Determination of selected biochemical parameters in blood serum and egg quality of Czech and Slovak native hens depending on the housing system and hen age

Kraus, Adam; Zita, Lukáš; Krunt, Ondřej; Härtlová, Helena; Eva, Carola

doi:10.1016/j.psj.2020.10.039

Cited by 24 publications

(42 citation statements)

References 35 publications

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“…On the other hand, only serum uric acid was affected by the dietary CP in birds housed in cage system. A significant interaction between the factors corresponds with the findings from Kraus et al [21] who verified that housing system, breed and age of hen affects the blood parameters with significant interaction between the factors. The birds reared in floor system presented more Likewise, the stocking density of birds differed according to the rearing system and may contributed to differences in birdś metabolism observed.…”

Section: Discussionsupporting

confidence: 86%

Blood biochemical parameters and organ development of brown layers fed reduced dietary protein levels in two rearing systems

et al. 2022

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Objective: An experiment was conducted to evaluate the effect of different levels of crude protein (CP) and two rearing systems (cage and floor), on blood parameters and digestive and reproductive organ development of brown laying hens.Methods: A total of 400 Hisex Brown laying hens between 30 and 45 weeks of age were distributed in a completely randomized design and a 2×4 factorial arrangement, with main effects including two rearing systems (cage and floor) and levels of CP (140, 150, 160, and 180 g/kg), in a total of eight treatments and five replicates of 10 birds each with initial body weight of 1,877 g (laying hen in cage) and 1,866 g (laying hens in floor). The parameters evaluated were plasma total protein, albumin, uric acid, total cholesterol, relative weights of oviduct, abdominal fat, liver, gizzard, crest and dewlap, length of small intestine and oviduct. Results:The blood parameters were similar in birds reared in cage and floor system. The birds reared on the floor showed greater small intestine and oviduct weight (%) and lower liver and pancreas weight (%). A significant interaction was observed between factors for the relative gizzard, crest and dewlap weight, serum protein, uric acid and total cholesterol (P<0.05). The diets with 140 g/kg CP resulted in lower serum protein and lower cholesterol in birds reared in floor system, while birds reared in cage system showed no effect of CP on both parameters. Birds reared in cage and fed with 140 and 150 g/kg CP presented lower uric acid.The group of birds reared in floor system fed 180 g/kg had greater uric acid. Conclusion:The dietary protein level can be reduced up to 140 g/kg for Hisex Brown hens (30 to 45 weeks of age) without an important effect on metabolic profile and organ development in both rearing systems.

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Section: Discussionsupporting

confidence: 86%

Blood biochemical parameters and organ development of brown layers fed reduced dietary protein levels in two rearing systems

et al. 2022

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“…93%, respectively versus 5.68 and 6.05% (Yenice et al, 2016). These values are lower than those reported in various studies (Hanusova et al, 2015;Kraus et al, 2021).…”

Section: Discussioncontrasting

confidence: 61%

“…This is similar to a study by Bari et al (2020) when the authors investigated the effect of early rearing enrichments on some egg quality parameters in free-range layers. Furthermore, various studies have reported that there was an increase in egg weight with advancing hen`s age (Yılmaz Dikmen et al, 2017;Vlčková et al, 2019;Kraus et al, 2021). Also, we identified that eggs from freerange layers were heavier than those in the backyard system.…”

Section: Discussionmentioning

confidence: 49%

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Effect of Production System and Age on Egg Quality Parameters: A Case of Niğde Province Çamardı District, Turkey

Yurtseven

Şekeroğlu

Tainika

et al. 2021

Turkish JAF Sci.Tech.

