The Influences of Ambient Temperature and Removal Period of Digesta on the Residual Amounts of Dry Matter in Digestive Tract of Adult Roosters

Body weight of aged roosters was not affected by the different dietary of crude protein and calcium levels ( P0.05). 2.

说明不同粗蛋白和钙水平日粮对成年种公鸡的体重没有明显的影响（P＞0.05）。

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Roosters are territorial creatures and don't much like other roosters trespassing on their land.

公鸡有领地意识，自己的领地“决不许其它公鸡侵犯”。

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And because their internal clocks are sometimes set a bit early, some roosters begin crowing well before sunrise.

又因为公鸡的生理钟有时候设置得早一些，所以，一些公鸡打鸣在日出前。

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Comparative Study of Proteinase Activities and Digestibility of Amino Acids of Feedstuffs Between Roosters and Broiler Chicks

蛋公鸡和肉仔鸡蛋白消化酶活性及饲料氨基酸消化率的比较研究

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The results show that: Effect of Anti-stress agent on breeder roosters intake, the volum.

近年来研究发现铬在抗应激和提高免疫机能上有特殊的作用。

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However, the researchers also noticed that the roosters' sense of time grew worse the longer they stayed in the experiment.

然而研究人员同时观察到，这些公鸡在实验环境中待得越久，它们对时间的敏感度就越弱。

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Roosters greet the rising sun with crowing sound.

公鸡总是以报晓声来迎接朝阳。

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The birds also crowed in response to sudden light, and to the sounds of other roosters.

为了响应突然亮起来的光线和其它公鸡的叫声，公鸡也会鸣叫。

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Japanese researchers say they have proof that an internal clock helps tell roosters when it is time to crow.

日本研究人员表示，他们已经证实有一个内部时钟可以告诉公鸡该何时打鸣。

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GLU content of roosters feeding low protein diet was slightly higher than the other two groups ( P> 0.05).

低蛋白组葡萄糖含量稍高于另两组（P>0.05），甘油三酷含量极显著地高于高蛋白组（P

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They strut around like roosters down here.

在这儿他们象公鸡一样趾高气扬.

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The only complaints in recent years have been that the roosters are too loud.

近年来对他们唯一的不满就是啦啦队的声音太大了。

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Like all birds, roosters call in a daily cycle determined by circadian rhythms.

和其他鸟类一样，生理节律决定了公鸡每天都要打鸣。

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Introduction of dry chick faeces into the diet of young roosters to increase egg production

干燥鸡粪饲料饲喂蛋仔公鸡试验

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Roosters are usually given a break of at least an hour before taking on another opponent.

一般来说，斗鸡在两场比赛之间有至少一小时的休息时间。

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The Impact of the Level of Androgen on the Quality of Sperm in Mature Roosters

文昌鸡血清雄激素水平对精液品质的影响

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Effects of Different Dietary Levels on ND Antibody Titre of Breeder Roosters

不同营养水平对种公鸡新城疫抗体水平的影响

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Then, for two weeks, the roosters lived in constant dim light.

然后，让公鸡持续在微弱的光线中度过两个星期。

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New research says the latter: roosters crow because of internal time cues.

新的研究应证了后一说法：公鸡打鸣是因为“内时钟”。

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Effect of Different Protein Level of Feedstuffs on Endogenous Energy Losses of Roosters

不同蛋白质水平饲料原料对鸡内源能排泄量的影响

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