Characteristics estimates of thermoregulatory sheep in rainy and dry seasons created in the region Gurguéia Valley, south of the state of Piaui

Luz, Carlos Syllas Monteiro; Junior, Cicero Pereira Barros; Fonseca, Wéverton José Lima; Amorim, Renata Barbosa de; Silva, Luciana Alves da; Lima, Lucas Almeida; Júnior, Severino Cavalcante de Sousa; Santos, Karina Rodrigues dos

doi:10.21708/avb.2014.8.1.3233

Cited by 5 publications

(3 citation statements)

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“…The water salt concentrations at both temperatures significantly changed the RR (P<0.05), with lower values at the lower water salinity level, and RR values were above normal for the species (20-34 breaths min -1 ) (Reece, 1996). The animals exposed to 32 °C had a higher RR, demonstrating that RR elevation is one of the mechanisms used by sheep to dissipate heat to the environment (Eustáquio Filho et al, 2011;Luz et al, 2014). Duarte et al (2014) reported that sheep under water stress and ingesting excessive minerals had tachypnea, tachycardia, and dehydration, as well as high concentrations of sodium and potassium in the blood.…”

Section: Resultsmentioning

confidence: 99%

“…Sweating animal, including sheep, are more tolerant to thermal stress by dissipating the excess heat through sweating and breathing (Lucena, Furtado, Nascimento, Medeiros, & Souza, 2013;Luz et al, 2014;Araújo, Furtado, Nascimento, Medeiros, & Lopes, 2017). Peripheral vasodilation in these animals increases blood flow to the skin, elevating ST (Luz et al, 2014;Torres et al, 2017), which facilitates heat exchange with the environment by non-evaporative processes.…”

Section: Introductionmentioning

confidence: 99%

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Adaptability of sheep to three salinity levels in different environments

Furtado

Carvalho

Neto

et al. 2020

SCA

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The objective of this study is to evaluate physiological parameters and the adaptability of Santa Inês sheep to two climatic conditions 25ºC (within the thermal comfort zone [TCZ) and 32ºC (above the TCZ) and three salinity levels (2.0, 4.0, and 8.0 dS m -1 ). The study was developed in a climatic chamber using 36 uncastrated male sheep. The experimental design was completely randomized with a 2 ´ 3 factorial scheme composed of two temperatures, three water salinity levels, and six repetitions. The physiological variables were not affected by the salinity levels. The rectal and skin temperature and the heart and respiratory rate were higher at 32 °C. However, the rectal temperature was within the normal range for the species. The consumption of water with different salt concentrations did not affect the adaptive responses of the animals and could be an alternative water source for sheep in regions where water has a high salinity level. The respiratory rate of sheep exposed to 32 °C increased to eliminate body heat, and exposure to 25 °C provided greater thermal comfort for the animals.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Adaptability of sheep to three salinity levels in different environments

Furtado

Carvalho

Neto

et al. 2020

SCA

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“…The region has a mean temperature of 27 o C and mean annual rainfall of 1,000 mm, with a dry season extending from May to November and a rainy season from December to April (Luz et al, 2014). The experiments were approved by the Ethics Committee on Animal Experimentation under the protocol number 034/2011.…”

Section: Study Area and Ethical Issuesmentioning

confidence: 99%

Occurrence of Cryptosporidium and Helminthosis in Santa Ines Sheep under Dry and Rainy Season

Abreu¹,

Luz²,

Santos³

et al. 2017

JAS

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Cryptosporidiosis is a parasitic disease caused by a protozoan from the genus Cryptosporidium with cosmopolitan distribution and zoonotic potential. The objective of this work was to determine the occurrence of Cryptosporidium and helminthosis in Santa Ines sheep herd during dry and rainy season. This work was developed at the sheep's breeding sector from the Federal University of Piaui, located in Southern Piauí, Brazil. Fifty sheep kept in a semi-intensive system were used in the experiment using the method according Ritchie, Ziehl-Neelsen and Gordon and Whitlock. Cryptosporidium oocysts were detected in 36% of the animals tested, with 20 males exhibiting a percentage of 50% (10 animals) protozoan in the feces and 50% (10 animals) exhibiting negative results. Among the 30 tested females, 8 (26.6%) were positive and 22 (73.4%) were negative. Concerning the age, 24 animals (48%) were of 0-12 months old, with prevalence of 11 (46%) positive animals showing protozoan in the feces, and 26 animals (52%) between 13-48 months old. The rainy season showed the highest counting of eggs per gram of feces (EPG), reaching a mean value of 2250 thus, a high occurrence of Cryptosporidium was evidenced, with a higher infection degree in young male sheep, predominantly during the rainy season, when a higher EPG was observed.

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Correlation between pre and post-slaughter physiological parameters in lambs

Fonseca

Mendonça

Robaldo

et al. 2020

RSD

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The objective of this study was to obtain information with scientific validity regarding the probable physiological alterations that sheep may suffer in the period prior to slaughter and its relationship with welfare conditions and maintenance of homeostasis. Twenty-nine castrated male lambs were used, clinically healthy, with no defined breed, and aged up to one year. Before slaughter, the heart and respiratory frequencies were measured, as well as the rectal temperature. At the time of bleeding, a blood sample was collected for analysis of hematological parameters (lactic acid, glucose, hematocrit). The mean value found for the rectal temperature was 39.30 ± 0.45 °C, for respiratory rate of 64.10 ± 28.52mov/min, heart rate of 106.90 ± 30.57bat/min, lactic acid of 4.81 ± 1.04mmol/L, glucose of 69.79 ± 10.33mg/dL and hematocrit of 38.93 ± 3.28%. The database analysis showed a low and positive correlation between respiratory rate and rectal temperature. It was concluded that lambs kept at high temperatures showed an increase in respiratory and cardiac frequencies, as well as an intensification of the stress condition reflected by the increase in plasma lactic acid levels.

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Characteristics estimates of thermoregulatory sheep in rainy and dry seasons created in the region Gurguéia Valley, south of the state of Piaui

Cited by 5 publications

References 0 publications

Adaptability of sheep to three salinity levels in different environments

Adaptability of sheep to three salinity levels in different environments

Occurrence of Cryptosporidium and Helminthosis in Santa Ines Sheep under Dry and Rainy Season

Correlation between pre and post-slaughter physiological parameters in lambs

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