Original scientific paper

https://doi.org/10.46419/vs.54.2.3

Comparison of morphometric and histological properties of testicles and sperm production in breeding bulls with different reaction to stress

Оleksandr Chernenko ; Dnipro State Agrarian and Economic University, Faculty of Biology and Technology, Dnipro, Ukraine
Volodymyr Prishedko ; Dnipro State Agrarian and Economic University, Faculty of Biology and Technology, Dnipro, Ukraine
Оlena Chernenko ; Dnipro State Agrarian and Economic University, Faculty of Biology and Technology, Dnipro, Ukraine
Roman Mylostyvyi ; Dnipro State Agrarian and Economic University, Faculty of Biology and Technology, Dnipro, Ukraine
Natalia Shulzhenko ; Dnipro State Agrarian and Economic University, Faculty of Veterinary Medicine, Dnipro, Ukraine
Olga Bordunova ; Sumy National Agrarian University, Faculty of Biology and Technology, Sumy, Ukraine

Abstract

The aim of this study was to determine the association between bulls with different resistance to stress and the morphological and histological characteristics of the testicles and epididymis, and quantitative and qualitative indicators of sperm production for the first three years of their use on a regional breeding holding. Based on cortisol concentrations before and after stress, bulls were divided into two groups, the first with higher stress resistance (n=9) and the second with lower stress resistance (n=7). Animals of the second group had a 11.9% higher incidence of rejected sperm due to poor quality. Animals with a higher stress resistance had a 16.6% larger relative area of the seminal canals, higher weight of the testicles, larger size of the testicles, in both length and width, higher weight of the testicular appendage, and better development of the two testicular appendages. The adaptive capacity of breeding bulls should be selectively improved to evaluate their stress resistance according to the cortisol concentrations before and one hour after stress. When completing herds, it is preferable to use animals with a higher resistance to stress.

Keywords

bulls; morphological and histological characteristics of the testicles; sperm quality

Hrčak ID:

279019

URI

https://hrcak.srce.hr/279019

Publication date:

14.8.2022.

Article data in other languages: croatian

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