Symposium: avian embryo nutrition and incubation

Nasir, Z.; Peebles, E. D.

doi:10.3382/ps/pey137

Cited by 9 publications

(8 citation statements)

References 6 publications

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“…Due to avian embryos' rapid growth and high metabolism, they have a great demand for energy and nutrients during late embryonic development, resulting in an imbalance between the consumption and retention of nutrients within the eggs (1). In recent years, in ovo feeding during incubation is regarded as a way to correct this imbalance by providing additional nutrients to meet the developmental needs of embryos and post-hatch chickens during fasting (2,3).…”

Section: Introductionmentioning

confidence: 99%

Effects of in ovo Injection of Astragalus Polysaccharide on the Intestinal Development and Mucosal Immunity in Broiler Chickens

Yang

Qin

et al. 2021

Front. Vet. Sci.

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The purpose of this study was to examine the effects of in ovo injection of Astragalus polysaccharide (APS) on hatchability, body weight (BW), intestinal histomorphology, the number of IgA+ cells and sIgA content in intestine, and the expression of intestinal immune-related genes in broiler chickens. On day 18 of the incubation, a total of 960 live embryo eggs were weighed and randomly divided into 4 treatment groups: a control group and three APS groups. The eggs in the control group were injected with 0.5 mL physiological saline. The eggs in the APS groups were injected with 3 different amounts of APS in 0.5 mL physiological saline: 1 mg (APSL), 2 mg (APSM) and 4 mg (APSH). The solution was injected into the amnion of each egg. The results showed that in ovo injection of APS did not affect the hatchability but increased the body weight of the 14 d and 21 d chickens, with a significant increase observed in the APSM group (P < 0.05). At most time points, the villus height (VH) was increased (P < 0.05) and the crypt depth (CD) was decreased (P < 0.05) in the small intestine of the broilers, with higher VH/CD ratios in the APSL and APSM groups compared with the control group. The number of IgA+ cells in the mucosa and the secretory immunoglobulin A (sIgA) levels in the intestinal washings were higher in the APSM and APSH groups than in the APSL and control groups. The gene expression levels of interleukin (IL)-2, interleukin (IL)-4, interferon gamma (IFN-γ), and Toll-like receptor (TLR)-4 were significantly enhanced by APS stimulation at most time points (P < 0.05). These results indicated that in ovo injection of APS has the potential of promoting intestinal development and enhancing intestinal mucosal immunity of broiler chickens in the early stage after hatching.

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Section: Introductionmentioning

confidence: 99%

Effects of in ovo Injection of Astragalus Polysaccharide on the Intestinal Development and Mucosal Immunity in Broiler Chickens

Yang

Qin

et al. 2021

Front. Vet. Sci.

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“…Understanding the stage of embryo development and the incubation time most conducive to egg injection are the key issues that must be studied to maximize hatchability and chick quality after hatching. Nasir & Peebles (2018) report that the location and date of inoculation in egg affect hatching; therefore, to segment preferred sites within the embryonated egg, one needs to understand the different physiological characteristics associated with the embryonic development phase.…”

Section: Introductionmentioning

confidence: 99%

Egg inoculation of conjugated linoleic acid and lauric acid in meat quails

Paula

Valentim

Pinheiro

et al. 2021

Agraria

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The objective of this study was to evaluate the effects of inoculation in egg with sources of conjugated linoleic acid (CLA) and lauric acid (LA) on hatchability, zootechnical performance and carcass characteristics of quails from one to 35 days of age. On the 7 th day of incubation, the eggs were inoculated with 0.05 mL of the supplement according to the treatments, CLA and LA. After birth, the birds were housed in cages until 35 days. A completely randomized design was used, with six treatments and six replicates of 10 birds per cage. The inoculations in eggs with CLA and LA did not interfere in the performance and carcass characteristics of quails at 21 and 35 days of age. However, may be associated with a decrease in egg hatchability. The highest absolute weight of the gizzard was observed at 35 days, from birds inoculated in egg with CLA 240 mg and LA 60 mg in the incubation phase, in comparison to the other treatments. In conclusion, the reduction in hatchability makes it impossible to recommend the use of conjugated linoleic acid and lauric acid -in ovo.

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“…The mineral matters used in embryonic nutrition are obtained from albumen, shell and yolk. The most important vitamin and mineral source of the embryo is egg yolk (Bauer et al, 2013;Nasir and Peeble, 2018). These nutrients in the egg transmit to the embryo by the vitelline membrane and the veins during incubation.…”

Section: Introductionmentioning

confidence: 99%

“…This veining system necessary for embryonic development is separated into parts. The first of these systems is the vitelline veins meeting the nutrient need in the development of the embryo and the other is the allantoic veins providing the removal of the residues of these nutrients and the breathing (Bauer et al, 2013;Nasir and Peeble, 2018). Recent studies are revealing that the embryo consumes orally the nutrients in the egg (Moran, 2007).…”

Section: Introductionmentioning

confidence: 99%

Examining the Nutrient Exchange in All Incubation Periods in Chukar Partridges

Kizilaslan

Şimşek

2021

ASD

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Background: This study was conducted to examine the development of the embryo during incubation and the composition, amount and consumption of the egg nutrients among Chukars (Alectoris chukar). Methods: A total of 1210 eggs were carefully separated into their components (albumen, yolk, shell, amniotic-allantoic fluid and embryo) on day 0 (fresh), in the first (day 7), second (day 14) and third (day 21) weeks of incubation and on the hatching date. The moisture, crude protein, crude fat, carbohydrate, crude ash and energy level were determined in egg components. Result: The albumen, yolk, shell, fluid and embryo rates were calculated to be 53.62, 34.84, 11.53, 0.0 and 0.0% in fresh egg, 16.74, 33.49, 16.22, 31.76 and 2.06% in the first week of incubation, 15.65, 28.32, 15.58, 23.35 and 17.10% in the second week of incubation and 0.0, 23.33, 19.38, 0.0 and 57.29% in the third week of incubation, respectively. The hatching weight of the chick was 16.16 g. The nutrients of the yolk, albumen, fluid and shell proportionally varied significantly in different periods of incubation. According to the nutrient changes calculated based on the weight differences of egg components, carbohydrates were mostly used for nutrients during incubation. It was found that even though the nutrients in all the egg components were used in the different periods of incubation, egg yolk was an important source for the embryo throughout the incubation period.

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Symposium: avian embryo nutrition and incubation

Cited by 9 publications

References 6 publications

Effects of in ovo Injection of Astragalus Polysaccharide on the Intestinal Development and Mucosal Immunity in Broiler Chickens

Effects of in ovo Injection of Astragalus Polysaccharide on the Intestinal Development and Mucosal Immunity in Broiler Chickens

Egg inoculation of conjugated linoleic acid and lauric acid in meat quails

Examining the Nutrient Exchange in All Incubation Periods in Chukar Partridges

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