scholarly journals The Relationship Between Laboratory Measures of Egg Shell Quality and Breakage in Commercial Egg Washing and Candling Equipment

1985 ◽  
Vol 64 (5) ◽  
pp. 901-909 ◽  
Author(s):  
B.K. THOMPSON ◽  
R.M.G. HAMILTON ◽  
A.A. GRUNDER
Keyword(s):  
Shell Quality ◽  
Egg Shell ◽  
The Relationship ◽  
Laboratory Measures

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

scholarly journals The Structure of the Insect Egg-Shell in Relation to the Respiration of the Embryo

1950 ◽  
Vol 26 (4) ◽  
pp. 327-334
Author(s):  
P. H. TUFT
Keyword(s):  
Rhodnius Prolixus ◽  
Gaseous Exchange ◽  
Insect Egg ◽  
Physical Conditions ◽  
Egg Shell ◽  
Gas Space ◽  
The Relationship ◽  
Sufficient Oxygen

1. The site of gaseous exchange in the eggs of Rhodnius prolixus (Stahl) is shown to be the rim of the cap which covers the anterior end of the egg. Most of the oxygen consumed by the embryo enters the egg through the micropyles and pseudomicropyles which penetrate the shell in this region. 2. The physical conditions necessary for the passage of sufficient oxygen through these pores is discussed. A continuous gas space under the shell--the presence of which can be deduced on theoretical grounds--is shown to exist in the Rhodnius egg. 3. The relationship between waterproofing and the permeability of the shell to oxygen is discussed.

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

Assessing the response of hen weight, body composition, feather score, egg quality, and level of excreta nitrogen content to digestible balanced protein intake of laying hens

2018 ◽  
Vol 98 (4) ◽  
pp. 619-630 ◽  
Author(s):  
D. Kumar ◽  
C. Raginski ◽  
K. Schwean-Lardner ◽  
H.L. Classen
Keyword(s):  
Egg Production ◽  
Diet Composition ◽  
Laying Hens ◽  
Egg Quality ◽  
N Content ◽  
Shell Quality ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Egg Shell ◽  
Level Of Significance

Ideally balanced dietary protein is critical for laying hen egg production and feed efficiency, but also affects other important characteristics. This research was designed to study the nonegg production and feed intake response of Lohmann-LSL Lite hens to 550, 625, 700, 775, and 850 mg d−1 of amino acid balanced digestible lysine (Dlys) from 27 to 66 wk of age. Data collection included hen weight (HW), feather scoring, tissue weights, egg specific gravity, egg component weights, and excreta nitrogen (N) content. The experiment was a completely randomized design and level of significance was fixed at P ≤ 0.05. Hen weight (quadratic, Q), pectoralis muscle (absolute, % – Q), and abdominal fat (absolute – linear, L; % – Q) increased with increasing Dlys intake. Although gastrointestinal segment weights and lengths were affected by Dlys intake, interpretation of results was confounded by other aspects of diet composition. Hen feather score (L) and excreta N content (Q) increased, and egg shell quality (L) decreased with increasing Dlys intake. Absolute egg component weights increased with Dlys intake, but effects on proportional weights were Q and relatively minor. In conclusion, balanced Dlys intake affected a variety of practical nonproduction characteristics in laying hens.

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