Thermoregulatory response of goat kids subjected to heat stress

Al-Tamimi, Hosam J.

doi:10.1016/j.smallrumres.2006.04.013

Cited by 84 publications

(42 citation statements)

References 20 publications

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“…PR showed similar tends both during morning and afternoon with the lowest values recorded in both GIII and GII as compared to GI. This reduction could be achieved by the animal either by reduced intake or by activity reduction or both [23]. RT also was recorded the lowest in GIII as compared to GI and GII.…”

Section: Discussionmentioning

confidence: 89%

Effect of Different Diet Level on the Physiological Adaptability, Biochemical and Endocrine Responses and Relative Hepatic HSP70 and HSP90 Genes Expression in Osmanabadi Kids

Sejian¹,

Bagath²,

Parthipan³

et al. 2015

JAST-A

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Abstract:The study was conducted to investigate the impact of different levels of feed on the adaptive capability based on physiological, blood biochemical, endocrine and molecular mechanisms in growing Osmanabadi kids. The primary objective of the study was to identify if HSP70 and HSP90 can be a nutritional stress marker for goat. The study was conducted for a period of two months. The animals were randomly divided into three groups as GI (n = 6; ad libitum feeding), GII (n = 6; 20% less than ad libitum) and GIII (n = 6; 40% less than ad libitum). The animals were fed with feed consisting of 50% roughage and 50% concentrate. Blood collection was carried out at fortnightly intervals. Body weights were recorded at weekly interval. Physiological responses, biochemical responses, plasma tri-iodo-thyronine (T 3 ), thyroxin (T 4 ) and cortisol were recorded at fortnightly interval. At the end of study period, only GI and GIII animals were slaughtered and different organs were collected for histopathological studies as well as for hepatic HSP70 and HSP90 mRNA transcript expression. Body weight recorded showed significant (P < 0.01) differences between the groups. Physiological responses showed significant (P < 0.01) variation among the groups. Among the biochemical parameters, plasma glucose and total plasma protein and globulin showed significant (P < 0.01) differences between the groups. Plasma T3 (P < 0.01), T4 (P < 0.01) and cortisol (P < 0.05) also differed significantly between the groups. The relative hepatic HSP70 mRNA transcript expression was significantly (P < 0.05) higher in GIII (2.8 fold) as compared to GI (1 fold) kids. Similar result was obtained for hepatic HSP90 mRNA transcript expression. From the results, it can be concluded that Osmanabadi kids possessed the ability to alter their adaptive mechanisms to maintain homeostasis. Further, the study revealed the significance of providing the optimum nutrition for these animals to adapt to existing environmental conditions. The study also established that respiration rate (RR), rectal temperature (RT), T 3 , T 4 and cortisol are considered as nutritional stress markers for goat. Further, the results revealed that probably this is the first study to establish the nutritional stress impact on heat shock protein (HSP) expression in goats. The study identified both HSP70 and HSP90 to be the ideal molecular markers for feed deficit in goats.

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Section: Discussionmentioning

confidence: 89%

Effect of Different Diet Level on the Physiological Adaptability, Biochemical and Endocrine Responses and Relative Hepatic HSP70 and HSP90 Genes Expression in Osmanabadi Kids

Sejian¹,

Bagath²,

Parthipan³

et al. 2015

JAST-A

View full text Add to dashboard Cite

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“…The increased muscle activity to control the simultaneous increase in respiratory rate and a reduction in peripheral vascular resistance promotes greater blood circulation to dissipate heat through the skin, which are attributes that make the heart rate increase (Al-Tamimi 2007). Increase in the pulse rate will increase the flow of blood from the core to the periphery of the body, resulting in higher heat loss by sensible means (loss by conduction, convection, and radiation) and insensible means (loss of water by diffusion from the skin) (Marai et al 2007).…”

Section: Physiological Variablesmentioning

confidence: 99%

Physiological and biochemical blood variables of goats subjected to heat stress – a review

Ribeiro

Bozzi

et al. 2018

Journal of Applied Animal Research

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The aim of this review was to understand the role of physiological, hematological, biochemical and hormonal variables of the blood of goats raised in adverse environments. Scientific work in recent years has allowed for the evaluation of how goats of various breeds respond to edaphoclimatic effects to maintain homeothermy according to adaptability to the environment. The exposure of goats to heat stress causes changes in the physiological functions with impact on production and productivity of the animals. There is evidence that the central nervous system is sensitive to temperature changes, and some cells are agiler in the cold than in heat. In conclusion, we say that regardless of the breed, the raising environment and its climatic variables can trigger physiological, biochemical, hematological and hormonal alterations that result in a reduction of the heat production for maintenance of homeothermy. All these changes have a substantial impact on production and productivity.

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“…Studies carried out on newborn calves, lambs and kids demonstrated that the respiratory, cardiovascular and thermoregulatory function of these livestock species is subjected to several adjustments following the transition from the controlled uterine environment to the free-living state (Nowak and Poindron, 2006;Al-Tamimi, 2007;Ocak et al, 2009;Piccione et al, 2010Piccione et al, , 2013Davey et al, 1998). These physiological functions are also influenced by the birth weight of the animal (De Matteo et al, 2008;Chniter et al, 2013), which in turn depends on fetal physiological adaptations made in response to the intrauterine conditions (De Matteo Published by Copernicus Publications on behalf of the Leibniz Institute for Farm Animal Biology.…”

Section: Introductionmentioning

confidence: 99%

Physiological differences between twin and single-born lambs and kids during the first month of life

et al. 2016

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Abstract. The effects of time after birth and of twinning on rectal temperature (RT), heart rate (HR), respiratory rate (RR) and body weight (BW) values were evaluated in five singleton Comisana lambs (three males and two females), five singleton Maltese Kids (three males and two females), four couples of twin Comisana lambs (four males and four females) and four couples of twin Maltese kids (four males and four females) during the first month of life. For all kids and lambs, RT, HR, RR and BW were recorded after 1 and 24 h from birth and every 2 days until the 30th day of life. The application of two-way repeated measures analysis of variance (ANOVA) showed a statistically significant effect of time (P < 0.0001) on RT, HR, RR and BW values in all lambs and kids during the first month of life. Any significant effect of twinning (P > 0.05) on all studied parameters was found in lambs, whereas statistically significant differences in BW, RT and HR values (P < 0.01) were found between twin and singleton kids throughout the first month of life. The results obtained in this study make a contribution to the knowledge of homeostatic, cardiorespiratory and thermoregulatory adaptations occurring in singleton lambs and kids and in twin lambs and kids during the first 30 days of life. Our findings indicate that the BW, RT, HR and RR values, whose homeostasis is still evolving in newborn, should be interpreted dynamically as a function of the period of postnatal adaptation and also of twinning.

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Thermoregulatory response of goat kids subjected to heat stress

Cited by 84 publications

References 20 publications

Effect of Different Diet Level on the Physiological Adaptability, Biochemical and Endocrine Responses and Relative Hepatic HSP70 and HSP90 Genes Expression in Osmanabadi Kids

Effect of Different Diet Level on the Physiological Adaptability, Biochemical and Endocrine Responses and Relative Hepatic HSP70 and HSP90 Genes Expression in Osmanabadi Kids

Physiological and biochemical blood variables of goats subjected to heat stress – a review

Physiological differences between twin and single-born lambs and kids during the first month of life

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