Effect of cyclic heat stress on thyroidal hormones, thyroid histology, and performance of two broiler strains

Bueno, João Paulo Rodrigues; Gotardo, Luciana Ruggeri Menezes; Santos, Aline Monteiro dos; Litz, Fernanda Heloísa; O, Olivieri; Alves, Rosana; Moraes, Cíntia Amaral; Nascimento, Mara Regina Bueno de Mattos

doi:10.1007/s00484-020-01886-0

Cited by 12 publications

(8 citation statements)

References 25 publications

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“…Reports of Abreu and Abreu [ 3 ] and Bueno et al. [ 4 ] stated that the actual temperature varies from 32°C to 35°C (1st week), 23°C–32°C (2nd and 5th week), and 20°C (6th week) and relative humidity ranging from 60%–70%, which are difficult conditions to keep in the tropics. However, heat stress is one of the most deleterious contentions in tropical and subtropical corridors of the world, which causes substantive economic forfeitures in poultry production [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

“…Poultry birds enjoys to be raised under situations of minor energy requirement for thermoregulation purposes and ultimate net energy available for production goal, otherwise poultry will be under stress [2]. Reports of Abreu and Abreu [3] and Bueno et al [4] stated that the actual temperature varies from 32℃ to 35℃ (1st week), 23℃-32℃ (2nd and 5th week), and 20℃ (6th week) and relative humidity ranging from 60%-70%, which are difficult conditions to keep in the tropics. However, heat stress is one of the most deleterious contentions in tropical and subtropical corridors of the world, which causes substantive economic forfeitures in poultry production [5].…”

Section: Introductionmentioning

confidence: 99%

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Performance, hemato-biochemical indices and oxidative stress markers of broiler chicken fed phytogenic during heat stress condition

Jimoh¹,

Daramola²,

Okin-Aminu³

et al. 2022

J Anim Sci Technol

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Thermal stress is a tremendous health predicament encountered by poultry farmers with adverse effects on the performance, product stature, health condition, survival, and overall welfare of poultry birds, and so requires urgent dietary user-friendly strategy to curb. This study was conducted with 200-day old broilers for the purpose of investigating the potential of phytogenics in refining the negative effects of heat stress on broiler chicken. Moringa, Phyllanthus and mistletoe leaves were processed as phytogenic supplements and incorporated into standard ration for broilers as treatments B1 (control), B2, B3 and B4 diet during the peak of thermal discomfort in humid tropics. Growth and carcass indices were monitored in a 49-day trial and blood samples were harvested at the end of the ordeal period to assess haematology, serum biochemical and oxidative stress markers with the use of standard procedures. The results obtained showed that the prevailing environmental condition in the study site indicated that the birds were exposed to heat stress. Birds fed on moringa and mistletoe supplements had higher performance index than birds without supplementation during heat stress condition, while birds fed on mistletoe supplement had the highest survival rate across the treatments. The liveweight, slaughter weight, dressed weight and eviscerated weight of heat stressed birds fed on moringa, phyllanthus and mistletoe supplements were significantly higher than birds on control treatment. Heterophyl/lymphocyte ratio of heat stressed birds without supplement were higher than birds on phytogenic supplements, with least values recorded in phyllanthus and mistletoe fed birds. Birds on phytogenic supplement tend to have lower cholesterol profile, lipid peroxidation and better antioxidant profile than birds on control treatment during heat stress conditions. Mistletoe supplementation in broiler ration enhances the survival rate, as well as promotes growth indices better among the phytogenic supplements. However, phytogenic supplements did ameliorate the negative effects of thermal discomfort on performance, physiological and oxidative stress in heat-stressed broiler chicken.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Performance, hemato-biochemical indices and oxidative stress markers of broiler chicken fed phytogenic during heat stress condition

Jimoh¹,

Daramola²,

Okin-Aminu³

et al. 2022

J Anim Sci Technol

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“…The same finding was obtained under conditions of prolonged exposure to heat stress at 34 °C for 8 h daily from the 22nd to the 42nd h 49 , as well as in instances where a broiler was subjected to extended periods of heat stress at 36 °C 50 . Similarly, under conditions of cyclic stress, there was a significant rise in plasma cholesterol levels 51 .…”

Section: Discussionmentioning

confidence: 98%

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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“…Therefore, any disruption of thyroid activity can impair performance [10]. In fact, thyroid hormones are considered to have major roles in metabolic processes (catabolism and anabolism), thereby influencing nutritional efficiency, catabolism, anabolic synthesis, and thermogenesis [13].…”

Section: High Stocking Density and Heat Stressmentioning

confidence: 99%

Deleterious Effects of Heat Stress on Poultry Production: Unveiling the Benefits of Betaine and Polyphenols

Shakeri

2022

Poultry

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Managing and controlling environmental temperature conditions using practical strategies is crucial to avoid the negative impacts of high environmental temperature, improving poultry production and welfare. High environmental temperature is one of the significant factors challenging poultry production during hot seasons or in tropical areas causing heat stress (HS). The detrimental effects of HS on broilers range from reduced growth performance to impaired poultry meat quality. HS impairs physiological responses caused by alteration in blood parameters, which could lead to impaired product quality by reducing moisture content and altering the production of antioxidant enzymes resulting in increased oxidative stress. There has been a focus on the use of nutritional supplements as a cost effective HS amelioration strategy, such as betaine and polyphenols. Supplementing broiler chicken’s diets with polyphenols aims to enhance growth performance via reduced levels of oxidative stress in tissues under HS conditions. Furthermore, using betaine as an osmolyte aims to protect tissues during osmotic stress conditions. The current review reveals that betaine and polyphenols are essential under crucial conditions such as HS to protect tissues from oxidative damage.

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Effect of cyclic heat stress on thyroidal hormones, thyroid histology, and performance of two broiler strains

Cited by 12 publications

References 25 publications

Performance, hemato-biochemical indices and oxidative stress markers of broiler chicken fed phytogenic during heat stress condition

Performance, hemato-biochemical indices and oxidative stress markers of broiler chicken fed phytogenic during heat stress condition

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

Deleterious Effects of Heat Stress on Poultry Production: Unveiling the Benefits of Betaine and Polyphenols

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