Indian Journal of Animal Research

  • Chief EditorK.M.L. Pathak

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Indian Journal of Animal Research, volume 52 issue 4 (april 2018) : 530-532

Understanding motility dynamics of crossbred bull spermatozoa when analyzed by Computer Assisted Semen Analyzer (CASA)

Saroj Rai, S. Tyagi, M. Kumar, M. Karunakaran, M. Mondal, A. Mandal, R. Behera
1CAR- National Dairy Research Institute ERS-Kalyani, Kalyani- 741 235, West Bengal, India
Cite article:- Rai Saroj, Tyagi S., Kumar M., Karunakaran M., Mondal M., Mandal A., Behera R. (2017). Understanding motility dynamics of crossbred bull spermatozoa when analyzed by Computer Assisted Semen Analyzer (CASA). Indian Journal of Animal Research. 52(4): 530-532. doi: 10.18805/ijar.v0iOF.9130.
The study was conducted to understand sperm kinetics of Frieswal bull spermatozoa using Computer Assisted Semen Analyzer (CASA). Fifty bull ejaculates were collected from ten healthy bulls that were in routine semen collection. The semen samples were diluted in Tris buffer at a concentration of 25x106 spermatozoa/ ml for analysis. Rapidly moving spermatozoa represented the one with better velocity and progressiveness while spermatozoa with medium motility had low velocity with short distance travelled in spite of its ability to move in a straight line (straightness, STR >70 %). The slow moving cells had good head and flagella movement but they followed a circular path with straight line velocity (VSL mm/ sec), linearity (LIN %) and straightenss (STR %) of 10.91, 9.00 and 22.54, respectively. Results indicated that individual sperm cells tracked by CASA as rapid, medium and slow motile were highly variable (p<0.001). However, the sperm motility between bulls varied (p<0.05) only in lateral head displacement (ALH, mm) and beat cross frequency (BCF, Hz).
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