Improved Hatchability of Turkey Eggs at High Altitudes Due to Added Oxygen and Increased Incubation Temperature

Christensen, V. L.; Bagley, L. G.

doi:10.3382/ps.0670956

Cited by 10 publications

(2 citation statements)

References 12 publications

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“…There are two oxygen sensitive periods during the chick embryo development, the embryo day 0–4 (early stage) and the respiratory gas exchange (around the E19, the late stage) [43]. Increased oxygen tension in the early and late stages of development results in increased hatchability, while during while the middle stage of development increased oxygen causes little or no change [44]–[46].…”

Section: Discussionmentioning

confidence: 99%

Hypoxia-Induced miR-15a Promotes Mesenchymal Ablation and Adaptation to Hypoxia during Lung Development in Chicken

Hao

et al. 2014

PLoS ONE

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The lungs undergo changes that are adaptive for high elevation in certain animal species. In chickens, animals bred at high elevations (e.g., Tibet chickens) are better able to hatch and survive under high-altitude conditions. In addition, lowland chicken breeds undergo physiological effects and suffer greater mortality when they are exposed to hypoxic conditions during embryonic development. Although these physiological effects have been noted, the mechanisms that are responsible for hypoxia-induced changes in lung development and function are not known. Here we have examined the role of a particular microRNA (miRNA) in the regulation of lung development under hypoxic conditions. When chicks were incubated in low oxygen (hypoxia), miR-15a was significantly increased in embryonic lung tissue. The expression level of miR-15a in hypoxic Tibet chicken embryos increased and remained relatively high at embryonic day (E)16–20, whereas in normal chickens, expression increased and peaked at E19–20, at which time the cross-current gas exchange system (CCGS) is developing. Bcl-2 was a translationally repressed target of miR-15a in these chickens. miR-16, a cluster and family member of miR-15a, was detected but did not participate in the posttranscriptional regulation of bcl-2. Around E19, the hypoxia-induced decrease in Bcl-2 protein resulted in apoptosis in the mesenchyme around the migrating tubes, which led to an expansion and migration of the tubes that would become the air capillary network and the CCGS. Thus, interfering with miR-15a expression in lung tissue may be a novel therapeutic strategy for hypoxia insults and altitude adaptation.

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Section: Discussionmentioning

confidence: 99%

Hypoxia-Induced miR-15a Promotes Mesenchymal Ablation and Adaptation to Hypoxia during Lung Development in Chicken

Hao

et al. 2014

PLoS ONE

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“…One of differentiated temperature stimuli can be a short-term heating of eggs at the beginning of incubation, as it was established for turkeys in order to facilitate their embryogenesis [37]. There is an issue of low hatchability due to the imperfect artificial incubation of goose eggs, although almost 100% of goslings can be hatched when natural incubation occurs.…”

Section: Figurementioning

confidence: 99%

Vitamin E and A Availability in Goose Embryos and Goslings and Improvement of Reproduction Traits Depending on the Starting Temperature Regime of Egg Incubation

Іонов

Катеринич

Кuchmistov

et al. 2023

Poultry

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One of the major problems impeding the sustainable development of goose production is low egg hatchability. Thus, it is imperative to develop more efficient ways to improve the hatching qualities of goose eggs. The present study aimed to investigate the effects of changes in the temperature regime of incubation on the availability of vitamins A (retinol) and E (α-tocopherol), as well as important elements of antioxidant protection in embryos and goslings. The initial heating of eggs at temperatures of 39 and 39.5 °C during the first 24 or 36 h was used as the main factor influencing goose embryo development. The dynamics in the content of antioxidant retinol and α-tocopherol were analyzed in the liver of embryos and goslings (up to 9 days of age) using the standard regime of incubation (at 38 °C) and the prior heating of eggs (at 39 °C and 39.5 °C) in the first 24 and 36 h of incubation. The obtained results provided new information about the effect of the initial heating of eggs on the function of antioxidants in the gosling’s body. It was confirmed that the age-related changes of retinol and α-tocopherol levels in goslings are similar to those found in chicks, ducklings, and turkey-poults. In addition, the effect of an egg’s weight on hatchability was established, with the hatchability of eggs in the medium weight class being higher than that of smaller and larger eggs. The efficiency of the redistribution of retinol from the yolk to the liver in day-old goslings was higher by 6% when exposing eggs to a temperature of 39.5 °C for 36 h. The initial heating regime at 39.5 °C led to an increased hatch of goslings, and to the evenness of their hatch from eggs of different weights, approaching the hatch values of the medium class. Overall, the α-tocopherol concentration in the liver of embryos and goslings, using the starting heating of eggs, was higher than that with the standard temperature mode of incubation. At the same time, the hatch rate of goslings increased by 9–13%, and the hatchability of eggs by 10–16%. For use in the practice of hatcheries and breeding poultry farms, it is recommended that goose eggs are heated for 36 h at 39.5 °C.

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Comparisons of turkey embryos incubated in tenuous or dense gas environments—II. Organ growth

Bagley

Christensen

1989

Comparative Biochemistry and Physiology Part A: Physiology

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Improved Hatchability of Turkey Eggs at High Altitudes Due to Added Oxygen and Increased Incubation Temperature

Cited by 10 publications

References 12 publications

Hypoxia-Induced miR-15a Promotes Mesenchymal Ablation and Adaptation to Hypoxia during Lung Development in Chicken

Hypoxia-Induced miR-15a Promotes Mesenchymal Ablation and Adaptation to Hypoxia during Lung Development in Chicken

Vitamin E and A Availability in Goose Embryos and Goslings and Improvement of Reproduction Traits Depending on the Starting Temperature Regime of Egg Incubation

Comparisons of turkey embryos incubated in tenuous or dense gas environments—II. Organ growth

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