Journal of Animal Environmental Science (한국축산시설환경학회지)

The Korean Society of Animal Environmental Science & Technology (한국축산환경학회)
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Effects of an Unexpected Change in Housing Environment on Stress in Poultry

급격한 사육환경의 변화가 가금의 생산성과 스트레스에 미치는 영향

  • Kim, Jimin (Division of Applied Life Science, Gyeongsang National University, Poultry Science Division) ;
  • Yoon, Hyung-sook (Division of Applied Life Science, Gyeongsang National University, Poultry Science Division) ;
  • Hwangbo, Jong (National Institute of Animal Science, RDA) ;
  • Kim, Sang-Ho (National Institute of Animal Science, RDA) ;
  • Choi, Yang-Ho (Department of Animal Science, Gyeongsang National University)
  • 김지민 (경상대학교 대학원 응용생명과학부) ;
  • 윤형숙 (경상대학교 대학원 응용생명과학부) ;
  • 황보종 (농촌진흥청 국립축산과학원 가금과) ;
  • 김상호 (농촌진흥청 국립축산과학원 가금과) ;
  • 최양호 (경상대학교 축산학과)
  • Received : 2012.11.17
  • Accepted : 2012.12.06
  • Published : 2012.12.30
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Abstract

The objective of this study was to evaluate the effects of an unexpected change in housing environment on stress in poultry. Laying hens (Hy-line Brown), adapted to a free-range housing system for more than a month, were randomly divided into two groups to be subjected to an unexpected change of their housing environment: one half of them were individually housed into conventional battery cages and the other continually left in the same housing system throughout the entire period of the study. The sudden change resulted in an increase in egg production and albumen height (P<0.05), but decrease in eggshell thickness (P<0.05). The change had tendency to increase Haugh unit ($P{\leq}0.061$) and to decrease eggshell color ($P{\leq}0.074$), but did not affect body weight for 5 days thereafter. No significant changes were detected in liver color. Plasma concentrations of corticosterone was acutely increased one day after the change (P<0.05), then returned to similar control levels. The results of the present study indicate that unexpected changes in housing environment cause acute increase in stress hormone concentrations, but interpretation of the results should be cautious due to the experimental conditions.

본 연구의 목적은 급격한 사육환경의 변화가 가금의 생산성과 스트레스 반응에 미치는 영향을 조사하는 것이다. 한달 이상 사육실에서 방사된 하이라인 갈색 산란계를 무작위로 두 집단으로 나누어 반을 계속해서 같은 방사환경에서, 다른 나머지 반을 관행 케이지에서 수용하여 사육하였다. 이러한 갑작스런 사육환경의 변화는 산란율 그리고 농후난백의 높이를 증가시켰고 (P<0.05), Haugh unit를 증가시키는 경향이 있었다 (P<0.061). 그러나 난각두께는 감소되었고 (P<0.05), 난각색은 감소되는 경향이 있었다. 환경변화 후 5일간산란계의 체중에는 변화가 없었으며 실험 종료시에 측정된 간의 색도에도 차이가 없었다. 관행 케이지로 이동된 다음날 혈장 corticosterone 농도는 급격하게 증가하였지만 (P<0.05), 5일째에는 대조구의 수준과 차이가 없었다. 이러한 결과는 급격한 사육환경의 변화는 스트레스 호르몬의 분비를 증가시킨다는 것을 사사한다. 그러나 제한된 실험조건 때문에 생산성에 관한 결과의 해석에 주의해야 할 필요가 있다.

Keywords

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