Effect of Low Temperature Thawing on the Motility and Fertility of Cryopreserved Water Buffalo and Zebu Bull Semen

The study was conducted to evaluate the quality of cryopreserved buffalo and zebu semen thawed and held at low temperature. Progressive motility of frozen semen thawed in a 37 °C water bath for 45 s (control) was compared with that of semen held in ice water (3-5 °C) for 180 min. Semen collected from 3 buffalo and 2 zebu bulls was used for this purpose over 3 weeks (replicates). Fertility was compared after performing 28 inseminations with buffalo semen and 100 inseminations with zebu semen either after control thawing or thawing straws in ice water for 30-60 min. Progressive motility of buffalo and zebu semen thawed and held in ice water for 30 and 90 min, respectively, was not different from that of semen thawed at 37 °C. The conception rate of buffaloes and zebu cows (69.2% and 60.0%) inseminated after control thawing was higher than that of animals inseminated with semen kept in ice water for 30-60 min (53.3% and 47.7%). However, the difference between conception rates after insemination with the 2 thawing methods was not significant in either case. It is concluded that there was a trend for decreased fertility for both buffalo and zebu semen when inseminations were performed after thawing and holding semen for 30-60 min in ice water.

Effect of Low Temperature Thawing on the Motility and Fertility of Cryopreserved Water Buffalo and Zebu Bull Semen

The study was conducted to evaluate the quality of cryopreserved buffalo and zebu semen thawed and held at low temperature. Progressive motility of frozen semen thawed in a 37 °C water bath for 45 s (control) was compared with that of semen held in ice water (3-5 °C) for 180 min. Semen collected from 3 buffalo and 2 zebu bulls was used for this purpose over 3 weeks (replicates). Fertility was compared after performing 28 inseminations with buffalo semen and 100 inseminations with zebu semen either after control thawing or thawing straws in ice water for 30-60 min. Progressive motility of buffalo and zebu semen thawed and held in ice water for 30 and 90 min, respectively, was not different from that of semen thawed at 37 °C. The conception rate of buffaloes and zebu cows (69.2% and 60.0%) inseminated after control thawing was higher than that of animals inseminated with semen kept in ice water for 30-60 min (53.3% and 47.7%). However, the difference between conception rates after insemination with the 2 thawing methods was not significant in either case. It is concluded that there was a trend for decreased fertility for both buffalo and zebu semen when inseminations were performed after thawing and holding semen for 30-60 min in ice water.
Turkish Journal of Veterinary and Animal Sciences-Cover
  • ISSN: 1300-0128
  • Yayın Aralığı: Yılda 6 Sayı
  • Yayıncı: TÜBİTAK
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