The influence of mode of use and period of seasonal activity on quantitative and qualitative indicators of Oxford Down ram-sires’ sperm productivity
The results of experimental studies of quantitative and qualitative indicators of sperm in different modes of ram-sires’ use for 4, 6 and 8 ejaculates per week, in the non-breeding and breeding periods are presented. It was proved that in the non-breeding period in the mode of collecting 4 ejaculates per week compared to 6 and 8 ejaculates, the volume of ejaculate was higher by 3,4 and 17,2 %, respectively, the concentration of sperm by 4,3 and 10,2 %, the activity of freshly collected sperm by 0,8 and 2,8%, activity of deconserved sperm by 3,0 and 7,6 %, their resistance to freezing by 9,6 and 20,6 %, survival by 6,0 and 14,4 % and absolute survival rate by 3,8 and 10,3 %. During the breeding period in the same mode, the volume of ejaculate was greater by 10,3 % and 22,6 %, the concentration of sperm by 7,1 % and 16,7 %, the the activity of freshly collected sperm by 3,6 and 9,6%, activity of deconserved sperm by 5,4 and 10,8 %, their resistance to freezing by 7,9 and 17,1 %, survival by 4,1 and 11,5 and absolute survival rate by 3,1 and 5,6 %. It was experimentally confirmed that in the breeding period compared with the non-breeding one, the studied indicators of fresh and deconserved sperm, were significantly higher from 12,4 % to 45,6 % for the fresh sperm, and from 4,5 % to 16,5 percent for the cryopreserved one. The conducted studies showed that the sperm is biologically valuable in both periods of seasonal activity in the mode of collecting 4 ejaculates per week, and its qualitative indicators comply with the requirements for artificial insemination of sheep.
Sedilo G. M.; Vovk S. O.; Petry`shy`n M. A Current state and main directions of development of sheep breeding in the Carpathian region. Visnyk Dnipropetrovskogo derzhavnogo agrarno-ekonomichnogo universytetu, 2015, vol 3, pp. 107-111. (in Ukrainian).
Pomitun I. A. Indicators of reproductive capacity and breeding specialties on their increase in premium sheep breeds. Naukovo-texnichnyj byuleten Instytutut tvarynnycztva UAAN, 2004, vol 86, pp. 87-93. (in Ukrainian).
Bolotov Yu. I, Korinecz N. O. Results of insemination of Tauride-type Sheeps of Ascanian fine-grained breed with semen cryopreserved according to different technologies. Nauk. Visnyk «Askaniya Nova», 2008, vol 1, pp. 213-217 (in Ukrainian).
Gvozdetskiy N. A. The impact of the clinical status of the manufacturing rams used for the in vitro fertilization procedure on sperm quality. In: innovatsionnyie podhodyi v veterinarnoy i zootehnicheskoy nauke i praktike. 2016, pp. 222-226. (in Russian).
Ajbazov M.M., Aboneev V.V, Sely`onova M. Y`. Biotechnology of reproduction of sheep and goats. Stavropol, 2004, 324 P. (in Russian).
Malmakov N, Y`, Medeubekov K. U., Asylbekova K.K, Tomas D. L., Gotfredson R. G. Increasing the efficiency of artificial insemination of sheep with frozen semen. Ovtsyi, kozyi, sherstnoe delo. 2001б vol. 3, pp. 23-28 (in Russian).
Auzbaev S, A Storage of sperm of rams in liquid nitrogen. Nauka y obrazovanye, 2010, vol 2(19), pp.70-71 (in Russian).
Ibatullin I. I., Melnyk Yu..F., Otchenashko V.V.,. Sychov M. Yu,.Kryvenok M. Ya., Chyhryn A. I., Kondratiuk V. M., Ilchuk I. I., Umanets D. P., Yatsenko O. V., Balanchuk I. M. Workshop on feeding farm animals: a manual. 2015, Kyiv. 422 р. (in Ukrainian).
StatSoft, Inc. STATISTICA (data analysis software system), version 9.0 (2009), www.statsoft.com.
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