Effect of Systems of Lighting and Feed Restriction Timing on Indressing Percentage and some Carcass Characteristics of Japanese Quail (Coturnix japonica)

Abstract

In this study, 960 birds from quail Japanese (576 female and 384 male),were randomly treated to four groups represent lighting systems transactions(continuous lighting, 12, 16 and 18 Lighting hour per day) and four levels of foodrationing schedule (ad libitum، 6 ، 9 and 12 feed) hours/day and with three replicatesper treatment and by 20 birds (12 females and 8 males) for each replicate for thepurpose of studying the effect of different systems of lighting and feed restrictionschedule in dressing percentage and some characteristics carcasses of Japanese quail(Coturnix japonica), study results indicated no significant effect of the lighting systemsin dressing percentage and the relative weight of breast and thigh for both females andmales and study results indicated that the highest relative weight of the liver in femalesand males reared under continuous lighting effect, which was not significantly differentwith my treatment lighting 16 and 18-hour light/per day in females, while there was nosignificant different of lighting systems in the relative weight of the heart and gizzard infemales and males and recorded the treatment of continuous lighting the highestpercentage abdominal fat pad in females and males, either for the impact of feedrestriction schedule factor has been found that of female quail reared under ad libitumfeeding and nutrition for 12 hours/day higher carcass for females and males wererecorded carcass of birds that gave her fodder for 6 and 9 hours/day higher relativeweight of deterministic thigh in the carcass of female and male, while there were nosignificant differences for the relative weight of the breast in females were observedwhile of male quail recorded reared under ad libitum feeding higher relative weight tothe breast, and male and female registered reared under free feeding highest relativeweight of the liver and gizzard while there were no significant differences in therelative weight of the heart, spleen and bursa gland although higher relative weight toabdominal fat pad record in females and males reared under ad libitum feeding effect.