Parâmetros fisiológicos de ovinos Santa Inês submetidos a sombreamento com tela de polipropileno

Oliveira, Fabiano A. de; Turco, Sílvia Helena Nogueira; Borges, I.; Clemente, Carlos Aparício; Nascimento, T. V. C.; Filho, João B. Loiola

doi:10.1590/s1415-43662013000900015

Cited by 10 publications

(13 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For BGTHI, no significant difference was found for EXT and SHA (P<0.01), which presented values of 79.9 and 77.25, respectively. OLIVEIRA et al (2013), also using polypropylene mesh (80% shade) for shading paddocks, observed a proportional decrease similar to that found in this study, with an average value of 85.39 in the external environment and 81.57 in the shaded environment.…”

Section: Resultssupporting

confidence: 88%

Physiological Responses of Dairy Cows as a Function of Environment in Holding Pen

Silva

Passini

2017

Eng. Agríc.

View full text Add to dashboard Cite

This research aimed to assess the climatization configuration in a holding pen for dairy cattle considering physiological responses of animals and thermal comfort indexes. Experimental design consisted of 16 cows in a Latin square design containing four groups of four animals (G1, G2, G3 and G4) and four periods (P1, P2, P3 and P4), in which four environments were used as treatments: EXT -external environment (control); SHA -shading with polypropylene mesh, 80% light interception; S+S -shading and water sprinkling; and S+S+V -shading, sprinkling and ventilation. Dry and wet bulb temperature, black globe temperature, wind speed and humidity were recorded during the climatization process, between October 13 and December 7. Subsequently, temperature-humidity index (THI), black globe temperature and humidity index (BGTHI), radiant heat load (RHL) and heat load index (HLI) were calculated. After climatization, respiratory rate (RR), surface temperature (ST), and rectal temperature (RT) were recorded. Animals submitted to EXT presented physiological responses that indicated heat stress. The best physiological response was found in S+S+V, which reduced RR by 58.6% when compared to the other environments.

show abstract

Section: Resultssupporting

confidence: 88%

Physiological Responses of Dairy Cows as a Function of Environment in Holding Pen

Silva

Passini

2017

Eng. Agríc.

View full text Add to dashboard Cite

show abstract

“…The pattern of behavior during daytime observed in sheep is in agreement with what was observed by OLIVEIRA et al (2013), in which they describe that the peak of grazing are at the beginning and at the end of the day.…”

Section: Pattern Of Behavior Over the Main Hours Of The Daysupporting

confidence: 90%

Behavioral aspects of Santa Inês sheep kept in pasture in a tropical rainforest climate

et al. 2019

View full text Add to dashboard Cite

This study aimed to evaluate behavioral aspects of Santa Inês sheep in pasture in humid tropical climate. In order to do so, nine Santa Inês sheep were kept on pasture, exposed to the climate directly, without shade, for 24 days, with 12 alternate days in each period (dry and raining) in 2015. The behavioral parameters evaluated were: food consumption, standing idleness, lying idle and rumination. Observations occurred from 08:00 A.M. to 05:55 P.M. The experimental was a completely randomized design (CRD) with two treatments (rainy season and dry period), nine replications, one animal per experimental unit. To understand the correlations of the behavioral parameters with the climatic variables, Pearson's correlation was performed. Approximate average values between the rainy and dry periods for the behavioral variables were observed, but there was a greater intake in the volume of water in the dry period (9.59L/sheep). Also, there were significant differences in the behavior of the animals throughout the day. In the hottest time of the day, at 02:00 P.M., there was standing idle of 25.83min., lying idle of 1.21min., and spent less time-consuming food (27.08min.) in relation to other schedules. We concluded that the sheep had similar behavioral parameters in the rainy and dry periods, but when we observe the times of the days, the behaviors are different. The main activity recorded was grazing, and the variables, temperature and relative humidity of the air influence differently between the seasons, being more marked in the dry period.RESUMO: Este estudo objetivou avaliar aspectos comportamentais de ovinos Santa Inês criados em pasto em clima tropical úmido. Para tanto, foram utilizados nove carneiros Santa Inês, mantidos a pasto, expostos diretamente ao clima, sem sombra, durante 24 dias, sendo 12 dias alternados em cada período (seco e chuvoso) em 2015. Os parâmetros comportamentais avaliados foram consumo de alimento, ócio em pé, ócio deitado e ruminação. As observações ocorreram das 08:00h às 17h:55min. O delineamento experimental foi o inteiramente casualizado (DIC) com dois tratamentos (período chuvoso e período seco), nove repetições, um animal por unidade experimental. Para entender as correlações dos parâmetros comportamentais com as variáveis climáticas foi realizada a correlação de Pearson. Foram observados valores médios gerais aproximados entre os períodos chuvoso e seco para as variáveis comportamentais, porém, houve maior ingestão no volume de água no período seco (9,59L/ovino). Também, ocorreu diferença no comportamento dos animais ao longo do dia. No horário mais quente do dia, das 14h às 15h, registrou-se ócio em pé de 25,83min. e ócio deitado de 1,21min., e os animais passaram menor tempo consumindo alimento (27,08min.) em relação aos demais horários. Podemos concluir que os ovinos apresentaram parâmetros comportamentais semelhantes nos períodos chuvoso e seco, porém, quando observamos os horários dos dias, os comportamentos são diferentes. A principal atividade registrada foi o pastejo. As var...

