Eggshell Qualities as Indicative of Eggshell Strength for Layer Selection

Kibala, Lucyna; Rozempolska-Rucińska, Iwona; Kasperek, Kornel; Zięba, G.; Łukaszewicz, M.

doi:10.1590/1806-9061-2017-0590

Cited by 8 publications

(9 citation statements)

References 20 publications

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“…Mean eggshell thickness ranges from 0.17 to 0.30 mm for quail eggs (Ergun and Yamak, 2017); therefore, the results of this study were within the normal values for quail eggs and did not influence eggshell quality, since specific weight and eggshell weight were not affected. Specific weight is an indirect measure of eggshell quality and is strongly positively correlated with eggshell thickness (Kibala et al, 2018). In agreement with the results of the current study, Belloni et al (2015), Zeweil et al (2016), andSoltani et al (2019) reported that propolis had no effect on egg quality (egg weight, specific weight, shell weight, Haugh unit, and yolk and albumen indices).…”

Section: Discussionsupporting

confidence: 91%

Effect of green propolis on the productivity, nutrient utilisation, and intestinal morphology of Japanese laying quail

Pieroni

Oliveira

Santos

et al. 2020

Revista Brasileira De Zootecnia

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In this study, we evaluated the effects of dietary inclusion of ethanolic extract of green propolis (EEGP) on productivity, egg quality, nutrient utilization, and duodenal morphology of 120 Japanese laying quail. The quail were randomly distributed into five treatment groups: one group with no EEGP in the diet (control diet) and four groups with increasing EEGP levels (500, 1000, 1500, and 2000 mg EEGP/kg diet) in the diets. Excreta and diet samples were collected on day 40 and were analyzed for dry matter (DM), crude protein (CP), ether extract (EE), ash, gross energy (GE), calcium, and phosphorus to evaluate the nutrient and energy use. At the end of the study period, productive performance, egg quality, and duodenum morphology were evaluated. Duodenal sections were obtained from four birds per treatment and were processed for optical microscopy. The EEGP did not affect DM, GE utilization, apparent metabolizable energy, ash retention, feed intake, feed conversion, egg mass, egg quality, crypt depth, or villus height:crypt depth ratio in the duodenum. However, EEGP did increase laying rate, CP, EE, calcium, and phosphorus utilization, as well as villus height and absorption surface area in the duodenum when provided to birds at 1500 and 2000 mg/kg in the diet. Thus, the inclusion of EEGP at 1500 ppm in the diet of Japanese laying quail improves productivity, egg quality, nutrient utilization ability, and duodenal morphology.

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Section: Discussionsupporting

confidence: 91%

Effect of green propolis on the productivity, nutrient utilisation, and intestinal morphology of Japanese laying quail

Pieroni

Oliveira

Santos

et al. 2020

Revista Brasileira De Zootecnia

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“…Hamilton (1982) presented that eggshell thickness is an indirect trait to determine its strength. The result of this study is associated with earlier studies that reported significant positive correlations between eggshell breaking strength and eggshell thickness (Yan et al, 2014;Kibala, 2018). Moreover, this result is consistent with Bain (2005), who has indicated that thicker eggshells are not necessarily the same as stronger eggshells because the strength of eggshells is related to mineral components of the eggshell.…”

Section: Correlation Between the Eggshell Breaking Strength And The E...supporting

confidence: 91%

Correlation between Internal and External Egg Quality Indicators in the Early Phase of Hy-Line Brown Laying Hens

Jang¹

2022

Korean J. Poult. Sci.

