Adaptability and growth of Malpura ewes subjected to thermal and nutritional stress

Sejian, Veerasamy; Maurya, V. P.; Naqvi, S. M. K.

doi:10.1007/s11250-010-9633-z

Cited by 103 publications

(66 citation statements)

References 22 publications

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“…However, the mean RR was greater during the dry than during the rainy season. The RT is influenced by the time of day, as AT is greater during the afternoon (Sejian et al 2010;Silva et al 2010). In the dry season, afternoon RR was 36.3 mov/min, indicating that the animals were not subjected to considerable stress during this period.…”

Section: Resultsmentioning

confidence: 99%

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Effects of the dry and the rainy season on endocrine and physiologic profiles of goats in the Brazilian semi-arid region

Ribeiro

Costa

Filho

et al. 2017

Italian Journal of Animal Science

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This study investigated the effect of season on the endocrine and adaptive profiles of a Brazilian Creole goat population in a semi-arid region of Brazil during the dry and the rainy season. We considered physiological, morphological, biochemical, haematological, hormonal and anatomical profiles. The experiment used 80 adult goats (2-to 5-year-old) and lactating (160 ± 14 days of lactation length) goats, with an average daily milk yield of 500.9 ± 13 g. Physiological parameters (rectal temperature, RT; respiratory rate, RR; heart rate, HR; skin temperature, ST) were high (p < .05) in the afternoon in both seasons. There was a significant effect of season (p < .05) on anatomical parameters (hair diameter, HD; hair length, HL; coat thickness, CT). Haematological, biochemical and hormonal parameters were also significantly affected by season (p < .05). We measured the biochemical and hormonal characteristics changes during different seasons; metabolism was reduced during heat stress and accelerated during cold stress. These hormones facilitate the physiological parameters involved in the adaptation process. Our results confirm that the adaptive capacity of the animals cannot be described solely by RT and RR.ARTICLE HISTORY

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Section: Resultsmentioning

confidence: 99%

“…There are many studies on the effect of season on biochemical blood parameters (Sejian et al 2010;Ribeiro et al 2016). In our study, these parameters were significantly different between seasons (p < .05).…”

Section: Resultsmentioning

confidence: 99%

Effects of the dry and the rainy season on endocrine and physiologic profiles of goats in the Brazilian semi-arid region

Ribeiro

Costa

Filho

et al. 2017

Italian Journal of Animal Science

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“…However, both plasma T3 and T4 significantly reduced in GIII as compared to both GI and GII kids, reflecting the severity of nutritional stress in GIII kids. It is an established fact that depression of thyroid function during stress was part of the process of metabolic adaptation, by which the heat production may consequently be maintained at low level [30,31]. In addition, blood thyroid hormones are considered to be good indicators of the nutritional status of an animal [32].…”

Section: Discussionmentioning

confidence: 99%

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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“…However, recent studies showed that other physiological parameters, such as circulating concentrations of thyroid hormones can change depending on the environmental conditions (VERÍSSIMO et al, 2009;MAURYA et al, 2010;KOLUMAN;DASKIRAN, 2011). These hormones are directly involved with metabolic rate regulation and obligatory thermogenesis, thus they have an essential role in thermoregulation and homeothermy.…”

Section: Introductionmentioning

confidence: 99%

Thermoregulatory responses and blood parameters of locally adapted ewes under natural weather conditions of Brazilian semiarid region

et al. 2015

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The effect of the natural weather conditions on respiratory rate, rectal temperature and hematologic parameters such as glucose, total cholesterol, triacylglycerol, total protein, albumin, globulin, red blood cells, microhematocrit, mean corpuscular volume, serum triiodothyronine (T 3 ) and thyroxine (T 4 ) levels was evaluated in red (RMN) and white (WMN) coat colored Morada Nova ewes, of different class of body condition score (CBCS), during the dry (from july to december) and wet (from january to june) seasons, which exhibited different (P<0.05) air temperature, relative humidity and radiant thermal load averages. Tukey's test was used and the difference considered was to P<0.05. Significant greater averages of respiratory rate were observed in the dry period compared to the rainy period (42.26±8.96 and 36.89±8.20 breaths min -1 , respectively), mainly in the RMN (45.54±8.23 breaths min -1 ) compared with the WMN (39.27±8.57 breaths min -1 ). No differences were observed in rectal temperature measurements between the dry and the wet periods (38.59±0.58 and 38.60±0.56 o C, respectively), but the WMN had higher values than the RMN (38.77±0.54 and 38.40±0.54 o C, respectively). The glucose and total cholesterol were higher in the wet season, with no variation due to breed variety and CBCS. The triacylglycerol did not change between breed varieties and seasons. The albumin was similar between varieties and in different seasons, being different in CBCS. Total protein and globulin serum were higher during the wet season, but total protein was higher and globulin was lower in better CBCS. T 3 and T 4 levels were higher in the rainy season (0.25±0.07 and 6.74±11.37 µg dL -1 , for T 3 and T 4 , respectively) than in the dry season (0.18±0.08 and 6.31±1.64 µg dL -1 , for T 3 and T 4 , respectively). The red blood cells showed no difference, but microhematocrit was higher in WMN and in the better CBCS and mean corpuscular volume was higher in the dry season. The concentration of T 3 was lower in the RMN than in the WMN (0.19±0.07 and 0.24±0.08 µg dL -1 , respectively), while T 4 did not differ between them (6.53±1.51 and 6.52±1.46 µg dL -1 , respectively). The Morada Nova sheep showed positive physiological responses to the heat stress, notably an increase of respiratory rate and a reduction of T 3 and T 4 levels. All another hematologic parameters analyzed were within the normal range for all sheep, indicating a good ability to cope with the climatic changes of the Brazilian semiarid region. Both varieties were heat tolerant, but the red variety required major adjustments to maintain homeothermy. Key words: Adaptation, blood metabolites, blood parameters, sheep, thermoregulatory responses, thyroid hormones ResumoNeste estudo foram avaliados os efeitos da época do ano nas características fisiológicas de frequência respiratória e temperatura retal e nos parâmetros hematológicos glicose, colesterol total, triglicerídeos, proteínas totais, albumina, globulina, contagem total de hemácias, hematócrito, volume corpu...

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Adaptability and growth of Malpura ewes subjected to thermal and nutritional stress

Cited by 103 publications

References 22 publications

Effects of the dry and the rainy season on endocrine and physiologic profiles of goats in the Brazilian semi-arid region

Effects of the dry and the rainy season on endocrine and physiologic profiles of goats in the Brazilian semi-arid region

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

Thermoregulatory responses and blood parameters of locally adapted ewes under natural weather conditions of Brazilian semiarid region

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