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首页> 外文期刊>Journal of Thermal Biology >The effect of thermal manipulations during the development of the thyroid and adrenal axes on in-hatch and post-hatch thermoregulation
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The effect of thermal manipulations during the development of the thyroid and adrenal axes on in-hatch and post-hatch thermoregulation

机译：甲状腺和肾上腺轴发育过程中热操纵对孵化中和孵化后温度调节的影响

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摘要

This study aimed to elucidate the effects of thermal manipulation (TM) during the development and maturation of the thyroid and adrenal axis on broiler chicks hatchability and thermoregulation during hatch, and to evaluate the improvement of thermotolerance acquisition of TM chicks by thermally challenging them post-hatch. Fertile Cobb eggs were divided into three treatments: control, 12 and 24 H. The control eggs were incubated under standard conditions, whereas the 12 and 24H eggs were incubated from 7 d of incubation (E7) until E16 (inclusive) at 39.5 degrees C and 65% RH for 12 h/d (12 H) or continuously (24 H). Hatchability, BW and quality of the hatched 24 H chicks were negatively affected, but exhibited significantly improved thermotolerance on heat stress at 3 and 10d of age for males and females, respectively. It can be concluded that continuous TM during embryogenesis impaired broiler chick performance, but improved their ability to thermoregulate in response to thermal challenge mainly by reducing heat production. (C) 2008 Elsevier Ltd. All rights reserved.
机译：这项研究旨在阐明在甲状腺和肾上腺轴发育和成熟过程中热操纵（TM）对肉仔鸡孵化率和孵化过程中温度调节的影响，并通过在热应激后对它们进行热挑战来评估对TM雏鸡耐热耐受性的改善。孵化。可育Cobb卵分为三种处理：对照，12和24H。对照卵在标准条件下孵育，而12和24H卵在39.5摄氏度的孵育（E7）到E16（包括E7）之间孵育7天。相对湿度为65％的情况持续12 h / d（12 H）或连续（24 H）。孵化的24 H雏鸡的孵化率，体重和质量受到负面影响，但在雄性和雌性3d和10d时表现出显着改善的热应激耐热性。可以得出结论，在胚胎发生过程中连续的TM会损害肉鸡的生长性能，但主要通过减少热量产生来提高其对热挑战的温度调节能力。 （C）2008 Elsevier Ltd.保留所有权利。

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