連続明または暗条件および絶食が鶏の盲腸糞排泄におよぼす影響(鶏の盲腸機能に関する研究-12-)
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概要
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The excretion of cecal feces was investigated in 60-day-old Single Comb White Leghorn cockerels kept under continuous lighting or darkness and treated with fasting. The results obtained were as follows: 1. The peak of cecal feces excretion of control birds which were kept under natural light was maximum from 4:00 to 4:59 and followed by miror peaks at 10:00 and 15:00, but no excretion was observed during the night time. 2. The pattern of cecal feces excretion from 24 to 72 hours after the onset of fasting was similar to that in cockerels with normal feeding. The amount of cecal feces excreted by the fasted birds was about one-half of those fed normally. The frequency of cecal feces excretion was not changed by the fasting treatment. 3. Under the continuous lighting, the excretion of cecal feces was observed during 24 hours and the amount of excretion of both rectal and cecal feces increased, while the frequency of the excretion was similar to that of the controls. 4. In the birds kept under continuous darkness a peak of cecal feces excretion was observed between 10:00 and 12:00, and the amount of cecal feces per excretion was larger than that of the controls. The frequency of cecal feces excretion of birds under continuous darkness was approximately one-half of that of the controls. 5. The time course changes in volume of cecal contents were smaller in fasted birds than in normally fed birds, but the excretion pattern was unchanged by the fasting.
- 公益社団法人 日本畜産学会の論文
公益社団法人 日本畜産学会 | 論文
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