케이지 사육시 사육밀도가 산란계의 깃털손상도, 계란품질, 혈액성상 및 스트레스 호르몬 농도에 미치는 영향

국문 초록 (Abstract)

본 연구는 케이지 사육 시 사육밀도가 산란계의 깃털 손상도, 계란품질, 혈액성상 및 스트레스 호르몬 농도에 미치는 영향을 구명하기 위하여 수행되었다. 산란계(Hy-Line Brown) 700수를 공시하여 배터리 케이지에 750 ㎠/수 및 500 ㎠/수 사육밀도 처리구로 50 반복을 두어 32주부터 60주까지 총 28주간 실시하였으며, 사료와 물은 자유 급이 하였다. 사육밀도가 증가함에 따라 주령이 증가할수록 깃털손상도가 증가하였으며, 등과 꼬리 부위의 손상이 유의적으로 증가하였다. 계란품질(난중, Haugh unit, 난각 강도 등)은 사육밀도에 따른 처리구 간 유의적 차이는 나타나지 않았다. 또한, 혈구 성분 및 혈액 생화학 지표는 사육밀도에 의한 영향을 받지 않는 것으로 나타났다. 그러나 시험종료 시점의 혈액과 깃털 내 스트레스 호르몬인 corticosterone 농도를 분석한 결과, 500 ㎠/수 사육밀도에서 사육 시 750 ㎠ 보다 높게 나타났다. 결론적으로 케이지에서 500 ㎠/수 사육밀도 사육은 산란계의 깃털손상도를 증가시켜 부정적인 영향을 미치는 것으로 보이며, 향후 산란계의 행동과 관련된 추가 연구가 필요할 것으로 판단된다.

다국어 초록 (Multilingual Abstract)

The purpose of this study was to evaluate the effects of stocking density on feather condition, egg quality, blood parameters, and corticosterone levels of laying hens reared in conventional cages. A total of 500, 28 weeks-old Hy-Line Brown laying hens were evenly assigned to two stocking densities (750 and 500 ㎠/bird). There were 50 replicates of each treatment, each consisting of 750 ㎠/birds (n=6) or 500 ㎠/bird (n=4) birds in a cage, respectively. We observed an increase in the laying period of, the group that was assigned 500 ㎠/bird, however, this group experienced significant feather damage when compared with the group allotted 750 ㎠ bird. There was no effect of stocking densities on egg quality. These results suggest that the 500 ㎠/bird stocking density in the conventional cage can negatively affect feather condition and cause the birds to experience more stress than the group allotted 750 ㎠/bird.

목차 (Table of Contents)

• ABSTRACT
• 서론
• 재료 및 방법
• 결과 및 고찰
• 적요
• REFERENCES

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