Heat stress in Murrah buffalo calves

Das, Subrata K.; Upadhyay, R. C.; Madan, M. L.

doi:10.1016/s0301-6226(99)00040-8

Cited by 69 publications

(47 citation statements)

References 10 publications

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“…It has already been reported that exposure of buffaloes to direct solar radiation increased the rectal temperature to 40.5°C after 2 h exposure and a further increase up to 41.5°C after 4 h of exposure [3]. The present investigation was further validated by the study conducted by Das et al [4] who have established a direct relationship between the solar radiation and rectal temperature of buffalo which increased up to 40.8°C when exposed for a longer duration of time. Similarly, Sethi et al [5] reported that the rectal temperature increased to 41.2°C when the buffaloes were exposed to direct sunlight in the summer months (June and July) when the ambient temperature was 45°C.…”

Section: Discussionsupporting

confidence: 79%

“…Buffalo, the principal dairy animal of India, contribute over half of the milk production in the country. The core body temperature of buffalo ranges between 38.5 and 39°C and may reach up to 41.5°C on exposure to solar radiation during summer [3][4][5]. Although, buffalo are very well adapted to hot and humid climatic conditions but selection for this tolerance has traditionally resulted in their impaired productive and reproductive performance [6].…”

Section: Introductionmentioning

confidence: 99%

“…Buffalo are more prone to heat stress due to scarcely distributed sweat glands, dark body colour and sparse hair on body surface [4] and therefore, get easily distressed reducing their reproductive capacity. Studies in cattle suggest that oocytes are directly susceptible to heat stress in addition to the alterations in follicular gonadotropic environment.…”

Section: Introductionmentioning

confidence: 99%

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Developmental competence and expression pattern of bubaline (Bubalus bubalis) oocytes subjected to elevated temperatures during meiotic maturation in vitro

Ashraf

Shah

Saini

et al. 2014

J Assist Reprod Genet

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Objective To determine the direct effect of physiologically relevant high temperatures (40.5 and 41.5°C) for two time periods (12 and 24 h) on bubaline oocytes during in vitro maturation. Method The control group oocytes were cultured at 38.5°C for 24 h. The treatment 1 (T1) and 3 (T3) group oocytes were cultured at 40.5 and 41.5°C respectively, for the first 12 h and at 38.5°C for rest of the 12 h. However, treatment 2 (T2) and 4 (T4) group oocytes were cultured at 40.5 and 41.5°C for complete 24 h. Results Development of oocytes to blastocyst was severely compromised (p<0.001) when matured at 40.5 and 41.5°C for both exposure periods (12 h and 24 h). It was found that the cleavage rates, blastocyst yield and mean cell number decreased remarkably (p<0.001) in the treatment groups compared to control. The relative mRNA expression of heat shock protein (Hsp 70.1, 70.2, 70.8, 60, 10 and HSF1), pro-apoptotic (caspases-3, −7, −8, Bid and Bax) and oxidative stress (iNOS) related genes was significantly higher (p<0.05) in all the treatment groups compared to control. However, mRNA abundance of anti-apoptotic (Bcl-2, Mcl-1, Bcl-xl), glucose transport (Glut1, Glut3 and IGF1R), developmental competence (ZAR1 and BMP15) and oxidative stress (MnSOD) related genes was significantly decreased (p<0.05) in the treatment groups compared to control. Conclusion The present study clearly establishes that physiologically relevant elevated temperatures during in vitro meiotic maturation reduce developmental competence of bubaline oocytes.

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Section: Discussionsupporting

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Developmental competence and expression pattern of bubaline (Bubalus bubalis) oocytes subjected to elevated temperatures during meiotic maturation in vitro

Ashraf

Shah

Saini

et al. 2014

J Assist Reprod Genet

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“…Nos búfalos, a temperatura corporal aumenta com o decorrer das horas do dia, sendo menor no período na manhã e mais eleveda no período da tarde (Anderson, 1988;Das et al, 1999;Magalhães et al, 2006). No caso em estudo, as temperaturas retais podem ter continuado a se elevar até o final da tarde, em função das altas temperaturas ambientais ocorrentes na Amazônia Oriental, durante manhã e tarde.…”

Section: Conforto Ambiental De Bezerros Bubalinos (Bubalus Bubalis LIunclassified

