Effect of Incubator Type and Broiler Breeder Age on Hatchability and Chick Quality

Araújo, Itallo Conrado Sousa de; Leandro, Nadja Susana Mogyca; Mesquita, Mariana Alves; Café, Marcos Barcellos; Mello, H.H.C.; Gonzáles, Elisabeth

doi:10.1590/1806-9061-2015-0146

Cited by 38 publications

(50 citation statements)

References 27 publications

(24 reference statements)

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“…The results regarding the hatching:fertile egg ratio corroborate those of Santos et al (2015), who studied quail breeders of different ages and also found that older quails (48 weeks) had worse results for egg hatching than those of younger breeders (20 weeks old) and corroborate those of Araújo et al (2016), who studied broiler breeders of different ages and also found that older quails (59 weeks) had worse results for egg hatching than those of younger breeders (29 or 35 weeks). According to Almeida et al (2006), the lower rate of egg hatching among older breeders can be explained by the poorer quality of the shell, which results in a high rate of embryo mortality.…”

Section: T (°C)supporting

confidence: 84%

Effect of breeder age and storage conditions of Japanese quail eggs on hatchability, quail neonate quality, and Bursa of Fabricius characteristics

et al. 2017

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-Two experiments were conducted to evaluate combinations of different storage periods and temperature of hatching eggs of breeder quails in two stages of the production cycle (24 and 43 weeks) on hatchability, quail neonate quality, and Bursa of Fabricius characteristics. In each experiment, a total of 1.050 Japanese quail eggs were incubated in a randomized block design in a factorial arrangement of 2 × 5 × 2, with two breeder ages (24 and 43 weeks), five storage periods (one, three, six, nine, and twelve days), and two storage temperatures (28 and 14 °C), totaling 20 treatments with 52 eggs each. Quantitative data were subjected to ANOVA and means were compared by Tukey's test. Qualitative data were subjected to Friedman's test. Polynomial regression analysis was performed in relation to the storage period of the eggs. Hatchability of 43-week-old breeders worsened as the storage period increased at 28 °C, while at 14 °C, hatchability was not affected. Yolk-free body weight was influenced only by storage period; therefore, the group stored for 12 days had the lowest yolk-free body weight. Twelve days of storage reduced the absorption of yolk residue and physical quality score and also affected neonate quail immunity. Fertile eggs from Japanese quails that are destined for incubation should be stored at 14 °C to maintain physical and immunological quality of the progeny. Moreover, eggs from older breeders originate lower-quality quails when eggs are not stored in a refrigerated environment.Key Words: Coturnix coturnix japonica, fertile egg, flock age, immunity, quail production

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Section: T (°C)supporting

confidence: 84%

Effect of breeder age and storage conditions of Japanese quail eggs on hatchability, quail neonate quality, and Bursa of Fabricius characteristics

et al. 2017

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“…Guinea fowl embryos are smaller than chicken, turkey, and Pekin duck embryos from the first day of incubation until the newly hatched chick, and are even smaller than birds with the same incubation period. According to Araújo et al (2016), egg weight is a determinant of newborn chick size, which explains the smaller size of Guinea fowl embryos relative to the other fowl species discussed here. Dupuy et al (2002) argued that, although chicken and mallard embryos have similar morphological characteristics, the absolute development rate differs between these birds.…”

Section: Discussionmentioning

confidence: 90%

Macroscopic embryonic development of Guinea fowl compared to other domestic bird species

