Physiological responses of Santa Inês x Dorper ewes and lambs to thermal environment of silvopasture and open pasture systems

Santos, Matheus Luquirini Penteado dos; Dada, Julia Morgana Vieira; Muniz, Pricilla Carvalho; Zotti, Maria Luísa Appendino Nunes; Barros, Flávia Regina Oliveira de; Vieira, Frederico Márcio Corrêa

doi:10.1016/j.smallrumres.2021.106565

Cited by 9 publications

(5 citation statements)

References 36 publications

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“…A person positioned 1 m from the animal measured the temperature at five points on the animal: head, neck, back, flank, and hind limb at thigh height. Then, the simple arithmetic average of the measured temperatures was calculated, as in previous studies [5,7].…”

Section: Evaluation Of Physiological Variablesmentioning

confidence: 99%

“…However, our results showed that the recruitment of WBCs was not affected by direct exposure to solar radiation (Table 1). Although some studies analyze the physiological [5], behavioural [7], and biochemical [34] response to heat stress in a silvopastoral system, the literature lacks information regarding the mobilization of leukocytes in adult sheep, whether heat-stressed or in a shaded production system. HS is commonly known to affect leukocyte concentration in broiler chickens [35], dairy cattle [36], human workers [37], and even Australian abalone [38].…”

Section: Leukocytesmentioning

confidence: 99%

“…In warm-blooded animals, behavioural change is the first mechanism for achieving body heat loss when the ambient temperature is high, followed by increased respiratory and heart rates [6]. As noted above, a high ambient temperature results in behavioural and other physiological changes in animals, affecting food and water intake, growth, reproduction, and milk production, in addition to haematological changes and changes in plasma concentrations of cortisol and thyroid hormones [5,7,8].…”

Section: Introductionmentioning

confidence: 99%

“…Heat stress is caused by a combination of high temperature and relative humidity. This causes animal behavioural and physiological changes, affecting food and water intake, growth, reproduction, milk production, haematological changes, and concentrations of cortisol and thyroid hormones in plasma [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

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Placental Development and Physiological Changes in Pregnant Ewes in Silvopastoral and Open Pasture Systems during the Summer

Dada

Santos

Dani

et al. 2023

Animals

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This study aimed to analyze the reproductive and physiological changes in ewes subjected to heat stress during pregnancy at UTFPR-Brazil. Twenty-four pregnant crossbred ewes were kept in a silvopastoral system (SP) or an open pasture system (OP) throughout the final trimester of pregnancy. Both systems were stressful, but the SP system had lower air temperature than the OP system (26.0 ± 0.38 and 26.9 ± 0.41 °C, respectively; p = 0.0288). Moreover, the radiant thermal load of the two groups presented a difference of 34 Wm−2 (p = 0.0288), and the grass temperature was also lower in the SP system compared to that in the OP system (23.4 ± 0.37 and 25.6 ± 0.44 °C, respectively; p = 0.0043). The respiratory and heart rates of animals from the OP group were higher than those from the SP group (p < 0.001), but no difference was observed in the mobilization of white blood cells (p = 0.4777), and the neutrophil count was only affected by time (p < 0.0001). As regards placental biometry, placentas in twin pregnancies had a greater membrane area (p = 0.0223), but no differences between the systems were observed in placental weight (p = 0.1522) and the number of cotyledons (p = 0.5457). We concluded that the type of rearing system used affects the thermal comfort of pregnant ewes, and that an SP system can offer more amenable microclimatic conditions, which result in greater comfort for the ewes.

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Section: Evaluation Of Physiological Variablesmentioning

confidence: 99%

Section: Leukocytesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Placental Development and Physiological Changes in Pregnant Ewes in Silvopastoral and Open Pasture Systems during the Summer

Dada

Santos

Dani

et al. 2023

Animals

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“…1Santos et al (2021). Means with different letters (lowercase for rows) differ among themselves (T test; P<0.05)…”

mentioning

confidence: 95%

Performance, body measurement, physiological adaptability and metabolic status of Garut sheep raised in a pen-intensive system in Indonesia

Mayasari,

Maulana,

Mustafiddin

et al. 2023

J. Anim. Behav. Biometeorol.

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Small ruminant production systems that utilize pen-intensive systems have become more popular in Indonesia during the past few decades. It is well recognized that allowing sheep freedom to move freely outside can significantly improve their health and welfare. This study used a T test experimental design with ten replicates to compare the performance, body measurements, physiological adaptability, and metabolic status of Garut sheep raised in pen-intensive management with two different treatments (outdoor pen access vs. full indoor pen). A twenty-one-year-old sheep with an average body weight of 19.57±2.50 kg was employed in this experiment. The findings showed that neither treatment's dry matter intake (grams per head per day) nor average daily gain (grams per head per day) differed (P>0.05), but the ewes exposed to outdoor pen access had significantly longer bodies (P≤0.05) than those in the full indoor pen. The physiological health of the ewes having access to the outdoor enclosure was similarly improved (P≤0.05), especially in the morning and afternoon. Apart from plasma glucose levels, the metabolic status of the ewes in both treatment groups was similar, with the exception that the ewes with access to an outdoor enclosure had lower blood glucose (P≤0.05). Furthermore, the adaptability coefficient value was lower (P≤0.05) in compared with those without access to outdoor pen, with no different (P>0.05) in Heat Tolerance Coefficient value. In conclusion, a pen-intensive system with an outside enclosure not only increases the performance of garut ewes but also improves their physiological adaptability. This approach can be highly promoted to improve sheep farming management in Indonesia.

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Nutritional strategies, performance, digestibility, and carcass traits of Santa Ines and Rabo Largo breeds in a tropical climate

Pereira,

de Oliveira Maia Parente,

de Sousa

et al. 2024

Trop Anim Health Prod

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Physiological responses of Santa Inês x Dorper ewes and lambs to thermal environment of silvopasture and open pasture systems

Cited by 9 publications

References 36 publications

Placental Development and Physiological Changes in Pregnant Ewes in Silvopastoral and Open Pasture Systems during the Summer

Placental Development and Physiological Changes in Pregnant Ewes in Silvopastoral and Open Pasture Systems during the Summer

Performance, body measurement, physiological adaptability and metabolic status of Garut sheep raised in a pen-intensive system in Indonesia

Nutritional strategies, performance, digestibility, and carcass traits of Santa Ines and Rabo Largo breeds in a tropical climate

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