The analysis of mare ovaries activity depending on month of reproductive season, breed and age
Journal Title: Zeszyty Naukowe Uniwersytetu Przyrodniczego we Wrocławiu, Biologia i Hodowla Zwierząt - Year 2011, Vol 583, Issue 0
Abstract
The study included 21 mares of Małopolski horse, and 18 mares of Polish warmblood horse aged from 3 to 18 years. The mares were used for breeding in years 1999–2004 in a stud situated in south-west part of Poland. In total, 222 reproduction seasons were analysed. The results of an assessment of the follicular stage of mare ovaries conducted by ultrasonografic method with use of the Echosond USG apparatus, and palpable method (per rectum) in a scale from F0 to F4 were used in the study. The obtained results concerning the frequency of particular phases on mares ovaries were divided according to: month of the reproductive season, age, family and age of mares. Significance of differences between the parameters analysed was verified using Chi2 test. Significant differentiation in ovaries activity in particular months of the reproductive season were noted. The highest activity measured by F3 and F4 phases frequency corresponded to the highest breeding effectiveness. No influence of genetic factors (breed and family) and the age on the level of ovaries activity was observed. Higher activity measured by F2, F3, F4 phases frequency was observed on the left ovary.
Authors and Affiliations
Wojciech Kruszyński, Małgorzata Maliszewska, Katarzyna Wilk
Keywords
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