show abstract

“…Furtado et al (2017), in experiments in the Brazilian semiarid region, cite that air temperature remained high in both the internal and external environments of the facilities, causing discomfort and changes in the physiological variables of the animals. Oliveira et al (2013) also cite high temperatures in this region, highlighting the use of shading to mitigate the effect on the animals. In most of the times, the relative air humidity (RH) was ideal for sheep ( Figure 1A).…”

Section: Resultsmentioning

confidence: 95%

“…Therefore, an alert situation was observed at 8:00 and 18:00 h and a danger situation was observed between 10:00 and 16:00 h ( Figure 1B). Oliveira et al (2013), in a study in the Brazilian semiarid region with sheep exposed to a shaded environment and exposed to the sun, observed high values of BGHI (85.91 and 96.07 in the shaded environment and exposed to the sun, respectively), which led to situations of thermal discomfort for the animals.…”

Section: Resultsmentioning

confidence: 95%

“…Like other animals, sheep suffer under the influence of the environment and, when kept in an environment with elevations in air temperature, may increase their rectal temperature, surface temperature, respiratory rate and heart rate (OLIVEIRA et al, 2013;LUZ et al, 2014;COSTA et al, 2015;NOBRE et al, 2016;TORRES et al, 2017;SEIXAS et al, 2017). When the physiological mechanisms of the animals fail to eliminate excess body heat, their rectal temperature may increase (MARAI et al, 2007;FURTADO et al, 2017), reflecting the elevation in their internal body temperature, resulting in increased respiratory rate and sweating.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of water salinity on the adaptability of confined sheep in the Brazilian semiarid region

Júnior

Furtado

Neto

et al. 2019

AVB

View full text Add to dashboard Cite

Article history The present study aimed to evaluate the thermal comfort indices inside the facilities and the influence of water salinity on the physiological responses of sheep in confinement receiving water with four levels of salinity (1.5, 3.0, 6.0 and 9.0 dS m-1), consuming feed and water at will. The experimental configuration adopted was a completely randomized design (CRD), composed of 4 treatments and 6 replicates, with data submitted to analysis of variance (ANOVA) and means compared by Tukey test at 5% probability level. Air temperature, black globe temperature and humidity index and the thermal load of radiation at the hottest times of the day were above the thermal comfort zone for sheep, with low relative air humidity, factors that did not affect the rectal temperature, but caused elevation in surface temperature, respiratory rate and heart rate. Supplying water with salinity of up to 9.0 dS m-1 did not affect (P>0.05) the physiological responses of sheep.

show abstract

Parâmetros fisiológicos de ovinos Santa Inês submetidos a sombreamento com tela de polipropileno

Cited by 10 publications

References 13 publications

Physiological Responses of Dairy Cows as a Function of Environment in Holding Pen

Physiological Responses of Dairy Cows as a Function of Environment in Holding Pen

Behavioral aspects of Santa Inês sheep kept in pasture in a tropical rainforest climate

Influence of water salinity on the adaptability of confined sheep in the Brazilian semiarid region

Contact Info

Product

Resources

About