Are Thirty-Five Days Enough to Observe the Stress-Reducing Effect of a Semiochemical Analogue on Chickens (Gallus gallus domesticus) Housed Under High Density?

Madec I.; Gabarrou J.; Guillaumey D.; Lecuelle C.; Bougrat L.; Pageat P.

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Are Thirty-Five Days Enough to Observe the Stress-Reducing Effect of a Semiochemical Analogue on Chickens (Gallus gallus domesticus) Housed Under High Density?

机译：在高密度饲养的鸡（鸡（Gallus domesticus domesticus））上，三十五天是否足以观察到一种化学信息类似物对应激的缓解作用？

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Two similar 400-mpo buildings, each housing 8,400 broilers of a commonly used industrial strain, were used to test the effectiveness of the semiochemical treatment known as mother hen uropygial secretion analogue (MHUSA). The birds in 1 building were exposed to MHUSA continuously during a 35-d growing period, whereas those in the other building received a placebo. The experiment was then repeated using precisely the same conditions but with the building treatment reversed to control for any building effect. The purpose of the trial was to evaluate the effect of MHUSA on growing performances (live weights) and stress indicators observed from blood samples: heterophil-lymphocyte ratio and corticosterone level. Data analysis (ANOVA) showed that MHUSA-treated broilers had a higher mean growth rate, as shown by increased live weights at both d 17 and 35 (P <= 0.001 and P <= 0.001, respectively). After the 35-d growing period, we observed both lower heterophil-lymphocyte ratio (P <= 0.001) and lower corticosterone level (P <= 0.05) for birds treated with MHUSA compared with placebo, further indicating that the birds were less stressed. We conclude that constant diffusion of MHUSA in buildings used to house broilers might enhance the welfare and growth of the bird by reducing stress.

机译：两座相似的400平方米建筑物，每座可容纳8400头常用工业品肉鸡，用于测试称为母鸡尿分泌类似物（MHUSA）的化学信息处理的有效性。一栋大楼中的鸟类在35天的生长期连续暴露于MHUSA，而另一栋大楼中的鸟类则接受了安慰剂。然后在完全相同的条件下重复实验，但逆转建筑处理以控制任何建筑效果。该试验的目的是评估MHUSA对生长性能（活重）和从血样中观察到的应激指标的影响：异源性-淋巴细胞比和皮质酮水平。数据分析（ANOVA）显示，用MHUSA处理的肉鸡平均生长率更高，如在d 17和35 d活重增加（分别为P <= 0.001和P <= 0.001）所示。在35天的生长期后，我们观察到与安慰剂相比，MHUSA治疗的鸟类的异种淋巴细胞比率（P <= 0.001）和皮质酮水平（P <= 0.05）均较低，这进一步表明这些鸟类的压力较小。我们得出的结论是，MHUSA在用于饲养肉鸡的建筑物中不断扩散可能会通过减轻压力来提高禽类的福利和生长。

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《Poultry Science》 |2008年第2期|共4页
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Madec I.; Gabarrou J.; Guillaumey D.; Lecuelle C.; Bougrat L.; Pageat P.;
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1. Are Thirty-Five Days Enough to Observe the Stress-Reducing Effect of a Semiochemical Analogue on Chickens (Gallus gallus domesticus) Housed Under High Density? [J] . Madec I., Gabarrou J., Guillaumey D., Poultry Science . 2008,第2期

机译：在高密度饲养的鸡（鸡（Gallus domesticus domesticus））上，三十五天是否足以观察到一种化学信息类似物对应激的缓解作用？
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Are Thirty-Five Days Enough to Observe the Stress-Reducing Effect of a Semiochemical Analogue on Chickens (Gallus gallus domesticus) Housed Under High Density?

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