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The research was focused on the modern evaluation of boar semen parameters, using computer assisted sperm analysis (CASA), before and after liquid storage at 15oC. Semen was collected from 15 sexually mature boars by manual stimulation. Macroscopical and microscopical evaluation of semen was performed, followed by a detailed CASA analysis of all ejaculates. Subsequently, semen was diluted using 4 different extenders (Semtest, Androstar, MIII and Cronos) and stored at 15oC for 24 hours. Next, evaluation of progressive motility, total motility and viability was performed, using the same CASA system. All experiments were performed in triplicates and results were statistically analyzed. The average progressive motility after 24 hours was as follows: 69.56 ± 6.38 for MIII, 65.92% ± 2.63 for Semtest, 67.07% ± 5.58 for Androstar Plus and 68.93% ± 3.40 for Cronos. The viability results after 24 hours were: 86.34% ± 1.38 for Semtest extender, 93.55% ± 3.38% for Androstrar Plus, 89.19% ± 3.42 for MIII and 91.35% ± 2.37 for Cronos. The findings of this study suggest that the use of commercial extenders for short-term storage of swine semen is important in order to increase sperm longevity with minimal sperm function deterioration.

Liquid Storage of Boar Semen Using Commercial Extenders