Effect Of Length Of Lay Of Nigeria Indigenous Chickens On Their Egg Composition And Shell Quality

2021 ◽  
Vol 19 ◽  
pp. 95-100
Author(s):  
V. E. Olori ◽  
E. B. Sonaiya
Keyword(s):  
Surface Area ◽  
Shell Thickness ◽  
Egg Size ◽  
Shape Index ◽  
Shell Weight ◽  
Egg Weight ◽  
Shell Quality ◽  
Egg Shape ◽  
Egg Composition ◽  
Whole Egg

Three hundred and thirty eggs collected from the second to the seventh month of production, from a flock of the Nigeria indigenous (NI) chickens, were analysed to determine the effect of the length of lay on egg composition and shell quality. The weights of the whole egg and its components as well as shell thickness were measured monthly while the proportion of the various components; egg shape index, shell density and shell weight per surface area were calculated. The results showed that egg weight, albumen weight and % albumen increased (P<0.05) with length of lay by 2.6g, 3.5g, 3.5g and 5.6% respectively between 2nd and 7th months. The change in the weight of the yolk, shell and egg shape index was not significant (P>0.05) between the 2nd and 7th months while % yolk, % shell, shell thickness and the shell weight per surface area decreased (P<0.05) by 4.2%, 0.64%, 0.04mm and 0.003g respectively within the same period. Strong phenotypic correlations were observed between the weights of the whole egg and the albumen (r=0.81), shell (r=0.63) and yolk (r=0.46) and also between shell thickness and its weight per surface area (r=0.81). These results indicate that egg size increased as the NI hen advanced in lay. Eggs laid in the 6th and 7th months contained more albumen than those laid earlier and the shell thickness decreased as the hens advanced in lay thus making them more liable to breakage.

scholarly journals Analysis of the relations between some physicalindicators of market eggs  

2011 ◽  
Vol 57 (Special Issue) ◽  
pp. S1-S6
Author(s):  
R. Gálik ◽  
Z. Poláková ◽  
Š. Boďo ◽  
M. Denker
Keyword(s):  
Shell Thickness ◽  
Statistical Significance ◽  
Shape Index ◽  
Statistical Dependence ◽  
Shell Weight ◽  
Egg Weight ◽  
P Values ◽  
Significant Dependence ◽  
Independent Variable ◽  
Mutual Relations

The paper discusses the relations between some physical indicators of market eggs of laying hens housed in conventional and enriched cage batteries. The measured results were evaluated by the multiple regression dependence method. They show that in the case of both the conventional as well as the enriched cages a statistically significant dependence exists between the eggshell deflection (dependent variable) and thickness, or the force needed for the eggshell destruction (independent variable). The respective P values are given in brackets (0.002 &lt; 0.05; 0.03 &lt; 0.05; 1.16 &times; 10<sup>&ndash;10 </sup>&lt; 0.05; 8.31 &times; 10<sup>&ndash;4 </sup>&lt; 0.05); in the case of the conventional cage and enriched cage also a statistically significant dependence existed (3.81 &times; 10<sup>&ndash;91 </sup>&lt; 0.05; 3.86 &times; 10<sup>&ndash;81</sup>; 1.27 &times; 10<sup>&ndash;97 </sup>&lt; 0.05; 3.46 &times; 10<sup>&ndash;57 </sup>&lt; 0.05) between the shell weight (dependent variable) and shell thickness, or egg weight (independent variable); in the conventional cage, statistical dependence also occurred between the eggshell weight and egg shape index, (1.07 &times; 10<sup>&ndash;6 </sup>&lt; 0.05), in the enriched cage this was on the verge of statistical significance (0.062 &gt; 0.05); if in the conventional cage the eggshell thickness was increased by 1 mm, the shell deflection decreased by 0.08 mm,and if the force necessary for the eggshell destruction was increased by 1 N, the shell deflection decreased by 0.0003 mm; if in the conventional cage the shell thickness was increased by 1 mm, the shell weight increasee by 15.509 g and if the egg weight was increased by 1 g, the shell weight increased by 0.061 g. Our work brings further knowledge concerning the monitored characteristics and their mutual relations.

scholarly journals Quality of eggs from pasture rearing layers of different genotypes

2020 ◽  
Vol 36 (2) ◽  
pp. 181-190
Author(s):  
Zdenka Skrbic ◽  
Milos Lukic ◽  
Veselin Petricevic ◽  
Snezana Bogosavljevic-Boskovic ◽  
Simeon Rakonjac ◽  
...  
Keyword(s):  
Shell Thickness ◽  
Egg Quality ◽  
Egg Yolk ◽  
Vegetation Period ◽  
Shape Index ◽  
Quality Parameters ◽  
Egg Weight ◽  
Naked Neck ◽  
Quality Properties ◽  
Shell Quality

The comparison of physical quality properties of table eggs of commercial hybrid Tetra SL and two native indigenous breeds of hens, Banat Naked Neck and Svrljig hen, was performed in conditions of alternative production in the pasture system in portable cages without the floor. The experiment was conducted during the vegetation period, at the age of hens of 53-57 weeks. In order to produce good quality eggs, the diet was designed with a complete mixture based on maize and soybean. In addition, constant availability of pastures was ensured. Egg sampling was performed in the morning and the initial egg quality was examined based on egg weight, shape index, egg white, egg yolk and shell quality parameters. Layer hens of the commercial hybrid Tetra SL had significantly higher egg weight and better internal egg quality (p<0.01) compared to hens of Banat Naked Neck and Svrljig hens, except for the colour of the yolk, which was more intense in the same feeding and breeding conditions and the age of laying hens, in eggs of native breeds (p<0.01). Native breeds in relation to the commercial hybrid had lighter shell colour (p<0.01). Deformation and egg shell thickness differed (p<0.01) between all three genotypes. The determined rank of layer hen genotypes for shell thickness was: Tetra SL, Banat Naked Neck, Svrljig hen. However, the breaking force was without statistically confirmed difference between hen genotypes.

scholarly journals Beç Tavuklarında (Numida meleagris) Yumurta Şekil İndeksinin Yumurta Kalitesine Etkileri

2016 ◽  
Vol 4 (9) ◽  
pp. 758 ◽  
Author(s):  
Sezai Alkan ◽  
Taki Karslı ◽  
İsmail Durmuş ◽  
Kemal Karabağ
Keyword(s):  
Surface Area ◽  
Egg Quality ◽  
Shape Index ◽  
Quality Characteristics ◽  
Unit Surface Area ◽  
Egg Volume ◽  
Egg Weight ◽  
Egg Shape ◽  
Unit Surface ◽  
Haugh Unit

The aim of this study was to investigated the effects of the egg shape index on egg quality characteristics in Guinea fowl. For this, the eggs were classified in terms of egg shape index, as ≤ 75, < 76 -77 > and ≥ 78. A total of 100 Guinea fowl eggs were evaluated to determine the egg quality traits ( egg weight, eggshell thickness, eggshell surface area, eggshell weight per unit surface area, eggshell ratio, albumen index, albumen ratio, yolk index, yolk ratio, yolk/albumen ratio, haugh unit and egg volume). In this study, eggshell thickness, eggshell weight per unit surface area, eggshell ratio, albumen index, albumen ratio, yolk index, yolk ratio, yolk/albumen ratio and haugh unit were not significantly affected by egg shape index groups. Whereas egg weight, eggshell surface area and egg volume were significantly affected by egg shape index groups. At the same time, there were found significant relationship between the egg shape index and egg quality traits. Egg shape index was found to be an important factor affecting the egg quality characteristics.

scholarly journals Certain egg quality parameters of gray guinea fowl in extensive rearing

