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A Study on Standards for Farm Housing Systems: Acoustic Analysis of Feed Anticipating Calls of Heifers and Cows

사육시설 기준 설정 연구: 사료급여 전 젖소 발성음에 대한 음성학적 분석

  • 천시내 (경상대학교 대학원 응용생명과학부) ;
  • 이준엽 (농촌진흥청 국립축산과학원 축산환경과) ;
  • 양승학 (농촌진흥청 국립축산과학원 축산환경과) ;
  • 박규현 (강원대학교 동물생명시스템학과) ;
  • 전중환 (농촌진흥청 국립축산과학원 축산환경과)
  • Received : 2014.02.04
  • Accepted : 2014.03.10
  • Published : 2014.03.30

Abstract

The goal of this study was to investigate acoustic characteristic of feed anticipating calls of heifers and cows. 6 cows and 6 heifers housed in a pen ($6.0m{\times}10.0m$) which was bedded with sawdust and straw. They were fed a standard ration of commercial concentrate and hay was ad libitum. The calls of heifers and cows were divided into Type 1 and Type 2 which were classified based on the shapes of waveform and spectrograms, respectively. There was difference in the fundamental frequency (P < 0.0001) and $1^{st}$ formant (P < 0.0077) among the calls. Acoustic parameters with the exception of fundamental frequency and $1^{st}$ formant were no difference between cows' calls and heifers' calls (P > 0.05). Duration of cows' calls was lower than that of heifers' calls, whereas the intensity of Type 1 calls was higher than that of Type 2 calls (P > 0.05).

Keywords

References

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