Behavioural, physiological, neuro-endocrine and molecular responses of cattle against heat stress: an updated review

Mishra, Smruti Ranjan

doi:10.1007/s11250-021-02790-4

Cited by 41 publications

(38 citation statements)

References 239 publications

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“…Although heat stress affects both sexes, reduction of reproductive success is partially explained by the observation that heat exposure alters porcine endometrial tissue during the pre-implantation period resulting in diminished fertility rates in females which might be caused by hormonal dysregulation ( 13 ). Work done in cattle or rats showed similar results by indicating an association of high ambient temperatures and alterations of the estrous cycle ( 14 , 48 ). Thus, it is tempting to speculate that the observed reduction in fertility rates upon heat-exposure in women is also caused by alterations of the menstrual cycle.…”

Section: Heat Stress: a Threat To Reproductive Successmentioning

confidence: 58%

Climate change and pregnancy complications: From hormones to the immune response

et al. 2023

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Pregnant women are highly vulnerable to adverse environments. Accumulating evidence highlights that increasing temperatures associated with the ongoing climate change pose a threat to successful reproduction. Heat stress caused by an increased ambient temperature can result in adverse pregnancy outcomes, e.g., preterm birth, stillbirth and low fetal weight. The pathomechanisms through which heat stress interferes with pregnancy maintenance still remain vague, but emerging evidence underscores that the endocrine system is severely affected. It is well known that the endocrine system pivotally contributes to the physiological progression of pregnancy. We review – sometimes speculate - how heat stress can offset hormonal dysregulations and subsequently derail other systems which interact with hormones, such as the immune response. This may account for the heat-stress related threat to successful pregnancy progression, fetal development and long-term children’s health.

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Section: Heat Stress: a Threat To Reproductive Successmentioning

confidence: 58%

Climate change and pregnancy complications: From hormones to the immune response

et al. 2023

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“…The variation in the concentration of these hormones in cattle, according to Burton (1992) is 57 to 119 nmolL-1 and 52 to 124 ngdl-1, respectively for T4 and T3. Mishara (2020), in a review on the impact of heat stress on the hormonal concentration of cattle, reports blood levels of 28.3 to 65 nmolL-1, for T4 and 130…”

Section: Resultsmentioning

confidence: 99%

Production and hematological parameters of heifers ½ Angus ½ Nellore raised in integrated livestock-forestry system

Gonçalves

Andrighetto

Mateus

et al. 2023

Preprint

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The objective of this study was to evaluate the effect of integrated livestock-forestry system (ILF) in the performance, thermal comfort, hematological and hormonal parameters of ½ Angus ½ Nellore heifers, in summer. Thirty-two heifers were distributed in randomized block design with two treatments and four replications. The treatments were: CPS: Conventional pasture system without trees; ILF: integrated livestock-forestry system with eucalyptus planted in triple lines (386 eucalyptus ha− 1). Forage dry mass (FDM), bromatological and morphological analysis of Marandu palisadegrass, animal performance, ambient temperature (TA), relative humidity (RH), and humidity index (THI), respiratory rate (RR), blood count and hormonal parameters were evaluated. FDM, stem, senescent material and dry matter were lower in the ILF (P < 0.05). The crude protein was high in ILF (P < 0.05). There were no significant difference for final weight and average daily gain between treatments (P > 0.05). The stocking rate and weight gain per area were higher in CPS (P < 0.05). The TA, RH, THI and RR were better in the ILF (P < 0.05). The leukocytes and albumin were higher in the ILF (P < 0.05). There were no significant difference between the treatments for T3, T4 and cortisol (P < 0.05). The ILF reduces FDM depending on shading and promotes relevant changes in the morphological and bromatological composition, but it is not able to change the performance of heifers. The arboreal component improves the thermal comfort indexes, which is reflected in the RR and in the greater number of leukocytes and albumin, showing that ILF is important for the heifers welfare.

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“…The high temperature and humidity index typical of tropical and subtropical climates alters the behavior of breeds from European origin; examples of behavioral changes are a decrease in dry matter intake and the seeking for shade ( Mishra, 2021 ). Moreover, environmental heat stress can affect sperm quality ( Morrell, 2020 ) and reduce bull fertility ( Rahman et al, 2018 ).…”

Section: Gene Editing To Improve Bull Reproduction In Tropical and Su...mentioning

confidence: 99%

Perspectives of gene editing for cattle farming in tropical and subtropical regions

et al. 2022

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Behavioural, physiological, neuro-endocrine and molecular responses of cattle against heat stress: an updated review

Cited by 41 publications

References 239 publications

Climate change and pregnancy complications: From hormones to the immune response

Climate change and pregnancy complications: From hormones to the immune response

Production and hematological parameters of heifers ½ Angus ½ Nellore raised in integrated livestock-forestry system

Perspectives of gene editing for cattle farming in tropical and subtropical regions

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