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This study compared egg quality parameters in layers under free-range system with prefabricated pens and backyard while emphasizing hen age. A total of 300 eggs collected from prefabricated pens and backyard farming families in the Çamardı District of Niğde Province were used as study materials. The assessed external and internal egg quality characteristics included egg weight, shape index, shell thickness, shell breaking strength, albumen index, Haugh unit, yolk index, and yolk colour. The effect of production system on albumen index, Haugh unit, and yolk colour score was found statistically significant. There was a significant effect of age on shape index, shell thickness, shell breaking strength, albumen index, Haugh Unit, yolk index, and yolk colour score. The effect of interaction between age and production system was statistically significant for shape index, shell thickness, yolk index, Haugh Unit, and yolk colour score. It was determined that the egg`s meat and blood spots percentages from the free-range and backyard systems were 10.6% and 15.3%, respectively. It was concluded that while eggs produced from free-range system are superior in terms of egg weight, shape index, and Haugh unit those obtained from backyard hens are higher in eggshell thickness, eggshell breaking strength, and egg yolk colour.

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“…For housing of native breeds, alternative housing systems are more suitable in comparison with cage systems (Zita et al, 2018;Kraus et al, 2021). Intensive breeding causes the loss of many valuable genes, so it is essential to keep the breeding of native breeds (Hanusová et al, 2017).…”

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confidence: 99%

Do the differences in egg contamination, penetration, and resistance against microorganisms among the hen genotypes exist?

Kraus

Zita

Krunt

et al. 2022

Annals of Animal Science

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The aim of this study was to evaluate and compare the impact of genotype and storage conditions (temperature and time) on microbiological contamination and eggshell quality. There were four genotypes of laying hens used, Czech golden spotted (CGS), Greenleg Partridge (GP), White Leghorn (WL) and commercial hybrid (CH) hens were included. After collection, the eggs were divided equally into five groups regarding the storage time (0, 14, 28 days) and temperature (5 and 20 °C). The microbiological analysis included counting of colonies forming units (CFU) of Escherichia coli (EC), Enterococcus (ENT) and total number of microorganisms (TNM) on eggshell surface, eggshell membranes and in thin albumen. The analysis of eggshell quality included the determination of eggshell proportion (SP), thickness (ST), strength (SST), index (SI) and surface (SS). Moreover, egg weight (EW) and egg weight loss (EWL) were determined. The significant effect of genotype was found in contamination of eggshell by EC, ENT and TNM, eggshell membranes by TNM and albumen by EC (all P ≤ 0.05). The significantly lowest contamination of eggshell from EC was in eggs from the WL hens (4.42 log CFU/eggshell), while from ENT was in eggs from the CGS hens (1.22 log CFU/eggshell) and from the WL hens (1.40 log CFU/eggshell). The lowest incidence of TNM was also detected in eggs from the WL hens (5.03 log CFU/eggshell). Statistically the lowest contamination of eggshell membranes by TNM was found in eggs from the WL (0.12 log CFU/eggshell membranes) and CH hens (0.15 log CFU/eggshell membranes). Regarding the effect of genotype, the GP (not detected) and WL (not detected) hens was in eggs with statistically the lowest occurrence of EC bacteria in albumen. Regarding the EW and eggshell quality, all the parameters were significantly affected by the genotype (P ≤ 0.0001). Also EWL was significantly (P ≤ 0.05) affected by genotype (after 14, 21 and 28 days of storage). There were found to be significant differences of microbial contamination of egg surface among observed hen genotypes. The penetration of selected microorganisms was also significant in contamination of eggshell membranes by TNM and in contamination of albumen by EC.

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Determination of selected biochemical parameters in blood serum and egg quality of Czech and Slovak native hens depending on the housing system and hen age

Cited by 24 publications

References 35 publications

Blood biochemical parameters and organ development of brown layers fed reduced dietary protein levels in two rearing systems

Blood biochemical parameters and organ development of brown layers fed reduced dietary protein levels in two rearing systems

Effect of Production System and Age on Egg Quality Parameters: A Case of Niğde Province Çamardı District, Turkey

Do the differences in egg contamination, penetration, and resistance against microorganisms among the hen genotypes exist?

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