Impact of different housing systems and age of layers on egg quality characteristics

Dikmen, Bilgehan Yılmaz; İpek, A.; Şahan, Ümran; Sözcü, Arda; Baycan, Süleyman Can

doi:10.3906/vet-1604-71

Cited by 39 publications

(22 citation statements)

References 22 publications

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“…In their study, Mugnai et al (2014) reported that the egg yolk α-tocopherol and carotenoid levels of the eggs of the animals fed green grass in different seasons increased significantly compared with those that had not been fed this grass. Some researchers (Lordelo et al, 2017;Yilmaz Dikmen et al, 2017) found that organic and free-range reared hens had lighter yolk colour than other systems. But pasture quality is an important factor for pigmenting egg yolk and might be affected by season.…”

Section: Discussionmentioning

confidence: 99%

Impacts of red pepper supplemented diets and different storage conditions on eggs obtained from free-range laying hens

Okur¹,

Kayhan²

2019

SA J. An. Sci.

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Egg quality depends on many conditions, including diet and storage temperature. Consumers usually assess it by checking yolk colour. The aim of the study was to indicate the effects of storage periods (7, 14 and 21 days) and temperature (room and refrigerator) on egg quality parameters, especially yolk colour. The experiment was carried out with 150 eggs, which were collected from free-range Lohmann brown laying hens (42 weeks old) fed with or without 0.75% red pepper supplemented diets. The highest weight loss was observed in the eggs stored at room temperature (23 °C, 64% humidity) for 21 days. In addition, it was discovered that the highest air cell height (ACH) was detected in the eggs stored at room temperature for 14 and 21 days. Red pepper supplementation and storage time and temperature were found to have been effective on the Roche yolk colour fan values (RYCF), lightness (L*) and yellowness (b*). Additionally, red pepper supplementation had a significantly positive effect on the redness (a*) value of the yolk. However, no statistical difference in the a* value was determined between the fresh eggs and the stored eggs supplemented with red pepper. The supplementation of 0.75% red pepper as a natural colouring agent to the diets of free-range laying hens had a positive effect on the yolk colour, which is an important attribution for consumer perception. Furthermore, the colours of the yolks of eggs stored in the refrigerator for a week were not significantly different from the fresh ones. Consequently, the present study suggests feeding laying hens diets supplemented with 0.75% red pepper might be useful in improving yolk colour. The results indicate that the eggs stored in the refrigerator might be closer to the characteristics of fresh eggs. In contrast, eggs stored at room temperature showed more deterioration between treatments.

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Section: Discussionmentioning

confidence: 99%

Impacts of red pepper supplemented diets and different storage conditions on eggs obtained from free-range laying hens

Okur¹,

Kayhan²

2019

SA J. An. Sci.

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“…However, the hens in the treatment having four hens per cage had significantly higher (P < 0.05) feed consumption rate, egg specific gravity, eggshell ratio than hens in the treatment with 1 hen per cage. The authors suggest that white leghorn hens (Hy-Line W36) could be kept in cages at densities of 2,000 or 1,000cm 2 to improve egg quality parameters and performance. A study was undertaken to determine what changes in egg quality characteristics occur during extended cold storage for commercially produced conventional cage, enriched colony cage, and cagefree aviary eggs by Jones et al [12].…”

Section: Housingmentioning

confidence: 99%

“…Albumen height for all strains (Lohmann white, Lohmann brown, H&N white and cross breed) decreased as the age increased in both environments. Dikmen et al [2] studied the impact of different housing systems and age of layers on egg quality characteristics in Turkey. The results indicate that the egg weight, yolk weight, and albumen weight were increasing continuously during the laying period (P < 0.001).…”

Section: Age Of Laying Henmentioning

confidence: 99%

“…Hence, to maintain the superiority in the total egg quality, routine genetic and breeding experimentation considering the production factors such as breed, housing and age that primarily influence egg quality parameters should be carried out continuously for a number of chicken traits in both local, exotic and even crossbred birds. For global commercial egg production, it is estimated that over 75% of hen are reared in cages but new trends are emerging in rearing layers in animal-friendly systems [2]. However, production factors are important for egg production cost, number of salable and its quality gain importance.…”

