EFFECTS OF STRAY VOLTAGE ON LAYING HABITS OF BROILER BREEDERS

2000 ◽  
Vol 16 (6) ◽  
pp. 723-729 ◽  
Author(s):  
J. W. Worley ◽  
J. L. Wilson
Keyword(s):  
Broiler Breeders ◽  
Stray Voltage

scholarly journals Modelling genetic components of hatch of fertile in broiler breeders

2021 ◽  
pp. 101062
Author(s):  
Bayode O. Makanjuola ◽  
Victor E. Olori ◽  
Raphael A. Mrode
Keyword(s):  
Broiler Breeders ◽  
Genetic Components

scholarly journals Effects of amino acid levels during rearing on Cobb 500 slow-feathering broiler breeders: 1. Growth and development

2021 ◽  
pp. 101327
Author(s):  
Maria Camila Alfaro-Wisaquillo ◽  
Edgar O. Oviedo-Rondón ◽  
Hernan A. Cordova-Noboa ◽  
Justina V. Caldas ◽  
Gustavo A. Quintana-Ospina ◽  
...  
Keyword(s):  
Amino Acid ◽  
Growth And Development ◽  
Broiler Breeders ◽  
Amino Acid Levels

scholarly journals Effects of monobutyrin supplementation on egg production, biochemical indexes, and gut microbiota of broiler breeders

2020 ◽  
Author(s):  
Xin Feng ◽  
Fangang Kong ◽  
Liwei Zheng ◽  
Qien Qi ◽  
Lina Long ◽  
...  
Keyword(s):  
Gut Microbiota ◽  
Egg Production ◽  
Broiler Breeders

scholarly journals Influence of a raised slatted area in front of the nest on leg health, mating behaviour and floor eggs in broiler breeders

animal ◽  
2020 ◽  
pp. 100109
Author(s):  
A.C.M. van den Oever ◽  
L. Candelotto ◽  
B. Kemp ◽  
T.B. Rodenburg ◽  
J.E. Bolhuis ◽  
...  
Keyword(s):  
Mating Behaviour ◽  
Broiler Breeders

scholarly journals Intergenerational Effects of Maternal Growth Strategies in Broiler Breeders

2021 ◽  
pp. 101090
Author(s):  
M. Afrouziyeh ◽  
N.M. Zukiwsky ◽  
Martin J. Zuidhof
Keyword(s):  
Growth Strategies ◽  
Broiler Breeders ◽  
Intergenerational Effects

scholarly journals Modelling the egg components and laying patterns of broiler breeder hens

2016 ◽  
Vol 56 (7) ◽  
pp. 1091 ◽  
Author(s):  
Nayara T. Ferreira ◽  
Nilva K. Sakomura ◽  
Juliano César de Paula Dorigam ◽  
Edney Pereira da Silva ◽  
Robert M. Gous
Keyword(s):  
Egg Production ◽  
Feeding Strategy ◽  
Simulated Data ◽  
Egg Yolk ◽  
Broiler Breeders ◽  
Broiler Breeder ◽  
Reproductive Process ◽  
Breeder Hens ◽  
Laying Performance ◽  
Broiler Breeder Hens

There is scant information about the reproductive process in broiler breeders, with which to develop a feeding strategy that will be economically optimal for these birds. This study aimed to model the egg production of a flock of broiler breeder hens, using non-isometric equations. The number of eggs produced by 60 broiler breeder hens aged 24–60 weeks was monitored, as was the weight of these eggs and the weights of the components, yolk, albumen and shell. Oviposition sequences and the number and length of pauses between sequences were analysed. Non-isometric functions were applied to predict the weight of the egg; yolk weight was predicted from the age of the hen, while albumen and shell weights were predicted from yolk weight; and egg weight was obtained by summing the component weights. The incidence of soft-shelled and double-yolk eggs was also determined. Yolk weight (YW, g) can be described as YW = 18.03 × (1 – e–0.015 × (t – 103.4)) × e(0.001 × t), where t is the age of the bird (days). The weights of albumen (AW) and shell (SW) were based on YW predictions as follows: AW = 14.38 × YW0.375 and SW = 0.358 × (YW + AW)0.687. The rate of double-yolk egg (DY) production is described by DY = 2.28 × e(0.209 × TFE), and the rate of soft-shelled egg (SS) production by SS = 1.126 + 0.148/(1 – 0.024 × TFE) – 0.056 × TFE, as a function of time from first egg (TFE). On the basis of the results obtained, the model developed here is an accurate reflection of the changes that occur in the number of eggs produced by broiler breeders, as well as in the egg itself and in its components over the entire laying period. This model can thus be used in predicting the nutrient requirements of individual broiler breeder hens, which, when combined with simulated data from a large number of individuals, will accurately describe the laying performance of a flock of broiler breeders.

PERFORMANCE OF DWARF BROILER BREEDERS IN LAYING CAGES AND FLOOR PENS AND OF NORMAL BREEDERS IN FLOOR PENS

1975 ◽  
Vol 55 (4) ◽  
pp. 741-747 ◽  
Author(s):  
J. H. STRAIN ◽  
A. P. PILOSKI
Keyword(s):  
Body Weight ◽  
Egg Production ◽  
General Pattern ◽  
Female Offspring ◽  
Male Offspring ◽  
Production Cycle ◽  
Feed Conversion ◽  
Broiler Breeders ◽  
Feed Costs

Dwarf broiler breeders in single-bird cages (DC), in floor pens (DF) and normal broiler breeders in floor pens (NF) were compared for their own and their offspring’s performance. No differences were observed in rate of egg production at 147–329 days of age between the NF and DF birds (48 vs. 47%) whereas the DC birds laid at the rate of 40%. Hen-housed egg numbers for the same period followed the same general pattern (NF, 81; DF, 82; DC, 70 eggs/bird). DF and DC birds consumed less feed per dozen eggs than the NF birds (3.4 vs. 4.3 kg/doz). Egg weights in the early part of the production cycle were not significantly different among the groups but at 294 days of age the normal birds laid larger eggs than the dwarfs (65 vs. 62 g). Dwarfs in cages reached 50% production earlier than the DF or NF birds. Female offspring from the three groups grew at the same rate and weighed 1.7 kg at 56 days of age but there were significant differences in feed conversion (NF, 2.46; DF, 2.43; DC, 2.53 kg/kg body weight produced). Male offspring had small but not statistically significant differences in body weight at 56 days (NF, 2.16; DF, 2.12; DC, 2.09 kg) or feed conversion (NF, 2.30; DF, 2.29; DC, 2.34 kg/kg body weight). Mortality in the offspring ranged from 2.7 to 9.2% but did not differ significantly. Income over feed costs per broiler started did not differ from the three groups regardless of the meat price – feed price combination considered. However, when profit was computed on a breeder hen basis, the DF females were more profitable than either the NF or DC females.

Pathology and Localization of Avibacterium endocarditidis in Experimentally Infected Broiler Breeders

2014 ◽  
Vol 150 (2-3) ◽  
pp. 266-275 ◽  
Author(s):  
B. Horne Møller ◽  
M. Bisgaard ◽  
S.E. Pors
Keyword(s):  
Broiler Breeders
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