“…É possível estabelecer estratégias de manejo ambiental para minimizar os efeitos climáticos sobre os animais, visando aumentar seu conforto (Das et al, 1999), principalmente em regiões tropicais. Em áreas onde as pastagens são integradas à silvicultura, a temperatura do ar sob a copa de árvores pode ser de 2 a 3 ºC inferior à observada a pleno sol, em virtude da interferência positiva da folhagem na passagem da radiação solar, o que contribui para diminuir a radiação solar sobre os animais em pastejo (Pezo e Ibrahim, 1998).…”

Section: Introductionunclassified

Conforto ambiental de bezerros bubalinos (Bubalus bubalis Linnaeus, 1758) em sistemas silvipastoris na Amazônia Oriental

et al. 2010

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Foi analisado o efeito de dois sistemas silvipastoris nos índices de conforto ambiental e alterações nos parâmetros fisiológicos de bezerros bubalinos criados na Embrapa Amazônia Oriental, Belém-PA (clima Afi), no Período 1 (abril a setembro/2007) e Período 2 (outubro/2007 a março/2008). Foram inseridos onze bezerros no Sistema Silvipastoril 1 (SSP1), que apresentava sombreamento útil nas pastagens de 18 a 21%, e oito no Sistema Silvipastoril 2 (SSP2), sem sombreamento, com lago para banho. Foram mensuradas as variáveis fisiológicas: temperatura retal (TR), frequência respiratória (FR), temperatura da pele (TP), e calculados o Índice de Temperatura e Umidade (ITU) e Índice de Conforto de Benezra (ICB), nos dois períodos experimentais, comparados pelo Teste Tukey (P < 0,05). O ITU apresentou diferença estatística entre horários (P < 0,05) e período do ano (P < 0,05), e oscilou de 73,5 ± 1,3 até 82,2 ± 0,8. A TR apresentou diferença estatística entre horários e períodos do ano (P < 0,05), com amplitude de 38,3 ± 0,26 a 39,3 ± 0,38 °C. A FR apresentou diferença significativa entre horários (P < 0,05), com amplitude de 32,2 ± 9,2 a 56,5 ± 19,0 mov min-1, consideradas acima dos níveis normais, enquanto a TP foi diferente estatisticamente entre períodos e horários (P < 0,05) e variou de 23,6 ± 8,3 a 31,7 ± 5,4 °C. Nos Períodos 1 e 2 e nos dois SSP's, os ICBs estiveram acima do valor ideal, variando de 2,46 ± 0,33 a 3,31 ± 0,62 (SSP1) e 2,42 ± 0,30 a 3,45 ± 0,66 (SSP2).

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Physiological, oxidative and metabolic responses of lactating water buffaloes to tropical climate of South China

Hassan

Tang

et al. 2021

Veterinary Medicine & Sci

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Background Heat stress in tropics is generally associated with significant economic losses resulting from reduced performance, morbidity, and mortality of livestock. To avoid serious consequences of heat stress, it is imperative to better understand the physiological responses and biochemical changes under the state of altered body homeostasis during different seasons of the year. Objectives This study aimed to evaluate the seasonal dynamics of physiological, oxidative and metabolic responses of lactating Nili‐Ravi buffaloes to the tropical climate of South China. Methods Physiological responses including rectal temperature (RT), body surface temperature (BST) and respiratory rate (RR) along with serum biochemical and antioxidant parameters of 20 lactating Nili‐Ravi buffaloes were evaluated during different seasons of the year. Results Higher temperature‐humidity Index (THI) during the summer season (>80) resulted in a significant increases in RR and BST as compared to the winter season. Higher oxidative stress was observed in the summer season as revealed by significantly higher MDA while lower serum antioxidant enzyme (TAC, GSH‐Px, SOD and CAT) contents. Moreover, serum cortisol was also significantly higher in summer and autumn. The levels of growth hormone and ACTH were also significantly (P < 0.05) lower in summer and autumn as compared to other seasons. The negative association of THI with physiological and antioxidant parameters was observed while it was positively associated with serum MDA and cortisol levels. Conclusions Our study revealed moderate heat stress in lactating buffaloes in the summer season which calls for attention to avoid economic losses and animal welfare issues.

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Heat stress in Murrah buffalo calves

Cited by 69 publications

References 10 publications

Developmental competence and expression pattern of bubaline (Bubalus bubalis) oocytes subjected to elevated temperatures during meiotic maturation in vitro

Developmental competence and expression pattern of bubaline (Bubalus bubalis) oocytes subjected to elevated temperatures during meiotic maturation in vitro

Conforto ambiental de bezerros bubalinos (Bubalus bubalis Linnaeus, 1758) em sistemas silvipastoris na Amazônia Oriental

Physiological, oxidative and metabolic responses of lactating water buffaloes to tropical climate of South China

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