Laser and thermographic infrared temperatures associated with heat tolerance in adult rams

Junior, Costa; Lucci, Carolina Madeira; Peripolli, Vanessa; Tanure, Candice Bergmann; Ribeiro, Laiane Medeiros; Barbosa, Thiago Muratori; Ramos, A. F.; Louvandini, Hélder; McManus, Concepta

doi:10.1016/j.smallrumres.2015.10.011

Cited by 12 publications

(5 citation statements)

References 20 publications

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“…However, the assessment of adaptability can be complemented with variables such as heart rate and surface temperature [5]. It has also been observed that thermographic evaluation surveys in sheep can adequately assess temperature gradients and identify breeds that have better heat tolerance [10]. Given to a high correlation between environmental indices and sheep surface temperature, the importance of establishing indicative values of thermal discomfort to adopt measures to mitigate thermal stress and not compromise the productive performance has been stated [23].…”

Section: Table II Differences In Meteorological Parameters Between Morning and Afternoon In Both Groupsmentioning

confidence: 99%

Physiological response to thermal stress in hair-sheep ewes during subtropical summer

et al. 2021

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With the aim to assess the effect of short-term thermal stress on physiological traits of ewes an experiment was designed. Fourteen hair sheep ewes were selected during early reproductive management and randomly segregated in two groups. Control group (CG) with indoor conditions, and an experimental group (EG) under continuous outdoor conditions without shadow accessing during 14 days (d). Respiratory frequency (RF), rectal temperature (RT) and infrared image temperatures were estimated. Traits were measured for 8 d twice a d (9:00 am and 15:00 pm). Environmental temperature and humidity were monitored, and temperature and humidity index was estimated. All physiological and environmental traits showed significantly variation by group and time of measurement (P < 0.001). RT and RF were significantly higher for EG and during pm measurements. Environmental conditions indicated thermal stress conditions for outdoor EG during the afternoon was related ultimately with respiratory mechanism as the main indicator of continuous thermal stress. Head infrared image temperature was a good predictor of body temperature.

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Section: Table II Differences In Meteorological Parameters Between Morning and Afternoon In Both Groupsmentioning

confidence: 99%

Physiological response to thermal stress in hair-sheep ewes during subtropical summer

et al. 2021

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“…According to Cruz Júnior et al (2015), this technique can be employed to adequately assess temperature gradients in sheep and identify breeds or crossbreeding strategies that are more or less heat tolerant.…”

Section: Resultsmentioning

confidence: 99%

Simple physiological indicators of 1„2 Santa inês Ã— 1„2 Dorper crossbred sheep raised in the municipality of Mirador, Maranhão, Brazil

Moura¹,

Borges²,

Moreira³

et al. 2022

Bol. Ind. Anim.

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In this study we aimed to evaluate the influence of environmental differences caused by day shifts on the physiological indicators of crossbred ½ Santa Inês Ã— ½ Dorper sheep raised in a semi-intensive system. For this, 12 animals with an average weight of 35.00 ± 5.00 kg were allocated in a completely randomized design, with two treatments (morning shift and afternoon shift) and six replicates per treatment. The environmental variables (temperature (ºC) and relative humidity (%)) were collected using a digital thermo-hygrometer. The black globe temperature and humidity index was calculated using temperature values of the black globe thermometer and dew point. The following physiological indicators were measured in the animals: respiratory rate (mov/min); heart rate (beats/min); rectal temperature (ºC); and surface temperature (ºC). In the morning shift, the average values of air temperature and relative humidity were 31.71ºC and 88.66%, respectively. In the afternoon, the average air temperature was 33.91ºC, while the relative humidity was 62.66%. The highest mean globe temperature and humidity index was observed in the afternoon shift (87.75). The physiological indicators showed the highest mean values in the afternoon shift: respiratory rate 73.72 mov/min; heart rate 81.27 beats/min; rectal temperature 39.98ºC; surface temperature 34.76ºC. The crossbred 1„2 Santa Inês Ã— 1„2 Dorper sheep reared in a semi-intensive system showed signs of thermal discomfort.

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“…Researchers have shown that several factors can affect the reliability of IRT, such as camera configuration (Knížková et al, 2007); camera cleaning (Glavas et al, 2018); feeding period (Montanholi et al, 2008); Day period (Castro-Costa et al, 2014); Pelage and plumage (Malcolm, 2013;Pulido-Rodrígues et al, 2021); body color (Ludwing et al, 2013;Chacur et al, 2014); solar radiation on the study surface (Ludwing et al, 2013;Chacur et al, 2014); season (Chacur et al, 2016;Ahirwar et al, 2017); breed (Cruz Júnior et al, 2015); milking period (Yang et al, 2018); air temperature and humidity (Chacur et al, 2016;Schaefer et al, 2018); animal stress ( Pulido-Rodrígues et al, 2021) and reproductive stage (Deak et al, 2019). According to Polat et al (2010), the identification and control of these factors is necessary when using IRT.…”

Section: Limitations Of the Irt In Livestock Animalsmentioning

confidence: 99%

Infrared thermography on animal livestock

Melo¹,

Silva²,

Santos

et al. 2022

CONJ

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Infrared thermography has become increasingly promising in veterinary medicine, for being a non-invasive method for detecting body thermal variation. The objective of this review was to elucidate some applications of infrared thermography and its importance on animal livestock. This tool can substitute conventional techniques for diagnosing diseases, inflammation and fever. The body temperature is an important indicator to diagnostics and to understanding physiological aspects due to the close relation between abnormal temperatures and inflammatory processes. Also, it can help monitor reproductive performance and identify more efficient animals, among other purposes. The measurement of infrared temperature allows identifying sick animals, before the appearance of clinical symptoms, making treatment and isolation faster and more accurate, enhancing the profitability and sustainability of the system. However, this tool has some limitations, such as the animal species and environmental factors. Thus, further studies are needed for the application of the thermographic on animal livestock.

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Laser and thermographic infrared temperatures associated with heat tolerance in adult rams

Cited by 12 publications

References 20 publications

Physiological response to thermal stress in hair-sheep ewes during subtropical summer

Physiological response to thermal stress in hair-sheep ewes during subtropical summer

Simple physiological indicators of 1„2 Santa inês Ã— 1„2 Dorper crossbred sheep raised in the municipality of Mirador, Maranhão, Brazil

Infrared thermography on animal livestock

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Laser and thermographic infrared temperatures associated with heat tolerance in adult rams

Cited by 12 publications

References 20 publications

Physiological response to thermal stress in hair-sheep ewes during subtropical summer

Physiological response to thermal stress in hair-sheep ewes during subtropical summer

Simple physiological indicators of 1„2 Santa inês Ã— 1„2 Dorper crossbred sheep raised in the municipality of Mirador, Maranhão, Brazil

Infrared thermography on animal livestock

Contact Info

Product

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Simple physiological indicators of 1„2 Santa inês Ã— 1„2 Dorper crossbred sheep raised in the municipality of Mirador, Maranhão, Brazil