Effect of Pre- and Post-hatch Thermal Conditioning on Productive Performance, Some Metabolic Hormones and Breast Muscles Growth of Broilers Chicks

Abdel-Fatt, S.A.; Shourrap, Mohamed; Hemida, Mona A.

doi:10.3923/ajava.2018.369.376

Cited by 5 publications

(3 citation statements)

References 19 publications

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“…Additionally, these findings align with 69 , who demonstrated that subjecting embryos to heat conditioning at 39.5 °C for 5 h per day during the E16 to E18 timeframe significantly amplified the count of myocytes. This increase was observed to influence myocyte dimensions and cross-sectional area, leading to substantial post-hatch growth among the thermally conditioned groups compared to the control groups.…”

Section: Discussionsupporting

confidence: 87%

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Growth performance, histological and physiological responses of heat-stressed broilers in response to short periods of incubation during egg storage and thermal conditioning

Abdel-Fattah,

Madkour,

Hemida

et al. 2024

Sci Rep

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The short periods of incubation during egg storage (SPIDES) method enhances the quality of chicks and improves hatching rates. Additionally, embryonic thermal conditioning (TC) is a technique used to enhance thermotolerance in birds. Previous studies have evaluated the effects of SPIDES and embryonic TC separately. Yet, our hypothesis postulated that a synergistic effect could be achieved by integrating TC and SPIDES, thereby enhancing the broilers' resilience to thermal stress. We conducted an experiment involving 800 Ross broiler eggs, divided into two groups. The first group, referred to as S0, was maintained under standard storage room conditions and acted as our control group. The second group, known as S1, underwent a process called SPIDES for 5 h at a temperature of 37.8 ± 0.1 °C, on three occasions: days 5, 10, and 15 following egg collection. Upon reaching the 14th day of incubation (DOI), each of these primary groups was randomly subdivided into two equal subgroups. The control subgroup, designated as TC0, remained in the usual incubation conditions. Meanwhile, the other subgroup, TC1, was subjected to prenatal heat conditioning at a temperature of 39.5 ± 0.1 °C for 6 h per day, commencing on the 14th embryonic day (E) and extending until the 18th embryonic day (E). This experimental setup resulted in four distinct experimental subgroups: S0TC0, S1TC0, S0TC1, and S1TC1. The findings indicated that the combined application of SPIDES and TC had a significant positive effect on chick performance after hatching. Specifically, the (S1TC1) group exhibited the heaviest live body weight (LBW) and body weight gain (BWG) at the marketing age in comparison to the other groups. Furthermore, both SPIDES and TC had a positive influence on the relative weights of breast muscles and their histological measurements. The (S1TC1) group displayed significantly higher values in terms of the relative weight of breast muscles and the number of myocytes. In conclusion, SPIDES and TC have beneficial effects on pre- and post-hatch characteristics of broiler chicks up until the marketing age. Additionally, TC techniques improve chick performance, particularly under conditions of heat stress, and enhance the yield of breast muscle in later stages of life.

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Section: Discussionsupporting

confidence: 87%

“…This, in turn, contributed to an increased yield of breast muscles at the time of market age. This concept aligns with the outcomes of 69 .…”

Section: Discussionsupporting

confidence: 56%

Growth performance, histological and physiological responses of heat-stressed broilers in response to short periods of incubation during egg storage and thermal conditioning

Abdel-Fattah,

Madkour,

Hemida

et al. 2024

Sci Rep

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“…The late stage of embryonic development, when neural circuits are shaped, and the first week of age of broiler chicks are high critical periods which thermal control establishment completes developing (Hensch, 2004). The thermal conditioning during pre‐ or post‐hatch stages is an effective strategy to alleviate the impacts of heat stress on broiler chickens (Abdel‐Fattah et al, 2018). This practice involves exposing birds to an elevated ambient temperature for a few hours during the second half of the embryonic development or during their first week of life, to modify their thermoregulatory response and improve their ability to cope with heat stress during the growth phase (Tona et al, 2008; Yahav & Mcmurtry, 2001).…”

Section: Introductionmentioning

confidence: 99%

Growth performance and hepatic antioxidants responses to early thermal conditioning in broiler chickens

Madkour

Aboelazab

El-Azeem

et al. 2022

Animal Physiology Nutrition

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There are little data about antioxidants’ status responses to early thermal conditioning (TC) on broiler chickens. Therefore, the present study was conducted to investigate the different time ages of thermal conditioning on antioxidants responses and the growth rate of broiler chicks. A total of two hundred forty‐one‐day‐old male broiler chicks (Cobb 500) weighed on average 51.5 ± 0.5g were randomly distributed into four equal groups (60 chicks each), and chicks of each group were ranked in five replicates. The first group reared under the ambient temperature, while the second, third and fourth groups (TC3, TC5 and TC7) were subjected to early‐age thermal conditioning at 39°C for 6 h on the third, fifth and seventh day of age respectively. Broilers were fed ad‐libitum, and drinking water was a free choice during the experimental period. At the end of the experimental period that lasted 5 weeks, all experimental groups were exposed to heat challenge at 36°C for 6 h. Early‐age thermal conditioning did not affect growth performance. Plasma corticosterone elevation in TC5 (as a post‐challenge response) was the lowest among the experimental groups. Hepatic malondialdehyde significantly increased in TC5 and TC7 groups both at the post‐conditioning stage and at the end of the experimental period. Hepatic glutathione, glutathione S‐transferases, catalase and superoxide dismutase significantly decreased by early‐age thermal conditioning compared with non‐conditioned broilers. Microscopic examination of the liver sections from broilers chickens in TC5 and TC7 groups showed all the basic features of normal liver tissue, while the control and TC3 groups showed few necrotic areas. It could be concluded that early‐age thermal conditioning at 39°C for 6 h on the fifth day of age could improve the antioxidant defence system of broilers without any adverse effects on growth performance.

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Effect of thermal conditioning on growth performance and thermotolerance in broilers: A systematic review and meta-analysis

Ncho

Gupta

Goel

2021

Journal of Thermal Biology

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Effect of Pre- and Post-hatch Thermal Conditioning on Productive Performance, Some Metabolic Hormones and Breast Muscles Growth of Broilers Chicks

Cited by 5 publications

References 19 publications

Growth performance, histological and physiological responses of heat-stressed broilers in response to short periods of incubation during egg storage and thermal conditioning

Growth performance, histological and physiological responses of heat-stressed broilers in response to short periods of incubation during egg storage and thermal conditioning

Growth performance and hepatic antioxidants responses to early thermal conditioning in broiler chickens

Effect of thermal conditioning on growth performance and thermotolerance in broilers: A systematic review and meta-analysis

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