Characterisation of movement pattern and velocities of stallion spermatozoa depending on donor, season and cryopreservation

Autor: Armin Tuchscherer, Helmut Torner, Wilhelm Kanitz, Christina Warnke, Hannelore Alm, Steffen Blottner
Rok vydání: 2003
Předmět:
Zdroj: Acta Veterinaria Hungarica. 51:395-408
ISSN: 1588-2705
0236-6290
DOI: 10.1556/avet.51.2003.3.13
Popis: The aim of the study was to compare different types of movement pattern and velocities of stallion spermatozoa depending on cryopreservation during breeding and non-breeding season. Ejaculates were collected from four stallions during May (n = 24) and December (n = 24). Parameters of sperm movement were evaluated by computer-aided sperm analysis (CASA) system, and included percentages of motile spermatozoa, different patterns of motility, the velocity, linearity (LIN), amplitude of lateral head displacement (ALH) and beat-cross frequency (BCF). In winter the average percentages of motility were slightly higher compared to the breeding season in May (70.8 ± 12.7% vs. 66.8 ± 12.2%, respectively). Cryopreservation and thawing led to a significant decrease in the number of motile sperm to 11.3 ± 5.8% in May and 15.6 ± 7.0% in December. The pattern of motility was also changed. Detailed analysis by CASA demonstrated that cryopreservation resulted in a shift from the proportions of linear to more non-linear motile spermatozoa and to a significant increase of local motile and hyperactivated spermatozoa. Mean velocity of fresh motile spermatozoa differed between May and December (119.1 ± 43.9 vs. 164.4 ± 66.4 µm/sec, respectively; P < 0.05). Cryopreservation and thawing led to a slight increase of curvilinear velocity (VCL) and straight line velocity (VSL). The motility analysis has shown that the parameters BCF and ALH were highly correlated in stallion spermatozoa (r = -0.67; P < 0.001). The BCF of stallion spermatozoa was slightly reduced in the non-breeding season. Altogether, the influence of factors on the motility of stallion spermatozoa has the following rank order: cryopreservation (P < 0.0001) ≯ stallion (P < 0.001) ≯ season (P < 0.05).
Databáze: OpenAIRE
Externí odkaz: