Effect of Egg Weight and egg Shell Thickness on Hatchability and Embryonic Mortality of Cobb Broiler Breeder Eggs (original) (raw)
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Effect of Egg Weights on Hatching Results, Broiler Performance and Some Stress Parameters
Brazilian Journal of Poultry Science, 2017
The present study was conducted to investigate the effect of hatching egg weight of broiler parent stocks on hatching results, chick performance, carcass characteristics, internal organ weights and some blood stress parameters. Eggs were divided into 3 egg weight groups (55.0 to 60.0 g (light), 60.1 to 65.0 g (medium) and 65.1 to 70.0 g (heavy)) for the experiments. After incubation, mixed-gender broiler chicks from the hatcher were placed into 27 grower pens (2x1 m) with 9 replications for 3 weight groups by using randomized block design. Each pen had 25 broiler chicks. Therefore, 225 chicks were used for each group and 675 chicks in total. The experiment was designed with nine replicates. Chi-square test, variance analysis test and Duncan multiple range test were used during statistical analysis. Hatching egg weight significantly affected egg shell thickness (p=0.042), egg weight loss on 18 th day of incubation (p<0.001), number of healthy chick (p=0.001) and deformed chicks (p=0.003), hatchability (p=0.003), hatchability yield (p=0.002), hatching weight and 7 day chick body weight (p=0.001), fresh carcass yields (p=0.002), and cooled carcass yields (p<0.001), blood triglyceride level (p=0.031), back toe relative asymmetry (p=0.032) and back toe fluctuating asymmetry (p=0.038). It was concluded in the present study that medium-weight eggs yielded better hatching results and the chicks of medium-weight eggs also yielded better outcomes with regards to other investigated parameters.
Effects of egg size (weight) and age on hatching performance and chick quality of broiler breeder
A total of 2000 Hubbard Classic females and 180 males (male to female ratio 1:11) close to standard body weights were selected and managed separately in the same shed. The objective of this experiment was to study the effects of egg size (small, medium and large) at mid (45 weeks) production cycle and flock age (30, 45 and 60 weeks old) on hatching egg weight loss, fertility, hatchability traits, chick weight and chick yield in a commercial Hubbard Classic broiler breeder flock. The results showed that minimum egg weight loss (P ≤ 0.05) was recorded in large egg size group at different incubation periods and egg weight losses decreased with advancing the age of breeder hens. Maximum fertility and hatchability (P ≤ 0.05) was noticed in small egg size group, followed by medium and large egg size groups. However, maximum embryonic mortality (P ≤ 0.05) during incubation and higher percentage of infertile eggs was recorded in large size egg group, followed by medium and small egg size groups. Low fertility, hatchability was recorded (P ≤ 0.05) in older hen at the age of 60 weeks. The chick weight and chick length were amplified (P ≤ 0.05) with increasing the egg size. However, egg size was not influenced (P ≥ 0.05) on chick yield. The chick weight, chick yield and chick length were improved (P ≤ 0.05) with advancing age of broiler breeder.
Effect of egg sizes on egg qualities, hatchability and initial weight of the hatched-chicks
International Journal of Environment, Agriculture and Biotechnology, 2018
The study evaluates the relationship of egg weights with other egg qualities, hatchability and hatchling weights. One thousand eight hundred eggs from marshal broiler chicken were categorized into small (50-59 g), medium (60-69 g) and large (≥70 g) of 600 eggs per group in a completely randomized design. Hundred eggs from each group were subjected to quality analysis and the remaining incubated for hatchlings production. The egg length of of large group was the highest (4.71 cm) and lowest in small (4.22 cm). The relationship revealed 32.86% yolk in small size, while 33.71 and 30.99% was observed for medium and large respectively. Also, albumen ranged from 50.85% in small to 55.38% in large. Hatchability result revealed 74.50% for small egg and reduced as sizes increased. Hatchling weight was highest in large (49.19 g) and lowest in small (38.79 g). The regression equations showed that albumen weight and egg size were best predictors of chick's weight through their R 2 values (0.68 and 0.57 respectively) compared to yolk weight with R 2 of 0.28. It was therefore be inferred that breeder eggs size could affect egg quality parameters and chick's weight.
Effect of Broiler Breeders Age on Hatchability, Candling, Water Loss, Chick Yield and Dead in Shell
Water loss, chick yield and DIS analysis are all important factors in quality investigation of both the chick and hatchery performance. The age of breeders affect the hatchability, egg weight, chick weight water loss, Candling and DIS. In this experiment the broiler breeder were divided into three groups on the basis of age, young (24-30 weeks), prime (31-50 weeks) and old (51+ weeks) to investigate the effects of hatchability , egg weight, chick weight , Water loss, chick yield and DIS along mal-position and mal-formations. Hatchability (81.
Effect of Egg Weight on Pre-Hatch Performance in Broiler Chickens
2016
A study was conducted to determine the effect of egg weight on hatchability and chick weight in CARIBRO Vishal broiler chicken. In the present study a total of 600 eggs were selected and allocated into three treatments 200 each: small (<49g), medium (50-59g), and large (60-69g) and incubated at stranded incubation temperature and humidity. The result showed that hatchability percentage of large sized egg was significantly higher (P<0.05) in compare to medium and small sized eggs, however higher embryonic mortality were recorded in small egg size groups. Percent moisture loss were significantly (P<0.05) higher in small sized egg group. Higher chick weight and lower embryonic mortality was observed in large sized egg group in compared to medium and small sized group.
Primary Audience: Broiler farmers, hatchery managers, broiler breeder farmers, researchers SUMMARY The objective of the present study was to determine the effect of broiler breeder egg weight on egg quality, chick quality, and broiler performance using Hubbard Classic broiler breeder flock. Hatching eggs from a commercial broiler breeder flock (Hubbard classic strain) were obtained at the age of 60 wk and divided into 3 egg-weight categories, namely small, medium, and large. For this purpose, 930 eggs having weights 63.09 ± 0.21, 68.85 ± 0.23, and 74.81 ± 0.11g were divided into 3 egg categories labeled small, medium, and large respectively. We further divided these eggs into 2 categories, eggs for quality parameters and eggs for incubation and posthatch performance parameters. Eggs from the small egg category had greater proportion of the shell weight and more shell strength. Egg weight did not significantly affect the albumen and yolk weight percentage. Egg weight affected the shape index and specific gravity for which lower values were observed for large eggs. Egg weight positively affected the chick weight, chick yield, and chick length (P < 0.05) of both male and female chicks. Results of the body weight gain showed that effect of egg weight on the posthatch performance of chick diminishes with the age of broilers. Egg weight significantly affected the body weight gain of male and female chicks up to 3 wk of age. Egg weights did not significantly affect the feed intake and mortality of broiler. Different egg-weight categories significantly affected the feed conversion ratio of female chicks at wk 2 and 3 of age and did not affect the feed conversion of male and female chicks at the end of wk 5. In conclusion, egg weight positively affected the chick characteristics (e.g., chick weight, chick length) and did not affect the final live body weight, feed conversion ratio, feed intake, and mortality in broilers.
Journal of Agricultural Science and Environment, 2019
This study was designed to evaluate the effects of different Marshal breed broiler on hatching egg weights on hatching characteristics and post-hatch performances; and also to compare the cost of production of hatchlings to table size. A total of 900 hatching eggs (HE) from 40 weeks old parent stock were sorted, graded and purposively grouped on weight basis into small (<50g), medium (50-65g) and large (>65g) sizes (3 groups). Each group was allotted 300 eggs and replicated thrice, with each replicate having 100 eggs in a complete randomised design before incubation for 21 days. Candling of incubated eggs was done on day 18 on group basis and numbers of fertile eggs noted. The chicks were individually weighed and counted to determine hatchability, hatchling weight and cost of production. Thereafter, hatched chicks were allotted into the respective groups and replicated to determine the post-hatch performance. Each replicate has 45 chicks, intensively raised and were fed ad libitum with broiler starter mash for the first 4 weeks of life and broiler finisher mash from 4-8 weeks. Data generated include feed intake, final weight, mortality; weight gain, feed conversion ratio and unit cost of production of chicken were calculated. The data were analyzed by GLM of SAS and Duncan's multiple-range test was used to separate significance of differences among treatment means at 5% significance level. The medium HE had the best fertility (93.00%), hatchability (95.67%) and cost of producing a chick (N 90.07) when compared with the small and large HEs. The large HE has the best results in terms of, final weight and weight gain, while medium HE has the best FCR, lowest mortality and least cost of production, which are significant at p< 0.05. It is therefore recommended poultry breeders and hatchery operators should consider the use of medium weight (50-65g) HEs in their operations, so as to cut down the production cost.
Effect of Incubation Duration on Broiler Breeder Eggs Hatchability and Post-Hatch Performance
Journal of Animal Health and Production, 2017
Incubation duration is most important factor to achieve standard hatchability, water loss and chick yield. The current study was conducted to evaluate the exact duration of egg incubation and its effects on egg hatchability and broiler's performance at farm. Eggs from Ross-308 breeder flocks having age of 42-46 weeks and standard weight of 55-60g were divided into two experimental groups each consist of (n= 538,560) eggs. Group A was incubated for 506 hours (444h in setter and 62 h in hatcher) and hatch pulling was performed twice 1 st after 494 h and remaining un-hatch eggs were again shifted to hatchers for next 12 h for 2 nd pulling (conventional method of hatch pulling in Pakistan). For group B, hatch pulling was performed after 506 h (456 h in setter and 50 h in hatcher) and complete hatch pulling was done only once. Eggs weight (54.9 ±0.6, 53.9±0.8)at transfer (from setter to hatcher), water loss at transfer (10.6±0.7, 11.67±0.7) and chick weight at day one (42.7±0.3, 41.6±0.3) were significantly (P<0.05) different between group A and B respectively. Similarly, hatchability percentage (85.16±1.02,85.56±1.02) and dead in shell (DIS) percentage(6.62 ±1.5, 6.61±0.8)were also positively (P<0.05) changed in group A as compared to group B respectively. Mortality (3.47±0.23, 2.28±0.06), weight gain (1955.66±25.02, 2001.33±24.33), feed intake (3260.51±13.47, 3245.02±18.03,) and feed conservation ratio at day 35(1.716±0.03, 1.44±0.02) were also found significantly (P<0.05) different in group A than B respectively. These, results indicated that incubation of eggs for 506 h along with single hatch pull is better in terms of water loss, hatchability, DIS percentage and post-hatch performance of broilers.
Analysis of changes in egg quality of broiler breeders during the first reproduction period
Annals of Animal Science, 2012
In reproductive flocks of poultry it is very important to obtain a large number of eggs with normal structure, optimal morphological composition and interior quality. These elements have very significant influence on the biological value of the egg, which determines normal development of the embryo. The aim of the study was to analyse the physical characteristics, morphological composition and quality of individual components of the eggs of Cobb 500 broiler breeders during the first year of reproduction. The research material was hatching eggs (280 pcs), whose quality was assessed 7 times in the reproductive season at 5-week intervals. The eggs were examined when the hens were aged 26, 31, 36, 41, 46, 51 and 56 weeks (40 eggs for each age). The following characteristics were evaluated: egg weight (g); egg shape index (%); egg specific gravity (g/cm3); shell thickness (mm); average number of pores in the eggshell (pcs/0.25 cm2); yolk, white and shell weight (g) and their percentage i...
Advancements in Life Sciences, 2023
The most significant component in influencing the performance of the laying flock is egg size. Though commercial broiler farming is in operation, little is known about how breeder hatching egg weight during middle (45 th week) phase of yield production effects on qualities of egg & chick and post-hatch Hubbard broiler growth performance. Methods: At 45 weeks of age, hatching eggs (n=930) from a commercial broiler breeder flock were gathered as well as classified into 3 groups of egg weight: short (60.25±0.25g), medium (65.10 ± 0.31g), and large (70.07 ± 0.61g). These eggs more classified into 2 groups i.e., egg quality parameters and incubation & post hatch performance metrics. Eggs for performance measures related to incubation and post hatch as well as eggs for quality factors are two further categories into which these eggs are divided. Result: The proportion of shell weight was higher in the eggs obtained from small egg group. The size of the eggs had an effect on the shape index and specific gravity, with larger eggs having lower values. Both male and female chicks' weight and length were significantly influenced by egg size. Data of the body weight gain indicated that as broilers age increases, impact of egg weight on post-hatch performance of chicks' decreases. Up until age 21, female chicks' body weight gain was highly influenced by egg size. The female chicks' feed conversion ratio at day 21 of life was considerably impacted by various egg-weight categories, while it had no effect on male and female chicks at day 35. Conclusion: Egg size favorably influenced the features of the chicks (weight and length) but without any impact on feed consumption, conversion ratio & mortality or ultimate overall live weight of the broilers.