scholarly journals Effects of body weight and feed allocation during sexual maturation in broiler breeder hens. 2. Ovarian morphology and plasma hormone profiles

1999 ◽  
Vol 78 (5) ◽  
pp. 629-639 ◽  
Author(s):  
RA Renema ◽  
FE Robinson ◽  
JA Proudman ◽  
M Newcombe ◽  
RI McKay
Keyword(s):  
Body Weight ◽  
Sexual Maturation ◽  
Broiler Breeder ◽  
Breeder Hens ◽  
Ovarian Morphology ◽  
Broiler Breeder Hens ◽  
Plasma Hormone

scholarly journals The Influence of Stocking Density on Body Weight, Egg Weight, and Feed Intake of Adult Broiler Breeder Hens

2007 ◽  
Vol 86 (8) ◽  
pp. 1615-1619 ◽  
Author(s):  
B.J. Mtileni ◽  
K.A. Nephawe ◽  
A.E. Nesamvuni ◽  
K. Benyi
Keyword(s):  
Body Weight ◽  
Feed Intake ◽  
Stocking Density ◽  
Egg Weight ◽  
Broiler Breeder ◽  
Breeder Hens ◽  
Broiler Breeder Hens

Effects of chronic progesterone injection on performance, plasma hormones and ovarian morphology of feed-satiated and fed restricted broiler breeder hens

2009 ◽  
Vol 2009 ◽  
pp. 204-204
Author(s):  
M Zaghari ◽  
R Taherkhani ◽  
S Honarbakhsh
Keyword(s):  
Single Injection ◽  
Plasma Metabolites ◽  
Broiler Breeder ◽  
Positive Effects ◽  
Breeder Hens ◽  
Chronic Dose ◽  
Ovarian Morphology ◽  
Broiler Breeder Hens ◽  
Chronic Injection ◽  
Plasma Hormones

Single injection of chronic dose of P4 in laying hens during the preovulatory open period has been shown to have positive effects on inducing a preovulatory LH surge and ovulation (Johnson et al., 1985). However, chronic injection of P4 has been shown to increase baseline concentrations of P4 and result in arrested laying and disrupted distribution of hierarchical follicles in turkeys (Bacon and Liu, 2004). The current study was designed to examine the effects of a simulated progesterone surge (by injection of chronic dose of P4) on broiler breeder hens performance, ovary morphology, plasma metabolites and hormones concentrations in either feed-satiated or feed-restricted hens.

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

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