Heat stress and thermoregulatory responses of goats: a review

Gupta, Mokshata; Mondal, Tanmay

doi:10.1080/09291016.2019.1603692

Cited by 39 publications

(38 citation statements)

References 115 publications

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“…Lower concentrations of circulating T3 and T4 during the HDS as compared with the CDS and RAS has been reported in adult bucks of Sahel goats (Habibu et al, 2017); whereas, the values showed no significant seasonal fluctuation in kids of Sahel goats (Habibu et al, 2016a). Thus, it could be inferred that during the HDS, Sahel bucks simultaneously reduce the production of TSH and thyroid hormones to reduce thermogenic heat production and minimise the impact of heat stress (Indu et al, 2014;Gupta & Mondal, 2019). In the Sahel buck-kids, however, the higher values of circulating TSH may reflect increased production due to reduced responsiveness of the thyroid gland to TSH resulting from heat stressinduced glandular lesions (Nouri et al, 2006) or reduction in glandular secretory activities (Ali et al, 2020).…”

Section: Discussionmentioning

confidence: 94%

Endogenous and seasonal factors influencing circulating thyrotropin concentration in Red Sokoto and Sahel goats

Habibu¹,

Kawu²,

Aluwong³

et al. 2022

Sokoto J. Vet. Sc.

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Through regulating thyroid physiology, thyrotropin influences the activities of thyroid hormones, including thermogenesis and adaptation to ambient thermal challenges. This study aimed at evaluating the influences of some endogenous factors (breed, sex, age and body mass index; BMI) and season on circulating thyrotropin concentration in Red Sokoto and Sahel goats. A total of 120 goats were sampled, comprising Red Sokoto (n = 20) and Sahel (n = 20) goats in each season during the peak of the cold-dry (CDS), hot-dry (HDS) and rainy (RAS) seasons in a tropical Savannah climate. Results revealed that among Red Sokoto goats, bucks had significantly higher (P<0.05) circulating thyrotropin concentration than does during the HDS, while adults had significantly higher values than kids during the RAS. Significant (P<0.05) breed difference was only observed during the HDS, with the Red Sokoto goats having higher values among adult bucks and doelings but lower values than Sahel goats among buck-kids and adult does. Significant (P<0.05) seasonal variation was observed only in male Sahel goats with buck-kids having lower values during RAS as compared with CDS and HDS, while adult bucks had higher values during the RAS as compared with the HDS. A significant positive correlation (r = 0.29; P<0.001) was observed between thyrotropin concentration and BMI in the overall population. It was concluded that circulating thyrotropin concentration was higher in male and adult goats, and the effects of season and breed were sex and age-dependent. Moreover, the direct relationship between thyrotropin concentration and BMI may reflect the role of thyrotropin in the accumulation of body energy reserve in the savannah goats.

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Section: Discussionmentioning

confidence: 94%

Endogenous and seasonal factors influencing circulating thyrotropin concentration in Red Sokoto and Sahel goats

Habibu¹,

Kawu²,

Aluwong³

et al. 2022

Sokoto J. Vet. Sc.

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“…Since heat stress increment from voluntary activity, rumen fermentation, feed digestion, nutrient absorption and metabolism are reduced when feed intake is less, then not as much heat needs to be dissipated by the animals (Lu 1989). However, the productive performances such as growth, milk yield and reproduction are also reduced because the nutrient supply is below requirements for production (Gupta and Mondal 2019). Several phenotypic and genotypic traits, which can a rise over generations through slow modifications as goats adapt to environmental challenges, can impact with the adaptive potential to goats in harsh environmental conditions.…”

Section: Discussionmentioning

confidence: 99%

Effects of coat color pattern and sex on physiological traits and heat tolerance of indigenous goats exposed to solar radiation

Baenyi

Birindwa

Mutwedu

et al. 2020

JABB

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In this century, climate change is one of the major problems affecting livestock productivity. This study aimed at evaluating the effect of body coat color pattern and sex on heat regulation and heat stress tolerance in indigenous goat breeds exposed to solar radiation. In the experiment, 4 bucks and 4 does (8 to 9 months age) with black, white, grey and brown coat color were selected and exposed to solar radiation during 12 days during the summer period. Water and feed were served add libitum. The consumption were measured daily at 17:00 for each animal. Rectal temperature (RT) and rate pulse (PR) were measured three-time (7:00, 12:00, and 17:00) every day on each animal during the experimental period. At the end of the experiment, blood samples were collected from the jugular vein and immediately delivered to the lab to determine biochemical (serum protein: albumin and globulin), and hematological parameters. Exposing goats to temperature variation affected the physiological, hematological as well as biochemical parameters in all subjects. The female with a black body coat color was mostly affected. The heat stress induced an increase of RT and PR, an increase in water consumption while depression in food intake was observed. Blood platelets, hematocrits, red cell distribution, white blood cell and albumin were damaged in goats with black coat color compared to goats with white coat color. These variations in physiological, hematological and biochemical parameters in female black goat could affect its productive and reproductive performances in high-temperature environments.

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“…The main factors for retardation of animal body growth can be the declined activity anabolism, decreased voluntary water intake and decreased feed consumption. Essential supplement nutrients are needed for metabolizable energy which gives proper nourishment, body weight gain and improved tissue catabolism (Gupta and Mondal, 2021).…”

Section: Body Weight Responsementioning

confidence: 99%

“…In general, the biochemical blood profile indicates the health status, metabolic activities and nutritional conditions of the animal (Calamari et al, 2016). Heat stress changes the blood plasma content of various blood biochemical parameters such as total protein, total cholesterol, glucose, globulin and albumin (Gupta and Mondal, 2021). The general fluctuations in blood biochemical parameters of animals in cold and heat stress environments can be due to the inadequacy to adapt in diversified climatic and geographic circumstances which is necessary for their survivability (Banerjee et al, 2015;Singh et al, 2016).…”

Section: Blood Biochemical Responsementioning

confidence: 99%

Heat Stress Responses in Small Ruminants under Arid and Semi-arid Regions of Western India: A Review

Bhateshwar

Chandra

Datt

2022

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The main purpose of this review was to demonstrate the current state of the investigations on the responses of body weight, physiological and blood biochemical variables in the small ruminants (sheep and goats) reared in hot arid and semi-arid regions of western India. In recent years, scientific research has made it possible to measure how different breeds of sheep and goat respond to climatic influences and manage to be homoeothermic and adapt to various environmental conditions. The exposure of sheep and goats to heat stress leads to alterations in the physiological and biochemical profiles of blood and also affect the body weight, rectal temperature, respiratory rate, pulse rate, blood plasma properties, production, reproduction, milk quantity and its quality. There are some studies which prove that the central nervous system is susceptible to the deviations in body temperature and also that some cells are more agile in the cold than in heat. In summary, we mention that in different breeds, the rearing environment and its environmental variability can trigger the feed intake efficiency and utilization, body growth, physiological changes and biochemical changes in the blood which lead to heat increment in the body’s thermal balance.

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Heat stress and thermoregulatory responses of goats: a review

Cited by 39 publications

References 115 publications

Endogenous and seasonal factors influencing circulating thyrotropin concentration in Red Sokoto and Sahel goats

Endogenous and seasonal factors influencing circulating thyrotropin concentration in Red Sokoto and Sahel goats

Effects of coat color pattern and sex on physiological traits and heat tolerance of indigenous goats exposed to solar radiation

Heat Stress Responses in Small Ruminants under Arid and Semi-arid Regions of Western India: A Review

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