Effect of Sex and Day-Old Weight on Subsequent Body Weight and Body Mass Index in Commercial Broilers

Al-Nedawi, Ahmed M.; Aljanabi, Thamer Kareem; Altaie, S. M. S.; Al-Samarai, Firas Rashad

doi:10.17582/journal.aavs/2019/7.1.45.48

Cited by 3 publications

(4 citation statements)

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“…However, these changes could be considered to be unrelated to the test substance because no significant changes were found in the lymphatic organs (e.g., thymus and bursa of Fabricius) upon histopathological examination. In addition, it has been reported that the range of hematologic parameters in poultry, including Ross 308, is very wide, and their changes could be attributed to physiological, environmental, and dietary conditions (Al‐Nedawi, 2018; Harrison & Lightfoot, 2005; Talebi et al, 2005).…”

Section: Discussionmentioning

confidence: 99%

Toxicology and safety study of L‐tryptophan and its impurities for use in broiler feed

Ko,

Park,

Lee

et al. 2023

J of Applied Toxicology

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L‐tryptophan has been utilized as a feed additive in animal nutrition to improve growth performance, as well as a dietary supplement to alleviate various emotional symptoms in humans. Despite its benefits, concerns regarding its safety arose following the outbreak of eosinophilia‐myalgia syndrome (EMS) among individuals who consumed L‐tryptophan. The causative material of EMS was determined to be not L‐tryptophan itself, but rather L‐tryptophan impurities resulting from a specific manufacturing process. To investigate the effect of L‐tryptophan and its impurities on humans who consume meat products derived from animals that were fed L‐tryptophan and its impurities, an animal study involving broiler chickens was conducted. The animals in test groups were fed diet containing 0.065%–0.073% of L‐tryptophan for 27 days. This study aimed to observe the occurrence of toxicological or EMS‐related symptoms and analyze the residues of L‐tryptophan impurities in meat products. The results indicated that there was no evidence of adverse effects associated with the test substance in the investigated parameters. Furthermore, most of the consumed EMS‐causing L‐tryptophan impurities did not remain in the meat of broiler chickens. Thus, this study demonstrated the safety of L‐tryptophan and some of its impurities as a feed additive.

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Section: Discussionmentioning

confidence: 99%

Toxicology and safety study of L‐tryptophan and its impurities for use in broiler feed

Ko,

Park,

Lee

et al. 2023

J of Applied Toxicology

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“…Maternal nutrition is an essential factor for the growth and development of offspring; the chicken’s weight is usually 62% to 76% of the hatching egg weight initially, and there is a strong positive correlation between incubation egg weight and chicken weight [ 1 , 2 , 16 – 19 ]. In this study, it was found that the energy-limited diet of broiler chickens significantly reduced the weight of the incubated eggs.…”

Section: Discussionmentioning

confidence: 99%

“…A c c e p t e dA r t i c l e strong positive correlation between incubation egg weight and chicken weight[1,2,[15][16][17][18].…”

mentioning

confidence: 97%

Effects of maternal dietary energy restriction on breast muscle fibre development in the offspring of broiler breeders

Wang

Sun

et al. 2021

Anim Biosci

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Objective: The effects of maternal dietary energy levels on breast muscle fibre development in offspring of broiler breeders were investigated.Methods: A total of 480 20-week-old Arbor Acres (AA) healthy female broiler breeders, with an average body weight of 2.33±0.01 kg, were randomly divided into 4 treatment groups with 6 replicates and 20 broiler breeders for each replicate and fed a corn and soybean meal diet with 100%, 80%, 70%, and 50% energy levels, respectively. Approximately 300 eggs per treatment were collected for incubation for 6 days. Then, 120 0-day-old female broilers at each energy level were randomly selected and divided into 6 replicates with 20 broilers for each replicate, with this experimental phase with the offspring lasting for 49 days.Results: Compared with the 100% energy group, the breast muscle fibre diameter at embryonic day 21 in the 80% energy group was significantly reduced (p<0.05). In the 80% energy group, the muscle fibre density of the breast increased significantly (p<0.05) at embryonic days 15 and 21. The breast muscle fibre diameter of the offspring in each group was significantly decreased (p<0.05) on the 1st day. The breast muscle sarcomere length of the embryos in the 80% energy group was significantly higher (p<0.05) than those in the 70% and 50% energy groups. Compared with the 100% energy group, the expression of the myostatin gene in the offspring was significantly decreased (p<0.05).Conclusion: In conclusion, the effects of a maternal dietary energy level of 80% in this study were found to be optimal for breast muscle fibre development in offspring, which indicated that the metabolic energy level of AA broilers of 9.36 MJ/kg for the mid-term diet for laying eggs has a more practical significance.

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“…There is no contract amongst specific lookup related to the effect of the day old weight on subsequent weight. Some lookup said that the day-old weight have an impact on the average overall performance of broilers [16]; [17] and [18], while distinctive lookup have demonstrated that the versions in day-old weight has a little have an effect on the ordinary overall performance of broilers [19]; [20].…”

Section: Introductionmentioning

confidence: 99%

Genetic and non-genetic factors affecting the body weight of the Kurdish local chicken

Baper

2023

KUJAS

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The current study was conducted at Kani –Graw private field around Erbil city –for the period from 01/09/2022 to 01/05/2023. The study was carried out to know the impact of changes in live weight of Kurdish local chickens due to sex and generation effects. The number of the Kurdish local chicks was two hundred and fifty chicks and their first generation. The effects cleared that, the live weight range substantially in accordance to the sex and generation of the chicks and their interactions especially at some stage in the period from one to eighteen weeks (P<0.01). Also, the live weight in male greater than females and accelerated steadily from zero to eighteen week of age the value the closing weight used to be 1704.06±11.83g and 1380.00±20.50g for males and females parents, respectively and 1649.69±15.64g and 1299.22±10.30g for males and females in 1st generation, respectively. Heritability estimate (h2) indicated that, the heritability estimates for live weight trait. Estimates of h2 two values had been average to excessive the value it ranged from 0.27 to 0.41 for live weight.

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Effect of Sex and Day-Old Weight on Subsequent Body Weight and Body Mass Index in Commercial Broilers

Cited by 3 publications

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Toxicology and safety study of L‐tryptophan and its impurities for use in broiler feed

Toxicology and safety study of L‐tryptophan and its impurities for use in broiler feed

Effects of maternal dietary energy restriction on breast muscle fibre development in the offspring of broiler breeders

Genetic and non-genetic factors affecting the body weight of the Kurdish local chicken

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