止り木の設置がケージ飼育産卵鶏の行動と生産性に及ぼす影響

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書誌事項

タイトル別名
  • Effects of Perches on Behavior and Performance of Caged Hens.
  • 止り木の設置がケージ飼育産卵鶏の行動と生産性に及ぼす影響〔英文〕
  • トマリギ ノ セッチ ガ ケージ シイク サンランケイ ノ コウドウ ト セイ

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説明

The objective of the present study was to compare the behavior and production performance of laying hens housed in cages with and without perches. Thirty-six commercial laying hens were divided into 3 groups of 12 each. They were subjected to the following types of cage with 2 birds per cage (474 cm2/bird), according to the Latin square methods : C, conventional cages without perches ; PN, conventional cages with perches from 20 : 00 to 08 : 00 h ; PD, conventional cages with perches in whole days. Each experimental period consisted of 2 weeks. The proportion of birds resting (not eating, drinking, preening, aggression and walking) in C, PN and PD was 74.3%, 76.6% and 81.3%, respectively. More than 90% of birds resting in PN and PD used the perches during the dark period. In PD, more than 70% of birds resting used the perches in the daytime. The production performance was not affected by the existence of perches. However, as the significant positive transitions from pacing to eating and drinking, and from aggression to eating and vice versa were observed in only PD cages, the perches in the center of cages might prevent hens moving.

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