scholarly journals Body composition and reproductive performance at entry into lay of anno 1980 versus anno 2000 broiler breeder females under fast and slow release from feed restriction

2014 ◽  
Vol 93 (5) ◽  
pp. 1227-1235 ◽  
Author(s):  
Y. Eitan ◽  
Ehud Lipkin ◽  
M. Soller
Keyword(s):  
Body Composition ◽  
Reproductive Performance ◽  
Slow Release ◽  
Feed Restriction ◽  
Broiler Breeder

Reproductive performance, growth rate and body composition of full-fed versus feed-restricted broiler breeder hens

1991 ◽  
Vol 71 (2) ◽  
pp. 549-556 ◽  
Author(s):  
F. E. Robinson ◽  
N. A. Robinson ◽  
T. A. Scott
Keyword(s):  
Reproductive Performance ◽  
Feed Restriction ◽  
Embryo Viability ◽  
Broiler Breeder ◽  
Breeder Hens ◽  
Broiler Breeder Hens ◽  
Indian River ◽  
Prime Sequence ◽  
Ad Libitum ◽  
Ad Libitum Feeding

The effects of ad libitum versus restricted feeding during the period from 22 to 62 wk of age were examined in 60 individually-housed Indian River broiler breeder hens. Body weight of 30 ad-libitum-fed hens was approximately 700 g heavier than that of 30 restricted hens throughout most of the laying period. Mean egg output was lower in ad-libitum-fed hens (136.2 eggs) compared to restricted hens (176.6 eggs). A similar number of laying sequences (defined as consecutive days of laying) were observed in both groups of hens; however, the mean length of the prime sequence was 24.4 d for the restricted hens compared to 14.9 d for the ad-libitum-fed hens. Ad-libitum-fed hens had a higher incidence of intersequence pauses of greater than 11 d duration compared to restricted hens. Feed restriction did not improve fertility, embryo viability, or embryo production of eggs incubated for a period of 7 d. At 62 wk of age the carcasses of the restricted-fed hens contained on average 901 g of fat while the carcasses of the ad-libitum-fed hens contained 1270 g of fat. Ad libitum feeding reduced reproductive performance by reducing the length of the prime sequence and by increasing the number of long intersequence pauses. Key words: Broiler breeder hens, full-feeding, feed restriction, obesity, reproductive performance

Reproductive performance, growth rate and body composition of broiler breeder hens differing in body weight at 21 weeks of age

1991 ◽  
Vol 71 (4) ◽  
pp. 1223-1231 ◽  
Author(s):  
F. E. Robinson ◽  
N. A. Robinson
Keyword(s):  
Body Composition ◽  
Body Weight ◽  
Reproductive Performance ◽  
High Weight ◽  
Embryo Viability ◽  
Broiler Breeder ◽  
Breeder Hens ◽  
Low Weight ◽  
Broiler Breeder Hens ◽  
Medium Weight

The effects of variation in body weight at 21 weeks of age on subsequent growth rate, body composition and reproductive performance were studied in broiler breeder hens from 22 to 62 weeks of age. Pullets were sorted into three groups on the basis of body weight (low, medium and high) at 21 weeks of age. Pullets of the low-weight group contained a greater percentage of carcass water and less carcass fat at 22 weeks of age than did the medium- and high-weight pullets, and less carcass protein than the high-weight birds. The relative difference in body weight between the three groups of hens was maintained to 62 weeks of age, the high-weight hens being heavier than the low- and medium-weight hens at the end of the study. The low-weight birds began to lay later than the medium- and high-weight pullets. The low- and medium-weight birds were lighter in weight compared to the high-weight pullets at sexual maturity. Total egg output was lower in the low-weight hens than in the medium- and high-weight hens. No difference was seen in sequence and intersequence pause parameters or in fertility, embryo viability or embryo production between the three groups of hens. On a percentage basis, there were no differences in body composition between groups of birds at 62 weeks of age. It was concluded that pullets which are underweight at 21 weeks of age exhibit a poorer production record than do pen-mates which are of normal or greater than normal body weight. Key words: Broiler breeder hens, egg production, body weight, body composition, sequence length, fertility, embryo viability

scholarly journals Effect of dietary amino acid density on broiler breeder reproductive performance

2019 ◽  
Vol 98 (5) ◽  
pp. 2072-2079 ◽  
Author(s):  
S. Cerrate ◽  
J.T. Halley ◽  
A. Corzo ◽  
B.I. Fancher
Keyword(s):  
Amino Acid ◽  
Reproductive Performance ◽  
Broiler Breeder ◽  
Dietary Amino Acid
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