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“…This could be due to the higher egg size of SB (Omotara et (Kibala et al, 2018). Genotypic differences in ST is related to differences in body physiology (Ombasilar and Tabib, 2019) however, overall shell quality largely depends on environmental factors such as age of ock, diet, stress, disease, and rearing system (Kibala et al, 2018). The values reported for ST in the present study fall within the normal range of 0.35-0.40 mm for chickens (Kibala et al, 2018).…”

Section: Resultssupporting

confidence: 53%

“…This suggests that unimproved local breeds (laying smaller eggs) have higher proportion of yolk compared to commercial strains (laying large sized eggs) as was alluded to by previous studies (Rakonjac et In the present study, chicken genotype signi cantly in uenced all albumen quality parameters except AI with eggs of SB having higher values compared to those of HEN. This could be due to the higher egg size of SB (Omotara et (Kibala et al, 2018). Genotypic differences in ST is related to differences in body physiology (Ombasilar and Tabib, 2019) however, overall shell quality largely depends on environmental factors such as age of ock, diet, stress, disease, and rearing system (Kibala et al, 2018).…”

Section: Resultsmentioning

confidence: 99%

Genotype and ginger (Zingibar officinale) rhizome powder dietary supplementation affect egg quality indices of aged layer chickens

Ogbu

2023

Preprint

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The study evaluated the effect of genotype and dietary ginger supplementation on egg qualities of aged Shaver brown (SB) and Nigerian heavy ecotype native (HEN) hens. Control (basal diet) groups received layer ration while supplemented (ginger diet) groups received 20g ginger/kg basal ration. Hens were fed 125g/bird/day of the experimental rations. Water was given ad libitum. 80 and 40 eggs were collected from SB and HEN basal diet groups, respectively while 80 eggs/genotype were collected from the ginger diet groups for determination of egg qualities. Egg, yolk, albumen and shell weights (EW, YW, AW and SW); egg length (EL), surface area (ESA), volume (EV), specific gravity (ESG) and shape index (ESI); egg, yolk and albumen diameters (ED, YD and AD); yolk and albumen heights (YH and AH); yolk, albumen, and ratios (YR, AR, SR) and indexes (YI, AI and SI); yolk:albumen (Y/A), Haugh unit (HU); and shell thickness (ST), volume (SV), density (SD) and compression fracture force (SCFF) were determined. Within genotypes, eggs were graded by weight and shape index and compared for quality indices. Main and interaction effects were evaluated by Two-way Analysis of Variance (ANOVA). Shape index grades in SB and weight grades in SB and HEN were compared by One-way ANOVA while shape index grades in HEN were compared by the Student’s T-test. Significant differences were accepted at p ≤ 0.05. Eggs from SB had higher EW, EL, ED, ESA, EV, ESI, YW, AW, AH, AD, AR, SW, SV, SCFF, HU, and Ca but lower ESG, YR, Y/A, Zn and P than HEN eggs. Within genotypes, ginger groups had higher EW, EL, ESA, EV, YW, YD, YR, AH, AI, Y/A, and Zn, but lower ESG, YH and YI compared to basal diet groups. Genotype x diet affected AD (SB-ginger group ˃ basal diet groups ˃ HEN-ginger group), Zn (HEN-ginger group ˃ SB-ginger group ˃ basal diet groups), and P (HEN-ginger group ˃ HEN-basal diet group ˃ SB-diet groups). Egg weight grades differed significantly in EW, ESA, ESG, ESI and SCFF in SB and HEN while shape index grades differed significantly in ESI and Y/A in SB but in ESI, YI and HU in HEN. Overall, genotype, diet, genotype x diet, and weight and shape grades influenced some of the egg quality traits.

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Eggshell Qualities as Indicative of Eggshell Strength for Layer Selection

Cited by 8 publications

References 20 publications

Effect of green propolis on the productivity, nutrient utilisation, and intestinal morphology of Japanese laying quail

Effect of green propolis on the productivity, nutrient utilisation, and intestinal morphology of Japanese laying quail

Correlation between Internal and External Egg Quality Indicators in the Early Phase of Hy-Line Brown Laying Hens

Genotype and ginger (Zingibar officinale) rhizome powder dietary supplementation affect egg quality indices of aged layer chickens

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