scholarly journals Relationship of Time of Feeding and Strain to Egg Shell Quality and Hatchability in Broiler Breeders

1988 ◽  
Vol 67 (4) ◽  
pp. 538-543 ◽  
Author(s):  
J. BRAKE
Keyword(s):  
Broiler Breeders ◽  
Shell Quality ◽  
Egg Shell ◽  
Time Of Feeding ◽  
Relationship Of

scholarly journals Effect of Different Levels of Calcium, Phosphor and Vitamin D3 with Fennel Extract on, Performance and Egg Shell Quality in Post Molted Ross Broiler Breeders

2017 ◽  
Vol 8 (15) ◽  
pp. 33-41
Author(s):  
Mohamad Kazemifard ◽  
Hasan Kermanshahi ◽  
Mansour Rezaei ◽  
Abolghasem Golian ◽  
Seyed Javad Hosseini
Keyword(s):  
Vitamin D3 ◽  
Broiler Breeders ◽  
Shell Quality ◽  
Egg Shell ◽  
Different Levels

scholarly journals Effect of hen age, environmental temperature, and oviposition time on egg shell quality and egg shell and serum mineral contents in laying and broiler breeder hens

2014 ◽  
Vol 59 (No. 9) ◽  
pp. 435-443 ◽  
Author(s):  
E. Tůmová ◽  
R.M. Gous ◽  
N. Tyler
Keyword(s):  
Mineral Content ◽  
Laying Hens ◽  
Quality Characteristics ◽  
Broiler Breeders ◽  
Mineral Concentration ◽  
Mineral Contents ◽  
Broiler Breeder ◽  
Shell Quality ◽  
Higher Temperature ◽  
Egg Shell

The aim of the study was to evaluate egg shell quality characteristics, mineral content in the egg shell, and serum mineral concentration during the egg formation process as influenced by oviposition time and ambient temperature at the beginning and end of the laying cycle in laying hens and broiler breeders. Egg shell quality deteriorated significantly at the higher temperature and was lower in broiler breeders than in laying hens. The Ca (P = 0.047) and P (P = 0.018) contents of the egg shell were significantly higher at the higher temperature. The highest (P = 0.028) shell Ca content (352 g/kg) was in eggs laid in the morning, but the highest P (P = 0.030; 1.43 g/kg) and Mg (P = 0.001; 3.88 g/kg) contents were in eggs laid in the afternoon. Broiler breeder egg shells contained significantly more P (P = 0.004) and Mg (P = 0.001) than did those from laying hens. Serum Ca and P levels remained constant throughout the day whereas serum Mg and Zn levels decreased, the rate of decrease in Zn content being the same in all treatments, but with the amounts being greater in laying hens than broiler breeders. The results demonstrate that shell quality characteristics are more severely affected by different factors implemented in this trial compared to the shell mineral composition and especially compared to the serum mineral content.  

Egg Shell Quality Assessment–Do We Need Multiple Records?

2017 ◽  
Author(s):  
Anna Wolc ◽  
Jesus Arango ◽  
Petek Settar ◽  
Neil P. O'Sullivan ◽  
Jack C. M. Dekkers
Keyword(s):  
Quality Assessment ◽  
Shell Quality ◽  
Egg Shell

scholarly journals Dual-Purpose Poultry in Organic Egg Production and Effects on Egg Quality Parameters

Foods ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 897
Author(s):  
Marianne Hammershøj ◽  
Gitte Hald Kristiansen ◽  
Sanna Steenfeldt
Keyword(s):  
Egg Production ◽  
Egg Quality ◽  
Quality Parameters ◽  
Egg Laying ◽  
High Yield ◽  
Meat Production ◽  
Dual Purpose ◽  
Shell Quality ◽  
Egg Shell ◽  
Genotype A

Egg laying genotypes have been selected for generations due to their high yield and egg quality, resulting in efficient feed utilization and low body weight; hence, they are not suitable for meat production. This imposes an issue for the male layer chicks, which are killed at one day old. Because of ethical and food waste concerns, the search for suitable dual-purpose genotypes in order to avoid euthanasia of male day-old chicks has intensified. The aim of the present study is to evaluate potential dual-purpose genotypes for their egg quality compared to a representative egg laying genotype. Three dual-purpose genotypes with divergent characteristics were evaluated: genotype A represented an experimental crossbreed based on a broiler type male and an egg layer female, genotype B was a pure breed, and genotype C was a crossbreed of a layer type. These were compared to a control genotype D, which was an egg layer. Eggs were collected six times during the period of 21–54 weeks of hen age, i.e., a total of 1080 shell eggs were analyzed. Examined parameters were weights of egg, shell, yolk, and albumen, by calculating their relative proportions. Shell quality was assessed by shell strength, shell stiffness, and shell thickness. Yolk quality was determined as yolk color and inclusions of blood and meat spots, and albumen quality was evaluated in terms of pH and dry matter (DM) content. The egg layer genotype produced the smallest eggs with least blood and meat spot inclusions compared to that produced by the three dual-purpose genotypes. Shell quality was superior for the layer genotype. However, the experimental genotype A laid eggs of comparable shell quality, albumen DM, and yolk weight, but also with the darkest and most red-yellow colored yolk. The two other dual-purpose genotypes produced eggs of low-medium quality. In conclusion, the genotype A could serve as dual-purpose genotype from an egg quality perspective.

HOW TO INCREASE OVER-EATEN HENS PRODUCTIVITY AND EGG SHELL QUALITY

2021 ◽  
Vol 23 (2) ◽  
pp. 52-54
Author(s):  
T.M. Okolelova ◽  
◽  
S.V. Yengashev ◽  
S.A. Izmailova ◽  
◽  
...  
Keyword(s):  
Shell Quality ◽  
Egg Shell

Nutritional and environmental factors involved in egg shell quality of laying hens

1992 ◽  
Vol 33 (4) ◽  
pp. 781-794 ◽  
Author(s):  
J. Grizzle ◽  
M. Iheanacho ◽  
A. Saxton ◽  
J. Broaden
Keyword(s):  
Environmental Factors ◽  
Laying Hens ◽  
Shell Quality ◽  
Egg Shell
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