Comparison of different diluents to measure swine sperm concentration on the spectrophotometer
DOI:
https://doi.org/10.5433/1679-0359.2011v32n4Sup1p1965Keywords:
Semen, Swine, Spectrophotometer, Diluent solution.Abstract
To obtain success in an artificial insemination (AI) program, it is essential that the AI centrals produce high quality insemination doses (ID); one important factor is to use the correct sperm concentration by ID. To determine sperm concentration, spectrophotometry could be used. This technique consists in the reading of sperm concentration through the measurement of light transmittance percent in the ejaculate sample. Usually, when executing this technique, cancerigenous solutions, as formalin, or neurotoxic solutions, as glutaraldehyde, are used. This work aimed to compare different diluent solutions to measure swine sperm concentration on the spectrophotometer. Fifty three swine male breeders from different strains and with proven fertility were used. Ejaculates were collected by the gloved hand method. A spectrophotometer (QUIMIS Q-798DMR), previously calibrated with the semen from the animals of the own farm, was used. In the cuvettes, 0.03 mL of the ejaculate sample was added to 2.97 mL of saline phormol (T1) or physiologic solution (T2). Data was analyzed by ANOVA using Statistix 2003 software. There was no difference between treatments (P > 0,05). Mean concentration of 5.52x106 ± 75.0 and 5.50x106 ± 68.0 sperm/mL, corresponding to 68.2 ± 2.5 and 67.1 ± 2.5 % transmittance were observed for T1 and T2, respectively. Replacing saline formalin with physiologic solution does not bring losses in the results and keeps the laboratory formalin-free. Therefore, using physiologic solution to read ejaculate concentration on the spectrophotometer is more indicated in swine AI centrals.
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