Season-dependent Changes in Semen Quality and Storage Longevity of Hampshire Crossbred Boars Maintained in North Eastern India

Le résumé fourni par la source

Background: The current study assessed the impact of seasonal fluctuation on semen quality and the storage of liquids capability in Hampshire crossbred boars. Northeastern India is known for its significant rainfall, moderate ambient temperatures and high relative humidity. Methods: Semen samples were collected during three distinct seasons, viz. pre-monsoon (March-May), monsoon (June-September) and post-monsoon (October-February). Ejaculates were diluted in Beltsville Thawing Solution (BTS) extender and preserved at 18°C in a BOD incubator. Sperm quality was assessed using computer-assisted semen analysis (CASA) at 0, 3 and 5 days of liquid preservation. Result: The results revealed a significant (p less than 0.01) impact of the season and length of preservation on most CASA parameters. Semen collected during the pre-monsoon season exhibited significantly higher TM, PM and velocity-related parameters at day 0 and day 3 of liquid storage compared to monsoon and post-monsoon seasons. A progressive decline in sperm movement and kinematic attributes was observed with advancement of storage period across all seasons. Correlation analysis demonstrated strong and season-specific associations of TM and PM with velocity and trajectory-related CASA parameters, particularly during monsoon and post-monsoon seasons. The study concludes that seasonal variation significantly influences the liquid preservation potential of Hampshire crossbred boar semen under NEH region conditions, with the pre-monsoon season being comparatively more favourable for short-term liquid storage in BTS extender at 18°C.

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