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Archivos de Zootecnia

On-line version ISSN 1885-4494Print version ISSN 0004-0592


BRAVO, J.A.; MONTANERO, J.; CALERO, R.  and  ROY, T.J.. Relations among the subjective and computer-assisted variables of ram sperm motility. Arch. zootec. [online]. 2011, vol.60, n.232, pp.1087-1094. ISSN 1885-4494.

The present study examines the existing relationships among sperm motility variables in ejaculates from Île de France rams throughout a year, obtained by means of both subjective analysis and computer-assisted system ISAS® (Integrated Semen Analysis System). The results show a strong association among parameters of the same kind, being the correlation coefficient r>0.80 (p<0.01) when the relationship occurs between linear velocity (VSL) and average path velocity (VAP), between porcentage of inmovil spermatozoa (EST) and rapid espermatozoa (RAP), and between masal motility (MM) and individual motitity (MI). The relationships among groups of a different kind (velocities vs. variables expressed as percentages) are moderate or low, when existent; however, those between lineatity (LIN) and lateral head displacement (ALH) (r= -0.866, p<0.01) and between MI and RAP (r= 0.799, p<0.01) are high. In view of the results, it may be stated that there exists a concordance between the parameters subjectively established and those provided by computer-assisted system CASA, being MI the subjective parameter that best explains the variables obtained by ISAS®.

Keywords : Spermatozoa; CASA.

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