Effect of dietary yeast autolysate on performance, slaughter, and carcass characteristics, as well as blood parameters, in quail of both genders

This study was conducted ta determine the effects of dietary yeast autolysate (Saccharomyces cerevisiae) on performance, slaughter and carcass characteristics, as well as blood parameters, in Japanese quail of both genders. A total of 1000 (500 males and 500 females) one-day-old Japanese quail (Coturnix coturnix japonica) were randomly allocated ta one control group and four dietary groups (supplemented with 1, 2, 3, and 4% yeast autolysate) per gender, each containing 100 quail. Each dietary group was then divided into five replicate groups of 20 chicks. During the study (from 1 st ta 42nd day), quails fed dietary treatments supplemented with yeast autolysate had higher live bodyweight (LBW) and average daily live weight gain (ADG) than the control group, and the dietary supplementation of 2% yeast autolysate reduced feed intake (Fi) and feed conversion rate (FCR) far both genders. The highest carcass yield was observed in trial 1 % in male quail (P <0.01 ), and the control of female (P <0.05). The lowest abdominal fat percentage was observed in trial 1 % and 2% of male (P <0.05), and trials 2% and 3% in female quail (P <0.01). The highest breast percentage was observed in the trial 2% of female quail. Cholesterol was significantly lower in trial 2% of male (P <0.001) on day 42. Additionally, aspartate aminotransferase (AST) (P <0.001 ), alkaline phosphatase (ALP) (P <0.001) and albumin (ALB) (P