Effects of breeder age and early energy restriction on fattening performance, some meat quality traits and plasma leptin concentration of broilers

Varol, Avcilar Özlem; Onbaşılar, Esin Ebru

doi:10.1501/vetfak_0000002711

Cited by 2 publications

(1 citation statement)

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“…The fact that the calcium storage in the eggshell does not change according to the egg size ensures that the heavy eggs obtained from the old flocks are thin‐shelled (Alfonso‐Torres et al, 2009). Avcilar and Onbasilar (2016) reported that the age of the breeder affected the chick weight, the total body weight gain and feed consumption during the rearing period in broilers. Joseph and Moran (2005) noted that the body weight and yolk sac weight of chicks obtained from young (32‐week‐old) broiler breeders were lower than those obtained from middle‐aged (41‐week‐old) breeders.…”

Section: Introductionmentioning

confidence: 99%

Egg mineral levels, hatching results and bone properties in embryos and chicks obtained from broiler breeders at different ages

Varol Avcılar,

Onbaşılar,

Yalçın

et al. 2023

Animal Physiology Nutrition

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It is inevitable to obtain chicks from breeders of different ages in broiler fattening. However, breeder age has an effect on eggs. There is no detailed study on the changes in mineral levels in eggs and bones of these effects. Therefore, the aim of this study examines how mineral levels of shell, albumen, egg yolk, and bone, embryonic development and bone characteristics change according to the breeder age. A total of 370 fresh hatching eggs were obtained from Ross‐308 breeders at 2 different ages (25 to 60‐week‐old). Egg, embryo, yolk sac and chick characteristics were determined. Morphometric parameters of bones of embryos at 19 days of age and chicks at hatch were examined. Mineral levels of albumen, yolk, shell and bones of embryo and chick were determined. Egg weight, embryo weight, embryo length, chick weight and chick length were higher in old breeder than those of younger one. Femur length, width and Seedor index of tibia, weight, width and Seedor index of metatarsus were found to be high in embryos at 19 days of old breeder than young breeder. There were differences in relative femur weight, tibia length and relative metatarsus weight of chicks at hatch. The mineral levels were high in the femur, tibia and metatarsus of embryos and chicks, in parts of the egg of old breeder. K, Ca, Mg, P, Fe and Mn levels in the eggshell were decreased during incubation. Ca and Mg levels were decreased in the yolk during incubation. K, Ca, Mg, P, Fe, Zn and Mn levels were found to be high in chick bones than those of bones of embryos at 19 days of age. The total embryonic death was found to be high in the fertile eggs of younger breeder group. No differences were observed in fertility, hatchability of fertile and set eggs according to the age of breeders. These data may be useful in designing in‐ovo injections, formulating diets of broiler breeders and broilers and in preventing bone diseases in broilers.

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Section: Introductionmentioning

confidence: 99%

Egg mineral levels, hatching results and bone properties in embryos and chicks obtained from broiler breeders at different ages

Varol Avcılar,

Onbaşılar,

Yalçın

et al. 2023

Animal Physiology Nutrition

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Influence of Early Qualitative Feed Restriction and Barrier Perch Access on Some Meat Quality Traits, Growth Performance, and Diet Cost Analysis in Broiler Chickens

Karaarslan

Tatlı

Kaya

et al. 2024

Annals of Animal Science

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In this trial, the effects of early qualitative feed restriction and barrier perch access on some meat quality traits, growth performance, and diet cost analysis of broiler chickens were investigated. A total of 504 1-d old male chicks (Ross 308) were randomly allocated to four treatments (qualitative feed restriction-QFR; absence-/presence+ and barrier perch-BP; absence-/presence+) with three replicate pens in a completely randomised design involving a 2 x 2 factorial arrangement of treatments. Broiler chickens in the treatment of QFR (-) were fed with a corn-soybean meal diet containing protein and energy at the level specified in the commercial hybrid catalogue during d 0-42. The treatment of QFR (+) was fed with a corn-soybean meal diet containing lower energy (10%) and protein (20%) for the first d 21, and then between d 22-42, they were fed with a diet specified in the commercial hybrid catalogue. In the treatment of BP (+), the barrier perch was placed between the feeder and the drinker. Meat quality traits (pH, lightness-L*, redness-a*, yellowness-b*, chroma, hue angle, and cooking loss-CL), growth performance (body weight-BW, body weight gain-BWG, feed intake-FI, and feed conversion ratio-FCR), and diet cost analysis (total diet cost and diet cost per unit weight gain) were recorded. Except for the a* value and hue angle measured at 24-h post-slaughter, the effect of QFR treatments on meat quality traits was insignificant in all measurements. During d 0-42, in the treatments of QFR (+) of BW, BWG, and FI were lower (respectively P<0.001, P<0.001, and P=0.005), and FCR was worse (P=0.014). The QFR treatments did not differ significantly in dietary cost per unit weight gained during d 0-42. As a result, it can be said that early qualitative feed restriction did not significantly affect meat quality traits. The treatment of QFR (+) resulted in reduced growth performance. However, diet cost per unit weight gain showed similar values in both the QFR treatments (QFR+ €0.75, QFR- €0.76, P=0.511).

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Effects of breeder age and early energy restriction on fattening performance, some meat quality traits and plasma leptin concentration of broilers

Cited by 2 publications

References 33 publications

Egg mineral levels, hatching results and bone properties in embryos and chicks obtained from broiler breeders at different ages

Egg mineral levels, hatching results and bone properties in embryos and chicks obtained from broiler breeders at different ages

Influence of Early Qualitative Feed Restriction and Barrier Perch Access on Some Meat Quality Traits, Growth Performance, and Diet Cost Analysis in Broiler Chickens

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