Features of the adaptive reaction of the sheep related to meat productivity of different ecogenesis

DOI: 10.32900/2312-8402-2021-126-112-120

Pomitun I.A.,
doctor agricultural science, profesor,
Kosova N.O.,
Candidate of Agricultural Sciences, senior scientist,
Pankiv L. P.,
Candidate of Agricultural Sciences, senior scientist,
Institute of Animal Science of the National Academy of Agrarian Sciences of Ukraine

Keywords: adaptive reaction, sheep, ecogenesis, growth intensity, fertility, breed, air temperature


The article highlights the issues of the adaptive response of the body of ewes to the influence of environmental conditions. Animals are related to three local breeds of meat productivity. Parameters of reproduction and growth rate of animals’ offspring were evaluated.
The research was conducted on sheep of meat breeds of different ecogenesis: Suffolk, Latvian Dark-Head, Dnieper Meaty, and crossbreds. The crossbred animals had clear genotypic and phenotypic differences, as well as conditions of housing in the facility – FOP “Gragdanova O.Yu” of Kharkiv region. Daily temperature fluctuations were taken into account during the two cycles of insemination of ewes and their reproductive capacity and growth rate of lambs obtained from 60-70 days.
It was found that ewes classified in the first group were inseminated at an average daytime temperature of 28.8 °C, which is almost 7 °C (%) higher, than animals in the second group. The difference between the compared groups was highly probable (p<0.001). Per 100 lambs, the yield of lambs in the first and second groups was 129.2% and 136.5%, respectively.
Significant fluctuations in the fertility of ewes and the intensity of growth of lambs from birth to 60-70 days of the age of different breeds and linear-breed combinations were revealed. High combining ability of breeders of the new line 024/063 of the Dnieper Meaty breed in terms of the fertility of ewes and intensity of growth of lambs at purebred breeding and crossing with the Latvian Dark-Head breed was revealed.


  1. Collier, R. J., Renquist, B. J., & Xiao, Y. A. (2017). 100-year review: stress physiology includюing heat stress. J. Dairy Sci., 100, 10367–10380. doi: https://doi.org/10.3168/jds.2017-13676.
  2. Romo-Barron, C. B., Diaz, D., Portillo-Loera, J. J., Romo-Rubio, J. A., Jimenez-Trejo, F., & Montero-Pardo, A. (2019). Impact of heat stress on the reproductive performance and physiology of ewes: a systematic review and meta-analyses. Int. J. Biometeorol63(7). 949–962.doi: 10.1007/s00484-019-01707-z.
  3. Silanikove, N. (2000). Effects of heat stress on the welfare of extensively managed domestic ruminants. Livestock Prod Sci., 67(1–2), 1–18. doi: https://doi.org/10.1016/S0301-6226(00)00162-7.
  4. Bernabucci, U., Lacetera, N., Baumgard, L. H., Rhoads, R. P., Ronchi, B., & Nardone, A. (2010). Metabolic and hormonal acclimation to heat stress in domesticated ruminants. Animal, 4(7), 1167–1183.doi: 10.1017/S175173111000090X
  5. Marai, I. F. M., El-Darawany, A. A., Fadiel, A., Abdel-Hafez, M. A. M. (2007). Physiological traits as affected by heat stress in sheep: a review. Small Ruminant Res., 71(1–3), 1–12. doi: 10.1016/j.smallrumres.2006.10.003.
  6. Al-Dawood, A. (2017). Towards heat stress management in small ruminants: a review. Ann. Animal Sci., 17(1), 59–88. doi: 10.1515/aoas-2016-0068.
  7. Yeates, N. (1953). The effect of high air temperature on reproduction in the ewe. The Journal of Agricultural Science, 43(2), 199–203. doi: 10.1017/S002185960004497X
  8. Van Wettere, W. H. E. J., Kind, K. L., Gatford, K. L., Swinbourne, A. M., Leu S. T.,   Hayman, P. T. & Walker, S. K.  (2021).  Review of the impact of heat stress on reproductive performance of sheep. J. Animal Sci. Biotechnol. 12, 26. Retrieved from https://jasbsci.biomedcentral.com/articles/10.1186/s40104-020-00537-z
  9. Vdovychenko, Yu. V., Omelchenko, L. O., Fursa, N. M., Makarchuk, R. M., & Yaremchyk, A. I. (2013). Mekhanizmy adaptatsii tvaryn pivdennoi miasnoi porody velykoi rohatoi khudoby do ekstremalnykh umov Stepovoi zony Ukrainy [Mechanisms of adaptation of animals of the southern meat breed of cattle to extreme conditions of the Steppe zone of Ukraine]. Науковий вісник «Асканія-Нова» [Scientific Herald “Askania Nova”]. Nova Kakhovka: Pyel, 6, 109–117 [in Ukrainian].
  10. Zhmurovskyi, I. O., & Kushnerenko, V. H. (2019). Polipshennia umov utrymannia velykoi rohatoi khudoby v umovakh zmin klimatu [Improving the housing conditions of cattle in the context of climate change]. Suchasnyi stan ta perspektyvy rozvytku tvarynnytstva Ukrainy v umovakh yevrointehratsii: materialy vseukrainskoi internet konferentsii [Current Status and Prospects of Livestock Development in Ukraine in the context of European integration, Proceedings of the All-Ukrainian Internet Conference.Kherson, 190–206 [in Ukrainian].