2018 ◽  
Vol 34 (2) ◽  
pp. 207-215
Author(s):  
Marinko Vekic ◽  
Stoja Jotanovic ◽  
Djordje Savic
Keyword(s):  
Shell Thickness ◽  
Egg Quality ◽  
Shape Index ◽  
Quality Parameters ◽  
Guinea Fowl ◽  
Phenotypic Correlation ◽  
Shell Weight ◽  
Egg Weight ◽  
Good Potential

This paper presents results of determination of certain quality parameters and its phenotypic correlation in eggs originated from extensively reared gray variety of Guinea fowl. A total of 150 egg collected by sampling 30 eggs in each of five analyzed laying months were used for egg quality evaluation and statistical analysis by methods of descriptive statistics and simple linear correlation. Average egg weight, shape index and shell thickness was 38.14 g, 76.03% and 0.49 mm, respectively. Average shell, yolk and albumen weight was 5.83, 12.16 and 20.23 g, respectively, and its proportion was 15.23, 32.10 and 52.69%, respectively. Average values of yolk height, diameter, index and color were 16.54 mm, 39.95 mm, 41.50%, and 13.76, whereas values for albumen diameter, index and height as well Haugh units were 59.30 mm, 9.62%, 5.67 mm, and 82.58, respectively. Majority of examined quality parameters showed significant correlation with other parameters. Egg weight was positive correlated (p<0.01) with egg length (0.76) and width (0.92), shape index (0.22), shell thickness (0.60), shell weight (0.81) and proportion (0.44), albumen (0.92) and yolk weight (0.77) and yolk index (0.23), but in negative connection (p<0.01) with yolk proportion (-0.54), yolk/albumen ratio (-0.41) and albumen index (-0.25). Determined egg quality indicated good potential of this species in extensive rearing, which could be improved and used in more favorable rearing conditions.

scholarly journals Produksi Telur Ayam Persilangan Merawang dengan Arab

2019 ◽  
Vol 7 (3) ◽  
pp. 120-122
Author(s):  
N. Widayanti ◽  
S. Darwati ◽  
R. Afnan
Keyword(s):  
Egg Production ◽  
Shape Index ◽  
Feed Conversion ◽  
Egg Weight ◽  
Egg Shape

The egg production of local chiken can be increased by crossing of arab and merawang chicken. This study aimed to observed egg production performances of crossing between merawang x merawangarab (M-MA), merawangarab x merawang (MA-M), merawangarab x merawangarab (MA-MA), arabmerawang x arabmerawang (AM-AM), merawangarab x arab (MA-A), and arab x merawangarab (A-MA). Parameters in this study were egg weight, egg shape index, hen day production and feed conversion. The result showed that the egg weight of MA-M chicken was significantly greater (P<0.05). than M-MA, MA-MA, AM-AM, MA-A, and A-MA chicken. The MA-A egg index was significantly larger (P<0.05) than other crossing. Hen day production of M-MA chicken was significantly greater (P<0.05) and feed convertion was significantly efficient (P<0.05) than other crossing. MA hens had better production than other hens.

COMPARISON OF SEVERAL EGGSHELL CHARACTERISTICS WITH IMPACT RESISTANCE

1976 ◽  
Vol 56 (2) ◽  
pp. 299-304 ◽  
Author(s):  
PETER W. VOISEY ◽  
J. R. HUNT
Keyword(s):  
Unit Area ◽  
Impact Resistance ◽  
Direct Determination ◽  
Shell Weight ◽  
Egg Weight ◽  
Shell Quality ◽  
Precise Prediction ◽  
Prediction Techniques ◽  
Non Destructive

Precise measurements of eggshell resistance to impact fracture were compared with 11 other measurements used to predict shell quality. Shell weight per unit area provided the best prediction, whereas Beta backscatter readings and egg weight were not useful indices of shell strength. Shell deformation and egg specific gravity appeared to be useful non-destructive prediction techniques. However, none of the characteristics, singly or in combination, provided a precise prediction of resistance to impact. It was concluded that only direct determination of the force to break the shell had the potential to precisely measure shell resistance to damage. The force required to fracture eggs under impact was higher than under quasistatic compression. This confirmed that the shell material is strain–rate sensitive.

