Postpartum behavioural response of Santa inês x dorper ewes and lambs in a silvopastoral system

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

doi:10.1016/j.smallrumres.2021.106495

Cited by 4 publications

(9 citation statements)

References 24 publications

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“…It was not possible to assess the microclimate within each grazing system to verify the impact of shading on the time allocated by the lambs to water intake. Nevertheless, Dada et al (2021) developed an experiment in the same area where the present study was carried out and found a significant difference between the microclimatic data obtained in the silvopastoral system and pasture without shading. The average temperature was 1.1°C lower in silvopastoral, while the relative humidity and wind speed presented values of 65 ± 12.4% and 63 ± 12.2%, and 1.4 ± 0.06 ms -1 and 1.1 ± 0.03 ms -1 for silvopastoral and unshaded pasture, respectively.…”

Section: Resultsmentioning

confidence: 70%

“…On the other hand, there was no difference in the time for water intake in the silvopastoral system and the pasture system without shading. One of the main advantages of the silvopastoral system is providing shade for the animals, reducing the heat load to which the animals are exposed (Dada et al, 2021). In this sense, sheep in a silvopastoral system have the potential to store less heat throughout the day, requiring less water to dissipate heat through evaporative cooling mechanisms (Vieira et al, 2021).…”

Section: Resultsmentioning

confidence: 99%

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Influence of pasture, silvopastoral, and feedlot production systems and the recording interval of behavioral activities on the ingestive behavior of lambs

Bettencourt

Silva

Menezes

et al. 2022

Semina: Ciênc. Agrár.

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The evaluation of the ingestive behavior of ruminant animals is important to identify the animal response to the particularities of the different production systems. However, the five-minute evaluation technique requires personnel, making it difficult to adhere to farms and research in more complex pastoral systems. Thus, this study objected to evaluating the influence of pasture, silvopastoral, and feedlot production systems on the ingestive behavior of lambs and to defining the behavior recording interval in each of the systems. Twenty-four lambs were distributed in an experimental design in split plots. The plots were the production systems (pasture without shading - PS, silvopastoral - SS, and feedlot systems - FS) and the subplots were the behavior observation intervals (5, 10, 15, and 20 min.). In the pasture without shading and silvopastoral systems, the lambs were kept on Aruana grass (Megathyrsus maximus) pasture and supplemented with concentrate at 1.5% of body weight per day, on a dry matter (DM) basis. In the feedlot system, the lambs received a diet consisting of 200 g kg DM-1 of annual ryegrass hay (Lolium multiflorum Lam.) and 800 g kg DM-1 of concentrate. There was no interaction (P > 0.05) between the production system and the recording interval of behavioral activities. The time spent on food intake was higher (P < 0.05) in the pasture (533 min d-1) and silvopastoral (513 min d-1) systems than in the feedlot (225 min d-1). In contrast, for water intake, time was higher (P < 0.05) in the feedlot (21 min d-1) and lower in the silvopastoral system (5 min d-1). There was no difference (P > 0.05) between the systems for rumination and idle activities, of which daily averages were 378 and 587 min d-1, respectively. There was also no difference (P > 0.05) between the observation intervals for feed, water, rumination, and idleness activities. Lambs in pasture-based systems spend more time feeding, and feedlot lambs spend more time ingesting water. Feedlot lambs ruminate as much as grazing animals when fed hay, even though hay represents only 20% of the total diet. The recording interval of behavioral activities in these production systems can be up to 20 minutes.

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Section: Resultsmentioning

confidence: 70%

Section: Resultsmentioning

confidence: 99%

Influence of pasture, silvopastoral, and feedlot production systems and the recording interval of behavioral activities on the ingestive behavior of lambs

Bettencourt

Silva

Menezes

et al. 2022

Semina: Ciênc. Agrár.

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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%

“…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%

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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“…Prior research has demonstrated that silvopasture has the potential to alleviate heat stress in young animals, such as dairy heifers [9]. In a recent study, Dada et al [30] showed that both lambs and ewes exhibited reduced panting and more lying behaviour than animals kept in an unshaded system. However, there are information gaps regarding the influence of SP on thermoregulatory variables and the behaviour and welfare of lambs in a subtropical climate.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Silvopastoral System on the Thermal Comfort of Lambs in a Subtropical Climate: A Preliminary Study

et al. 2021

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The silvopastoral system has the potential to alleviate the negative impacts of heat stress on livestock. Through a preliminary study, we assessed the thermal environment experienced by hair coat lambs, as well as the impacts on their bio-thermal and behavioural responses, when either kept in either the silvopastoral system, or exposed to full sun. Twelve hair coat lambs (Dorper × Santa Ines) were randomly assigned to a silvopastoral system or full sun exposure during the summer (from January to February 2017). Parameters, including air temperature, black globe temperature, relative humidity, wind speed, and ground surface temperature, were measured daily for both thermal environments. From 14:00 to 16:00, lambs kept in silvopastoral areas experienced lower levels of air temperature, radiant heat load, and ground surface temperature. Consequently, they had a lower hair coat surface and lower body rectal temperatures. Lambs exposed to a shaded environment spent more time grazing and walking, and less time standing at rest. In conclusion, lambs kept in a silvopastoral system experienced lower levels of radiant heat load and ground surface temperature. In addition, the animals showed a reduced requirement for evaporative cooling and expressed behaviours that indicated a comfortable thermal environment.

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Postpartum behavioural response of Santa inês x dorper ewes and lambs in a silvopastoral system

Cited by 4 publications

References 24 publications

Influence of pasture, silvopastoral, and feedlot production systems and the recording interval of behavioral activities on the ingestive behavior of lambs

Influence of pasture, silvopastoral, and feedlot production systems and the recording interval of behavioral activities on the ingestive behavior of lambs

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

Effect of the Silvopastoral System on the Thermal Comfort of Lambs in a Subtropical Climate: A Preliminary Study

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