Effects of Acute Moderate Ambient Temperatures on Behavior, Physiology, Serum Biochemical Indices and Avian Uncoupling Protein mRNA Expression of Broilers

LI Xiang, SHI Yuxiang, FENG Jinghai, LI Meng, ZHOU Ying, ZHANG Minhong

doi:10.3969/j.issn.1006-267x.2017.03.007

2017 , Vol. 29 >Issue 3: 776 - 785

DOI: https://doi.org/10.3969/j.issn.1006-267x.2017.03.007

Molecular Nutrition

Effects of Acute Moderate Ambient Temperatures on Behavior, Physiology, Serum Biochemical Indices and Avian Uncoupling Protein mRNA Expression of Broilers

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1. State key laboratory of Animal Nutrition, lnstitute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China;
2. College of Agriculture, Univerity of Engineering, Handan 056021, China;
3. College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China

Received date: 2016-09-01

Online published: 2017-03-09

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Abstract

This study was conducted to investigate the effects of acute moderate ambient temperatures on behavior, physiology, serum biochemical indices and avian uncoupling protein (avUCP) mRNA expression of broilers. One hundred 26-day-old Arbor Acres (AA) broilers were allotted into five environment chambers (20, 23, 26, 29 and 32℃ groups), and each chamber contained one cage with twenty birds (with ten males and ten females). The pre-test period lasted for 7 days and broilers were kept at 21℃ and 60% relative humidity. When broilers were 34-day-old, the temperature of five environment chambers were regulated to 20, 23, 26, 29 and 32℃ within one hour, respectively, while maintaining the relative humidity at 60% and both kept 2 hour. The results showed as follows:1) compared with the 20℃ group, the feeding frequency of broilers in 29 and 32℃ groups was significantly reduced (P<0.05), the drinking frequency of broilers in 23, 26, 29 and 32℃ groups had no significant difference (P>0.05), and the standing frequency of broilers in 23, 26, 29 and 32℃ groups was significantly reduced (P<0.05). 2) Compared with the 20℃ group, the sitting resting frequency of broilers in 26, 29 and 32℃ groups was significantly reduced (P<0.05), the stretching resting frequency of broilers in 23, 26 and 32℃ groups was significantly reduced (P<0.05), and the prostrating resting frequency of broilers in 29 and 32℃ groups was significantly increased (P<0.05). 3) Compared with the 20℃ group, the core body temperature and respiratory frequency of broilers in 26, 29 and 32℃ were significantly increased (P<0.05), the skin temperature of comb, earlobe, leg and flipper of broilers in 23, 26, 29 and 32℃ groups was significantly increased (P<0.05), and the eyelid skin temperature of broilers in 26, 29 and 32℃ groups was significantly increased (P<0.05). 4) Compared with the 20℃ group, the serum glucose (GLU) content of broilers in 29 and 32℃ groups was significantly decreased (P<0.05), and the serum triglyceride (TG) content of broilers in 26, 29 and 32℃ groups had significantly decreased (P<0.05), the serum total cholesterol (TC) content of broilers in 23, 26, 29 and 32℃ groups was no significant difference (P>0.05). 5) Compared with the 20℃ group, the avUCP mRNA expression in pectoral of broilers in 23, 26, 29 and 32℃ groups was significantly decreased (P<0.05), while the avUCP mRNA expression in liver of broilers in 32℃ group was significantly increased (P<0.05). In conclusion, acute moderate temperatures 2 h, broilers start chemical regulation at 23℃, and increase core body temperature at 26℃.

Key words： acute moderate ambient temperature; broilers; behavior; avian uncoupling protein

Cite this article

LI Xiang, SHI Yuxiang, FENG Jinghai, LI Meng, ZHOU Ying, ZHANG Minhong . Effects of Acute Moderate Ambient Temperatures on Behavior, Physiology, Serum Biochemical Indices and Avian Uncoupling Protein mRNA Expression of Broilers[J]. Chinese Journal of Animal Nutrition, 2017 , 29(3) : 776 -785 . DOI: 10.3969/j.issn.1006-267x.2017.03.007

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