scholarly journals Estimation of Shell Weight and Shell Thickness from Egg Specific Gravity and Egg Weight

1982 ◽  
Vol 61 (10) ◽  
pp. 1991-1995 ◽  
Author(s):  
JON O. NORDSTROM ◽  
L.E. OUSTERHOUT
Keyword(s):  
Specific Gravity ◽  
Shell Thickness ◽  
Shell Weight ◽  
Egg Weight

scholarly journals Influence of Dry Rum Distillery Slops in Diets for White Leghorn Hens on Laying Rate, Feed Conversion, and Egg Size and Quality

1969 ◽  
Vol 61 (4) ◽  
pp. 465-469
Author(s):  
Manuel Soldevila ◽  
Renato Irizarry
Keyword(s):  
Calcium Metabolism ◽  
Shell Thickness ◽  
Egg Size ◽  
Feed Utilization ◽  
Shell Formation ◽  
White Leghorn ◽  
Feed Conversion ◽  
Egg Weight ◽  
Cane Molasses ◽  
Isocaloric Diets

Balanced (isonitrogenous and isocaloric) diets containing from 0 to 35% dried cane molasses rum distillery slops were compared using individually caged White Leghorn hens of the Kimber strain. When production and feed utilization were compared, a stepwise decrease, more pronounced with levels above 20%, was evident with increases in the slops content of the diets. Eggs were permanently stained and hens markedly soiled when consuming diets with levels of dry slops higher than 15%. Averages of egg weight, hen weight, broken-open egg height (inner quality), and shell thickness were not affected by levels of dry slops as high as 35% in the diets. The high levels of K, Mg, and SO4  present in the experimental diets did not affect the calcium metabolism involved in shell formation.

scholarly journals Egg Morphometry and Eggshell Quality in Ring-Necked Pheasants Kept in Cages / Budowa jaja i jakość skorupy u bażantów obrożnych utrzymywanych w klatkach

2013 ◽  
Vol 13 (3) ◽  
pp. 531-541 ◽  
Author(s):  
Sebastian Nowaczewski ◽  
Tomasz Szablewski ◽  
Renata Cegielska-Radziejewska ◽  
Helena Kontecka
Keyword(s):  
Shape Index ◽  
Yellow Colour ◽  
Shell Quality ◽  
Percentage Points ◽  
Egg Shape ◽  
Colour Parameters ◽  
Colour Saturation ◽  
Eggshell Colour ◽  
Egg Shell

Abstract The aim of the study was to evaluate the morphometry and shell quality of eggs laid by pheasants kept in cages, and also to analyse the dependence between egg shell colour parameters, its quality and morphometric characteristics. Four groups of 15 eggs (60 eggs), each classified according to their eggshell colours, i.e. blue, light brown, dark brown and olive, were examined. The eggs did not differ significantly between each other in their mean weight and olive-coloured eggs had a higher shape index (about 8.91 percentage points) than blue eggs. Blue and light brown coloured eggs had thinner shells than the dark brown eggs (by 33.57 and 27.97 μm, respectively). Blue eggs had the lightest shells (L* = 67.97) and the highest proportion of green colour in their shells since the a* parameter value for blue eggs was negative. A significant positive correlation was observed between the egg shape and the shell colour saturation (C*) and the proportion of yellow colour (b*) in it. In addition, a negative correlation was found between lightness in eggshell colour, its thickness and the egg shape (r = from -0.338* to -0.480**). In comparison with the data obtained from the literature concerning the quality of eggs laid by pheasants kept in aviaries and eggs laid by birds kept in cages, the eggs were described as having similar weights and morphometries along with greater shell thicknesses. Furthermore, our study confirmed that pheasant eggs with blue and light brown colour have poorer shell quality, a fact which has been shown already in earlier research. However, this fact is related to the lightness of the shell pigment rather than its colour.

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