelectrode conductivity the correlation was positive (rp = 0.48), between the volume of the ejaculate and specific conductivity as well as relative permittivity it was again negative (rp= - 0.17 to - 0.72). In boars the correlations between sperm activity and all of the studied dielectric and electric properties were always positive.
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