Short-wavelength light induces broiler’s behavioral and physiological syndrome through a misaligned eating rhythm  

作　　者：Yefeng Yang Qiong Liu Shouyi Wang Li Zeng Chenghao Pan Ahmed Jado Yasser Elhadidi Kai Liu Jinming Pan 

机构地区：[1]Department of Biosystems Engineering,Zhejiang University,Hangzhou 310058,China [2]Department of Agricultural Engineering,Mansoura University,Mansoura 35516,Egypt [3]Department of Infectious Diseases and Public Health,City University of Hong Kong,Hong Kong SAR,China [4]Key Laboratory of Intelligent Equipment and Robotics for Agriculture of Zhejiang Province,Hangzhou 310058,China

出　　处：《International Journal of Agricultural and Biological Engineering》2022年第3期47-54,共8页国际农业与生物工程学报（英文）

基　　金：This work was funded by the National Natural Science Foundation of China(Grant No.31972609);the China Agriculture Research System(CARS-40).

摘　　要：Previous work shows that long-wavelength light has a robust circadian rhythmic pattern in the expression of clock genes of chickens,whereas short-wavelength light leads to an arrhythmic oscillation of some clock genes(e.g.,cClock,cCry1,cCry2,cPer2,and cPer3).However,knowledge about the consequences of LED lights on the physiological and behavioral phenotype was still not clear.This experiment hypothesize that short-wavelength light disturbs chicken’s eating rhythm and leads to a wrong time to eat,resulting in metabolic syndrome.“Meihuang”broilers were housed in monochromatic LED blue light,green light,yellow light,red light,or white light with a very low dose(15 lx).Multiply physiological parameters were measured and the 24-h eating behavior was determined.The effects of LED light on physiological status and behavioral phenotype showed a wavelength-dependent manner.Short-wavelength light significantly decreased the level of total triglycerides and total cholesterol but increased triiodothyronine concentration.Inversely,long-wavelength light increased the triglycerides and total cholesterol and reduced the level of triiodothyronine.Further,it was found that short-wavelength light significantly boosted body weight compared with long-wavelength light,despite equivalent levels of food intake.Short-wavelength light induced 23.4%and 14.1%of food consumption during subjective nights,but long-wavelength light did not.These results imply that when chickens eat mattered,not just what they eat.Thus,low as 15 lx of blue light exposure during the typical dark period is sufficient to leads an individual to eat at“wrong”time,causing metabolic dysfunction.

关 键 词：short-wavelength light BROILER behavior physiology environmental control circadian rhythm intermittent eating 

分 类 号：S83[农业科学—畜牧学]