Section: Introductionmentioning

confidence: 99%

“…This will at a certain point lead to breakage in such losses that it is not economical any longer to produce with the stock [22]. Hence, studies have been conducted on the effects of age on external and internal egg quality traits [2], [17], [23][24][25][26][27][28]. Of course, there are many review relating to production factors that affect egg quality traits [29][30][31][32][33], but the focus of this review was to present current understanding of production factors (breed, housing and age) influencing egg quality traits.…”

Section: Introductionmentioning

confidence: 99%

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A critical review of production factors that influ-ence egg quality traits

2017

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The global poultry industry has experienced significant changes in the methods used to harvest and process the fresh egg over the past century. Applications of animal genetics and breeding have significantly increased in line speed for poultry operation. In this study aims at reviewing production factors that influence egg quality traits across the globe. The production factors so far utilized were classified into three main categories and presented based on their influencing capacity. For this purpose, two types of search criteria to find publications relevant to the scope of this review were employed. The first type was an automatic search performed on the following publishers' databases: ScienceDirect, Google's scholar, researcher gates, academia. The second type was a manual search on conferences, recent theses and dissertation that have not been published in journals from numerous Babcock University. Generally, 23 publications were reported for the breed; 17 for housing, and 19 for age of the breed after excluding studies that do not focus explicitly on breed, housing and age of the bird as production factors that influenced egg quality traits out of 183 potential relevant articles identified from

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Comparison of egg production, quality and composition in three production systems for laying hens

et al. 2020

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The increasing public concern for animal welfare has pushed the poultry sector to progressively replace conventional battery cages (CC) for laying hens with alternative systems such as enriched cages (EC) and aviaries (AV). The aim of this study was to compare laying performance, egg location, and egg quality associated with these three housing types. The experiment was conducted in twelve pilot-scale chambers fitted out with one of the three treatments. Each chamber housed 30 Lohmann LSL-Lite laying hens from 23 to 32 weeks of age. The available area was 492, 780, and 1120 cm²/hen for CC, EC, and AV, respectively. The EC and AV chambers were equipped with nest boxes, perches, and a pecking/scratching area (PSA). In the AV chambers, hens had free access to a space arranged in three levels with a wood shaving litter on the ground level as a PSA. Hen-day production was recorded and egg quality assessment included egg cleanliness, weight and proportion of each component (albumen, yolk, and shell) but also pH, Haugh unit, and meat spots for albumen; color intensity and blood spots for yolk; thickness and resistance for shell. The laying rate and egg weight were similar for CC and EC (around 96.5% and 59.5 g; P > 0.05). For AV, these parameters were significantly lower (77.2% and 58.6 g; P < 0.001) but the differences compared to the cage systems progressively reduced across time. Nearby 70% of the eggs were laid in the nests with EC while almost all of the eggs were laid on the litter at ground level with AV. The rate of clean eggs was around 77% for both cage systems compared to 14% for AV. Most of egg quality traits were identical for the three systems (P > 0.05) but there was a lower yolk proportion for eggs laid in AV (25.2% versus 25.7% for cages systems; P < 0.001) and higher shell resistance for eggs laid in CC (40.7 N versus 39.3 N for alternative systems; P < 0.001). Lower laying performance observed with AV could be explained by higher animal activity and competition for facilities, but these factors were not measured in this study. The reduction of the difference in egg productivity over time compared to cage systems suggest the need for a period of training/ adaptation for pullets/hens kept in such an environment. An enriched cage system seems a balanced solution that combines both laying productivity and improved animal welfare. Further research should be performed to improve acceptance and appropriate use of resources by birds in an aviary system.

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Impact of different housing systems and age of layers on egg quality characteristics

Cited by 39 publications

References 22 publications

Impacts of red pepper supplemented diets and different storage conditions on eggs obtained from free-range laying hens

Impacts of red pepper supplemented diets and different storage conditions on eggs obtained from free-range laying hens

A critical review of production factors that influ-ence egg quality traits

Comparison of egg production, quality and composition in three production systems for laying hens

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