Environmental stress and livestock productivity in hot-humid tropics: Alleviation and future perspectives

Oke, O.E.; Uyanga, Victoria Anthony; Iyasere, Oluwaseun S.; Oke, Folasade Olukemi; Majekodunmi, B. C.; Logunleko, M.O.; Abiona, J. A.; Nwosu, E.U.; Abioja, M. O.; Daramola, J. O.; Onagbesan, Okanlawon

doi:10.1016/j.jtherbio.2021.103077

Cited by 32 publications

(22 citation statements)

References 125 publications

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“…Due to their high metabolic rate and physiological state, broiler chickens tend to be more vulnerable to temperature-related stress ( Zhang et al, 2017 ). Under HS conditions, the physiological blood parameters of broilers are altered, which ultimately reduces feed intake, performance, and productivity ( Liu et al, 2019 ; Khan et al, 2021 ; Oke et al, 2021 ). High ambient temperature can also weaken the immune system of broiler chickens ( Siddiqui et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Effects of brown seaweed products on growth performance, plasma biochemistry, immune response, and antioxidant capacity of broiler chickens challenged with heat stress

Akinyemi¹,

Adewole²

2022

Poultry Science

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Section: Introductionmentioning

confidence: 99%

Effects of brown seaweed products on growth performance, plasma biochemistry, immune response, and antioxidant capacity of broiler chickens challenged with heat stress

Akinyemi¹,

Adewole²

2022

Poultry Science

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“…Due to global warming, the Earth’s average surface temperature is rising, causing passive heat stress on the health and performance of animals ( Oke et al., 2021a ). Commercial broilers are especially vulnerable to heat stress due to enhanced metabolic heat generation and reduced heat dissipation capability due to their rapid growth rate ( Sandercock et al., 1995 ).…”

Section: Introductionmentioning

confidence: 99%

“…Heat stress is caused by the relationship between temperature, relative humidity, radiant heat, and air speed. Temperature is the main factor in heat stress causing changes in physiological and metabolic pathways in birds ( Oke et al., 2021a ). However, due to the energy expended to cope with environmental stressors, chickens raised in the tropics cannot reach their genetic capacity during elevated air temperature or high humidity.…”

Section: Introductionmentioning

confidence: 99%

Research Note: Responses of broiler chickens to in ovo feeding with clove and cinnamon extract under hot-humid environments

Akosile¹,

Majekodunmi²,

Sogunle³

et al. 2023

Poultry Science

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“…This situation is exacerbated in chickens as they have no sweat glands and are susceptible to thermal stress. Chickens under heat stress exhibit increased body temperatures, oxidative stress and metabolic amino acid alteration ( Brosnan and Brosnan, 2006 ; Chowdhury et al, 2014 ; Oke et al, 2021a ; Chowdhury et al, 2021 ; Kpomasse et al, 2021 ). In addition to serving as protein building blocks, amino acids act as regulators of gene expression and mediators of phosphorylation of protein cascades.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of in ovo feeding of low or high mixtures of cysteine and lysine on performance, intestinal morphology and physiological responses of thermal-challenged broiler embryos

et al. 2022

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The objective of this study was to evaluate the effect of in ovo feeding cysteine, lysine or their combinations on the perinatal and post-hatch physiological responses of broiler embryos exposed to heat stress during incubation. A total of two thousand fertile eggs of broiler breeders (Ross 308) flock (at 38 weeks of age) were used for this study. In the first 10 days, the eggs were incubated using the conventional protocol of relative humidity and temperature of 55% and 37.8°C respectively. From day ten onward, the temperature was increased to 39.6°C for 6 h per day. On day 17.5, 1,500 eggs with the evidence of living embryos were randomly selected and assigned to 6 treatments having five replicates of 50 eggs each. The treatments were: un-injected eggs (UI), eggs injected with only 0.5 ml distilled water (DW), 3.5 mg/egg cysteine (CY), 2mg/egg lysine (LY), 3.4 mg cysteine+2 mg lysine (CLH) and 1.7 mg cysteine+1 mg lysine (CLL). On day 21, the hatchability, anatomical characteristics, chick quality and the antioxidant status of the chicks were evaluated. During the post-hatch phase, data were collected on the haematology, biochemical parameters, growth performance and intestinal morphology of the birds. The results revealed that the hatchability of CY chicks was higher (p < 0.05) than in the other treatments, while the lowest values were recorded in CLH. The hatching muscle of the chicks of CLL was similar to those of CY but higher (p < 0.05) than the others. The MDA of DW and UI chickens was similar and higher than birds in the other treatment groups. The serum SOD of CLL birds was comparable to that of CY but higher than the values recorded in the other treatments. The final weights of CLL chickens were similar to those of LY but significantly higher (p < 0.05) than those of the other treatments. The duodenal villus heights of the birds of CLL were higher than those of the other treatment groups, whereas the villus height of the birds of CLH was higher than those of UI, DW and CY. Overall, in ovo feeding of cysteine alone improved the hatchability of thermally-challenged broiler embryos. In contrast, a low-dose mixture of cysteine plus lysine improved the post-hatch growth performance.

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Environmental stress and livestock productivity in hot-humid tropics: Alleviation and future perspectives

Cited by 32 publications

References 125 publications

Effects of brown seaweed products on growth performance, plasma biochemistry, immune response, and antioxidant capacity of broiler chickens challenged with heat stress

Effects of brown seaweed products on growth performance, plasma biochemistry, immune response, and antioxidant capacity of broiler chickens challenged with heat stress

Research Note: Responses of broiler chickens to in ovo feeding with clove and cinnamon extract under hot-humid environments

Evaluation of in ovo feeding of low or high mixtures of cysteine and lysine on performance, intestinal morphology and physiological responses of thermal-challenged broiler embryos

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