Araújo

Lucas²,

Machado

et al. 2019

R. Bras. Zootec.

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Reproduction Full-length research article Macroscopic embryonic development of Guinea fowl compared to other domestic bird species ABSTRACT-Since few studies have addressed the embryonic development of Guinea fowl (Numida meleagris), the objective of the present study was to evaluate its embryonic development in the Cerrado region of Brazil and compare the results to published descriptions of the embryonic development of other domestic bird species. The commercialized weight for Guinea fowl eggs used in the experiment was found to be 37.57 g, while egg fertility was 92%. Embryo growth rate (%) was higher on the sixth day of incubation relative to other days. The heart began beating on the third day of development, while eye pigmentation and upper and lower limb buds appeared on the sixth day. The yolk sac was incorporated on the 24th day followed by chick external pipping and hatching on the 28th day. Comparisons revealed that the embryonic development of Guinea fowl exhibits both similarities to, and differences from, the embryonic development of other domestic birds. From three days of embryonic development, differences were observed among the compared species. Despite the same incubation period, Guinea fowl embryos develop faster than turkeys. All species begin internal pecking two days before hatching and internal pecking 24 h before hatching.

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“…This result may be related to the age of breeder, which was seen to be directly related to the number of eggshell pores. Older breeders laid eggs with thinner and more porous shells and produced chicks of greater weight (Araújo et al, 2016). The strong positive correlations that chick weight and yolk free body weight showed in relation to mean eggshell porosity can be explained by the metabolism of the embryo, since it receives oxygen by means of diffusion through the shell pores.…”

Section: Discussionmentioning

confidence: 97%

“…According to Araújo et al (2016), eggshell conductance is related to loss of metabolic water and gases from inside the egg to the external environment. During the incubation period, it is important to maintain the rate of water loss at an appropriate level for satisfactory hatching, i.e., between 10 and 14%.…”

Section: Discussionmentioning

confidence: 99%

“…During the incubation period, it is important to maintain the rate of water loss at an appropriate level for satisfactory hatching, i.e., between 10 and 14% (Araújo et al, 2016). According to Gonzales and Mello (2012), problems of inappropriate egg weight loss due to low or high conductance can be corrected within certain limits, through increasing or decreasing the humidity within the incubation environment.…”

Section: Introductionmentioning

confidence: 99%

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Water vapor conductance: a technique using eggshell fragments and relations with other parameters of eggshell

et al. 2017

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-The objective of this study was to evaluate a technique for quantifying eggshell conductance using shell fragments from hatched eggs. Additional objectives were to calculate the correlation between eggshell conductance, porosity, and thickness and correlate these parameters with incubation data. The study design was fully randomized in a 3 × 3 factorial scheme (three egg regions -large end, equator, and narrow end -and three ages of broiler breeders -29, 35, and 59 weeks). A total of 216 eggs were used, with 24 repetitions for each treatment. Neither conductance nor shell thickness showed any interaction with egg region. Breeder age influenced eggshell conductance, such that it was greatest in eggshells from 59-week breeders (0.323 mg day −1 torr −1 ), while for 29-week and 35-week breeders, the conductance values found were 0.285 and 0.270 mg day −1 torr −1 , respectively. The eggshell thickness was similar in eggs from 29 and 35-week breeders and these were greater than the thickness of eggshells from 59-week breeders. Correlations between mean eggshell conductance and chick body weight and yolk free chick body weight were found significant. There were no correlations between mean eggshell thickness and any of the data evaluated. There were positive correlations between mean eggshell porosity and egg weight loss up to the time of transfer, chick weight, and yolk free body weight. The technique of using eggshell fragments can be used for measuring eggshell conductance. Eggshell porosity is the characteristic that best correlates with incubation parameters.Key Words: fertile eggs, porosity, shell conductance, shell thickness Revista Brasileira de Zootecnia

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Effect of Incubator Type and Broiler Breeder Age on Hatchability and Chick Quality

Cited by 38 publications

References 27 publications

Effect of breeder age and storage conditions of Japanese quail eggs on hatchability, quail neonate quality, and Bursa of Fabricius characteristics

Effect of breeder age and storage conditions of Japanese quail eggs on hatchability, quail neonate quality, and Bursa of Fabricius characteristics

Macroscopic embryonic development of Guinea fowl compared to other domestic bird species

Water vapor conductance: a technique using eggshell fragments and relations with other parameters of eggshell

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