Journal of Embryo Transfer (한국수정란이식학회지)

The Korean Society of Embryo Transfer (한국수정란이식학회)
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Studies on the Relationship between Number of Repeat and Duration of Estrous Behavior in Hanwoo and Holstein Cattle

한우와 젖소의 발정 행동 반복수와 지속 시간에 관한 연구

  • Son, Jun-Kyu (Dairy Science Division, National Institute of Animal Science, RDA) ;
  • Park, Seong-Jai (Dairy Science Division, National Institute of Animal Science, RDA) ;
  • Baek, Kwang-Soo (Dairy Science Division, National Institute of Animal Science, RDA) ;
  • Choi, You-Lim (Dairy Science Division, National Institute of Animal Science, RDA) ;
  • Lee, Myeung-Sik (Hanwoo Experiment Station, National Institute of Animal Science, RDA) ;
  • Kim, Sang-Bum (Dairy Science Division, National Institute of Animal Science, RDA) ;
  • Kim, Hyeon-Shup (Dairy Science Division, National Institute of Animal Science, RDA) ;
  • Shin, Seung-Oh (Dairy Science Division, National Institute of Animal Science, RDA) ;
  • Park, Choon-Keun (Department of Animal Biotechnology, College of Animal Life Sciences, Kangwon National University) ;
  • Park, Soo-Bong (Planning & Coordination Division, National Institute of Animal Science, RDA)
  • 손준규 (농촌진흥청 축산과학원 낙농과) ;
  • 박성재 (농촌진흥청 축산과학원 낙농과) ;
  • 백광수 (농촌진흥청 축산과학원 낙농과) ;
  • 최유림 (농촌진흥청 축산과학원 낙농과) ;
  • 이명식 (농촌진흥청 축산과학원 한우시험장) ;
  • 김상범 (농촌진흥청 축산과학원 낙농과) ;
  • 김현섭 (농촌진흥청 축산과학원 낙농과) ;
  • 신승오 (농촌진흥청 축산과학원 낙농과) ;
  • 박춘근 (강원대학교 동물생명과학대학 동물생명공학과) ;
  • 박수봉 (농촌진흥청 축산과학원 축산기획조정과)
  • Published : 2008.09.30
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Abstract

The objective of this study was to investigate the relationship between behavioral signs and duration of estrous in Hanwoo and Holstein cattle for the prediction of optical insemination. Fifty two of 58 and 71 of 89 in Hanwoo and Holstein cows or heifers showed estrous exhibition within 72 h after 2 days following $PGF_{2}\alpha$ administration, respectively. The number of mounting and standing heat were 54.2 and 57.6, 59.4 and 53.5, 42.0 and 30.8 and 16.2 and 10.7 times in Hanwoo cows, Hanwoo heifers, Holstein cows and Holstein heifers, respectively. Duration of mounting were no significantly difference for Hanwoo cows ($21.2\pm11.3$), Hanwoo heifers ($19.9\pm11.4$), Holstein cows ($8.7\pm4.4$) and Holstein heifers ($16.9\pm8.0$). Duration of standing heat were significantly (p<0.05) shorter for Holstein cows ($5.4\pm3.4$) than for Hanwoo cows ($17.1\pm9.6$), Hanwoo heifers ($16.5\pm6.3$) and Holstein heifers ($15.0\pm7.2$). Time until mounting after injection of $PGF_{2}\alpha$ were significantly (p<0.05) longer for Holstein cows ($56.3\pm11.45$) than for Hanwoo cows ($42.71\pm10.44$), Hanwoo heifers ($36.6\pm8.21$) and Holstein heifers ($40.70\pm6.15$). Time until standing heat after injection of $PGF_{2}\alpha$ were significantly (p<0.05) longer for Holstein cows ($61.6\pm8.92$) than for Hanwoo cows ($46.2\pm11.49$), Hanwoo heifers ($42.7\pm6.06$) and Holstein heifers ($44.1\pm6.72$). In the results of this study, duration of standing heat was the shortest in Holstein cows ($5.4\pm3.4$). The estimation of estrous with Holstein cows has more difficulty because to significantly shorter duration of standing heat than for Hanwoo cows, Hanwoo heifers and Holstein heifers. The standing heat can be a good predictor for time of ovulation but it is concluded that mounting behavior could be the best predictor for time of ovulation.

Keywords

References

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