Effects of Dietary Corticosterone on Yolk Colors and Eggshell Quality in Laying Hens

Kim, Yeon-Hwa; Kim, Jimin; Yoon, Hae-Sung; Choi, Yang-Ho

doi:10.5713/ajas.14.0849

Cited by 31 publications

(18 citation statements)

References 51 publications

(70 reference statements)

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“…Composition of laying hen diets affects pigmentation of egg yolks (Cho et al, 2012). Some feed additives such as dietary corticosterone (Kim et al, 2015), dried carrot meal (Sikder et al, 1998), and canthaxanthin (Cho et al, 2012) have been used to change the color of egg yolk. Likewise, turmeric and sumac are used in foods as a coloring and flavoring agent (Wang et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Effects of sumac and turmeric as feed additives on performance, egg quality traits, and blood parameters of laying hens

et al. 2018

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The objective of this study was to investigate the effects of sumac and turmeric on performance, egg quality traits, and blood parameters of laying hens. Forty Lohman Brown hens at 30 weeks of age were distributed into four groups, consisting of five replicates with two hens in each. The experiment lasted for 42 days. Laying hens were fed different basal diets in treatment groups and control groups. The groups consisted of hens fed a basal diet with 0.5% sumac, a basal diet with 0.5% turmeric, and a basal diet with 0.25% sumac + 0.25% turmeric. Hens were given ad libitum access to feed and water during the experiment. The results revealed that there were no statistically significant differences in terms of final body weight, egg production, egg weight, and feed intake after the groups were fed according to the diets as 0.5% sumac, 0.5% turmeric, and 0.25% sumac + 0.25% turmeric. Addition of turmeric increased egg production and egg weight, but reduced the feed conversion ratio compared with the control group. On the other hand, dietary supplementation with sumac decreased egg weight. Shape index, yolk index, albumen index, Haugh unit, and yolk color parameters were also not affected by dietary supplementation of turmeric and sumac. When layers were fed the 0.25% sumac + 0.25% turmeric-supplemented diet, yolk index was higher in number, but Haugh unit and albumen index were lower. Dietary addition of sumac and turmeric does not have any negative influence on performance and egg quality traits of laying hens. Dietary treatments do not significantly affect blood serum cholesterol, alanine aminotransferase (ALT), and aspartate aminotransferase (AST) levels. With the supplementation of turmeric, AST and ALT levels are higher in number among all the groups. Dietary sumac and turmeric can be added at 0.5% level to laying hen rations without changing animal performance.

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Section: Introductionmentioning

confidence: 99%

Effects of sumac and turmeric as feed additives on performance, egg quality traits, and blood parameters of laying hens

et al. 2018

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“…The concentration of calbindin in the eggshell gland is proportional to the rate of shell Ca 2+ deposition [ 11 , 15 ]. Whereas a considerable number of studies have addressed the ways in which eggshell characteristics are influenced by factors such as genetics, the time the eggs spend in the uterus, female characteristics, and the diet of the female [ 16 – 19 ], the role of calbindin in determining eggshell quality during infection has received limited attention.…”

Section: Introductionmentioning

confidence: 99%

Deterioration of eggshell quality in laying hens experimentally infected with H9N2 avian influenza virus

Dai

et al. 2016

Vet Res

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This study aimed to determine the mechanism by which H9N2 avian influenza virus (AIV) affects eggshell quality. Thirty-week-old specific pathogen free egg-laying hens were inoculated with the chicken-origin H9N2 AIV strain (A/Chicken/shaanxi/01/2011) or with inoculating media without virus by combined intraocular and intranasal routes. The time course for the appearance of viral antigen and tissue lesions in the oviduct was coincident with the adverse changes in egg production in the infected hens. The viral loads of AIV have a close correlation with the changes in the uterus CaBP-D28k mRNA expression as well as the Ca concentrations in the eggshells in the infected hens from 1 to 7 days post inoculation (dpi). Ultrastructural examination of eggshells showed significantly decreased shell thickness in the infected hens from 1 to 5 dpi (P < 0.05). Furthermore, obvious changes in the structure of the external shell surface and shell membrane were detected in the infected hens from 1 to 5 dpi as compared with the control hens. In conclusion, this study confirmed that H9N2 AIV strain (A/Chicken/shaanxi/01/2011) infection is associated with severe lesions of the uterus and abnormal expression of CaBP-D28k mRNA in the uteri of the infected hens. The change of CaBP-D28k mRNA expression may contribute to the deterioration of the eggshell quality of the laying hens infected with AIV. It is noteworthy that the pathogenicity of H9N2 AIV strains may vary depending on the virus strain and host preference.

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“…However, there were no significant changes in albumin, AST, glucose, alkaline phosphatase, γ-glutamyltransferase, and heterophil/lymphocyte ratios. Increased plasma concentrations in albumin, amylase, and AST may be associated with stress conditions such as dietary corticosterone (25). Together, these results suggest that blood data from stress studies should be cautiously interpreted.…”

Section: Discussionmentioning

confidence: 86%

An Acute, Rather Than Progressive, Increase in Temperature-Humidity Index Has Severe Effects on Mortality in Laying Hens

et al. 2020

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This study was conducted to evaluate the effects of temperature-humidity index (THI) on the mortality and the panting rates in hens exposed to varying thermal environments. Hens were challenged with an acute elevation in THI in Experiment 1, where dry-bulb temperature and relative humidity were set at ∼27 • C and 56% at the beginning of the experiment and changed to 36 • C and 45% at its conclusion, respectively. In Experiment 2, different groups of hens were exposed to a progressive increase in THI, with similar ranges to those used in the previous experiment. In Experiment 3, the hens used in Experiment 2 were again challenged by THI conditions, the intensity of which ranged between those used in the previous two experiments. In Experiment 4, panting rates were recorded under varying THI. In the last, plasma biochemical profiles were determined in blood taken from hens subjected to experimental conditions similar to those in Experiment 2. When THI was acutely elevated from 24.2 • to 32.1 • C within 1 h and then maintained over 4.5 h, no mortality was detected in the first hour, but exceeded 95% after 5 h, and reached 100% at 5.5 h. A gradual increase in THI to 31.2 • C over 6 h did not result in mortality during the first 3 h. When THI was set below the conditions in Experiment 1 but above those in Experiment 2, mortality was 29% at 4 h, 75% at 5 h, and 79% at 8 h. However, no mortality was detected in their respective control groups. Panting was not observed under 25.3 • C and was largely variable under 30 • C. However, all hens exhibited panting exceeding 250 counts/min and 60% mortality at 34 • C when heat stress continued for a duration of up to 280 min. In Experiment 5, high ambient THI resulted in significant reductions in plasma albumin, amylase and aspartate aminotransferase, compared with those in control group (P < 0.05). These results suggest that an acute elevation of THI has more severe effects on mortality in hens than gradual changes even when temperature and humidity are similar in both cases.

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Effects of Dietary Corticosterone on Yolk Colors and Eggshell Quality in Laying Hens

Cited by 31 publications

References 51 publications

Effects of sumac and turmeric as feed additives on performance, egg quality traits, and blood parameters of laying hens

Effects of sumac and turmeric as feed additives on performance, egg quality traits, and blood parameters of laying hens

Deterioration of eggshell quality in laying hens experimentally infected with H9N2 avian influenza virus

An Acute, Rather Than Progressive, Increase in Temperature-Humidity Index Has Severe Effects on Mortality in Laying Hens

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