Peculiarities of peroxide oxidation processes in boars' sperm depending on the season of a year and the intensity of their use

  • A. SHostya
  • V. Rokotyans’ka
  • V. Cibenko
  • M. Sokirko
Keywords: sperm, boars, sperm production, peroxide oxidation, TBK-active complexes

Abstract

The efficiency of systems of the reproduction of pigs' live-stock is influenced by many factors ‒ feeding, housing conditions of and the intensity of use. Each of these factors has a significant effect on the reproductive capacity of pigs, especially on the quality of sperm production of boars. In this regard, the purpose of the researches was to determine the dynamics of the quality of sperm production in boars, depending on the season of a year and the intensity of their use.The researches were conducted in the physiology of reproduction laboratory of Institute of Pig Breeding and agroindustrial production of NAAS, under conditions of the pedigree factory for breeding pigs of the Large White breed SE EE “Stepne” of IPB and AIP NAAS.It has been determined the fact that depending on the season of a year, qualitative and quantitative indexes of sperm production of boars are changing. The best indexes of sperm production were in the animals in the spring period. In the summer period, the quality of sperm in boars is likely to decreased: the mass of ejaculate on 11,5 % (p <0,05), the concentration of sperm on 27,1 % (p <0,01), the total number of sperms on 26,7 % (p <0,001), sperm motility on 8.3% (p <0,001) and their survival rate was on 13,4 % (p <0,001). Such changes are accompanied by a significant decrease in the activity of catalase by 30,6 % (p <0,01), and a significant accumulation of TBK-active compounds content on 46,9 % (p <0,01). However, with the advent of the winter period, the biological value of the received ejaculates from boars increases.The quality of sperm production of boars is significantly dependent from the regime of their use. It was found out that an increase in the intensity of the use of boars ‒ 2 and 3 times a week leads to a reduction of ejaculate on 9,8 and 16,5 %, the concentration of sperm ‒ on 10,2 and 20,9 %, as well as their mobility. However, the survival rate of sperm in the two-fold regime of the use of boars is significantly higher than once on 15,9 % (p <0,05), and the threefold receiving sperm is 22,5 % (p <0,001).The statistical analysis of the correlation between the physiological indexes of the quality of sperm production in boars of the Large White breed shows that there are significant positive correlations in the spring season between: the weight of the ejaculate and the number of spermatozoas (r = 0,56, p <0,001), mobility and survival ( r = 0,88, p <0,001). A significant correlation was found out between the content of TBK-active complexes and the weight of the ejaculate, which had r = 0,46 under the condition of one-time regime for taking sperm. At an increase in the sexual load on boars until receiving sperm, the concentration of TBK-active complexes correlated with the sperm motility r = 0,87.

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Published
2018-02-19
Section
Agricultural sciences (agronomics, agricultural ecology, land reclamation, ecology, crops husbandry, farming)