Technological quality of eggs in relation to the age of laying hens and Japanese quails

Zita, Lukáš; Ledvinka, Z.; Tůmová, E.; Klesalová, Ludmila

doi:10.1590/s1516-35982012000900016

Cited by 21 publications

(24 citation statements)

References 9 publications

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“…The highest average SI was observed in group GG (78.31±0.53%), vs the lowest in WG quails (77.55±0.62%). Our data about shape index agreed with those of other researchers having assessed quail egg quality (8,(11)(12)(13)(14)(15). From the surface inward, the egg consists of a shell with membranes, albumen and yolk.…”

Section: Methodssupporting

confidence: 90%

Egg Quality Traits in Wg, Gg and Gl Japanese Quail Populations

Lukanov¹,

Genchev²,

Kolev³

2019

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The aim of the study was to evaluate egg quality traits in three heavy Japanese quail populations created and reared in the Poultry Breeding Unit of the Trakia University – Bulgaria, marked as WG, GG and GL. In the experiments, 160 female birds from populations WG and GG, and 96 birds from population GL were tested up to the 6th production month. The main egg quality traits were controlled. The highest average egg weight was registered in WG group and the lowest in GL group, 14.04±0.32 g and 12.79±0.29 g respectively (p<0.05). The highest average Shape index was observed in group GG (78.31±0.53%), vs the lowest in WG quails (77.55±0.62%). Albumen proportion is almost 2/3 of egg mass, with average values from 57.14% in group WG tо 59.90% in group GG. Yolk proportion was about 30%, with smaller differences between the groups. The shell share from all tested groups comprised between 10.95 and 12.58% of egg weight. Average shell thickness was the greatest in eggs of WG quails (223.53±5.52 μm), and the lowest – in GG quails (216.91±6.83 μm). Egg quality traits were typical for the meat productive type of Japan quails.

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Section: Methodssupporting

confidence: 90%

Egg Quality Traits in Wg, Gg and Gl Japanese Quail Populations

Lukanov¹,

Genchev²,

Kolev³

2019

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“…The tendency was also mentioned by other researchers on quail egg quality (13)(14)(15)(16). Like us, Yilmaz-Dikmen and Ipek (17), Vali et al (18) and Zita et al (19) found out lower egg weight by the end of the production cycle. The highest mean egg weight for the period was registered in WG eggs (14.04±0.32 g), followed by GG (13.65±0.27 g) and GL (12.79±0.29 g) eggs.…”

Section: Resultsmentioning

confidence: 55%

Comparative Investigation of Egg Production in Wg, Gg and Gl Japanese Quail Populations

Lukanov¹,

Genchev²,

Kolev³

2018

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The aim of the study was to evaluate egg production in three heavy Japanese quail populations created and reared in the Poultry Breeding Unit of the Trakia University – Bulgaria, marked as WG, GG and GL. In the experiments, 160 female birds from populations WG and GG, and 96 female birds from population GL were tested up to the 6th production month. The main egg production traits were controlled. The highest egg production for the period was demonstrated in group GL (79.84±4.46%), followed by group GG (76.33±3.40%) and group WG (72.11±4.16%). Quails from the WG group were outlined with least efficient feed conversion per egg (74.49±1.21 g feed), while those from the GL group: with the most efficient one – 64.93±1.41 g (p<0.01). The highest average egg weight in descending order was observed in the WG group (14.04±0.32 g), GG group (13.65±0.27 g) and GL group (12.79±0.29 g). The Japanese quail populations created and maintained at the Trakia University showed a potentially good egg production for the production type they belonged to, which makes them attractive for use in interline hybridisation schedules, including for production of autosexing stock layers.

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“…Shell quality including thickness and strength were known to decrease with age of hens, probably due to poorer functioning on calcium metabolism (Zita et al, 2012). Bone (Moreki et al, 2011) and serum calcium (Garlich et al, 1984) status that represent calcium metabolism were also diminished with increasing age.…”

Section: Discussionmentioning

confidence: 99%

Effect of Dietary β-Mannanase Supplementation and Palm Kernel Meal Inclusion on Laying Performance and Egg Quality in 73 Weeks Old Hens

Lee¹,

Kim²,

Lee³

et al. 2013

Journal of Animal Science and Technology

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This study was conducted to evaluate the effect of dietary β-mannanase supplementation and palm kernel meal (PKM) inclusion (5%) on laying performance, egg quality and nutrient utilizability of laying hens with 73 weeks of age. A total of 240 Lohmann brown laying hens with average 77.5% egg production were randomly allocated with 60 hens per treatment, 4 replicates per treatment and 15 hens per replicate. Experimental design was a completely randomized design with 2 × 2 factorial arrangement, with the factors being (1) two levels of PKM (0 vs. 5%) and (2) with or without dietary β-mannanase (480 IU/kg of diet CTCzyme ® ) supplementation. All hens were housed in cages (35 cmW × 35 cmD × 40 cmH) with 2 hens per cage for six weeks feeding trial. Laying performance was recorded daily during feeding trial. Egg quality, nutrients utilizability and blood assays were done at the end of feeding trial. Egg production was improved (P<0.05) by both dietary PKM inclusion and β-mannanase combined supplementation. Either β-mannanase or PKM did not affect feed intakes and feed conversion ratio of all diets. Egg weight of hens fed diet containing 5% of PKM had heavier (P<0.05) eggs compared with hens fed without PKM. Albumen height was improved (P<0.05) by dietary mannanase supplementation. Crude fat utilization of 5% PKM diet was higher than that of no PKM diet regardless of β-mannanase supplementation. Both DM and total carbohydrate utilization were decreased (P<0.05) in hens fed 5% PKM diet. Serum IgG and yolk IgY contents of PKM groups were lower (P<0.05) than those of no PKM groups. This result showed that 5% PKM diet, independent of dietary β-mannanase supplementation, was able to improve egg production. In addition, dietary β-mannanase supplementation could be used for improving the albumen height of eggs.

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Technological quality of eggs in relation to the age of laying hens and Japanese quails

Cited by 21 publications

References 9 publications

Egg Quality Traits in Wg, Gg and Gl Japanese Quail Populations

Egg Quality Traits in Wg, Gg and Gl Japanese Quail Populations

Comparative Investigation of Egg Production in Wg, Gg and Gl Japanese Quail Populations

Effect of Dietary β-Mannanase Supplementation and Palm Kernel Meal Inclusion on Laying Performance and Egg Quality in 73 Weeks Old Hens

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