Estimating sensible heat loss in laying hens through thermal imaging

Souza, João Batista Freire de; El-Sabrout, Karim; Arruda, Alex Martins Varela de; Costa, Leonardo Lélis de Macedo

doi:10.1016/j.compag.2019.105038

Cited by 21 publications

(11 citation statements)

References 26 publications

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“…Heat stress is one of the most prevalent environmental stressors affecting growth and impeding efficient poultry production (Souza‐Junior et al., 2019 ). It is an imbalance between the amount of heat production and heat loss in the bird's body (Zhang et al., 2012 ; Saracila et al., 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Effects of dietary stinging nettle (Urtica dioica) on hormone stress and selected serum biochemical parameters of broilers subjected to chronic heat stress

Farahani

Hosseinian

2022

Veterinary Medicine & Sci

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Background: Heat stress is one of the most critical problems confronting the poultry industry. Stinging nettle (SN) is a medicinal plant with potent antioxidant properties. Objective:The goal of this study was to evaluate the effects of dietary SN at two different levels (2 and 4%) on the serum levels of cortisol and some selected parameters of broilers exposed to chronic heat stress.Methods: A total of 240 broiler chickens were randomly assigned to six dietary groups as follows: (1) control: fed the basal diet; (2) HS: heat-stressed broiler fed the basal diet; (3) HS-SN2: heat-stressed broiler fed 2% dietary SN; (4) HS-SN4: heat-stressed broilers fed 4% SN; (5) SN2: no heat-stressed broilers fed the basal diet supplemented with 2% SN; (6) SN4: no heat-stressed broilers fed the basal diet supplemented with 4% SN. Diet supplementation with SN was performed from days 14 to 35 and chronic heat stress was induced from days 22 to 29. The serum parameters were evaluated on days 14, 21, 29 and 35.Results: HS had higher serum levels of cortisol, total cholesterol (TC), aspartate aminotransferase, alanine aminotransferase and creatine kinase (CK) compared to the other treatments. HS-SN4 had significantly lower cortisol, TC, alanine aminotransferase and CK compared to HS and HS-SN2. Conclusions:The inclusion of 4% SN powder in the broilers' diet alleviated the negative effects of heat stress by decreasing cortisol, TC and tissue damage indices. It seems that dietary SN could be used as a feed additive in the poultry diet for improving the health status and defence mechanisms of the birds under stressful conditions.

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Section: Introductionmentioning

confidence: 99%

Effects of dietary stinging nettle (Urtica dioica) on hormone stress and selected serum biochemical parameters of broilers subjected to chronic heat stress

Farahani

Hosseinian

2022

Veterinary Medicine & Sci

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“…From this, it can be observed that the majority of independently measured values for emissivity are for human ( n = 12) ( 124 , 136 – 146 ) rather than livestock tissues with the exception of two measurements in pigs ( 123 , 127 ). A number of sources ( n = 13, including manufacturer user's manuals) 6 , 7 offer no independently measured or referenced source for the used emissivity value stated ( 13 , 32 , 62 , 118 , 122 , 125 , 126 , 129 , 147 , 148 ) and a number of sources ( n = 12) did not independently measure emissivity but referenced another source for the value they used ( 14 , 50 , 54 , 66 , 117 , 120 , 121 , 131 , 133 , 134 , 149 , 150 ).…”

Section: Resultsmentioning

confidence: 99%

Thermography for disease detection in livestock: A scoping review

et al. 2022

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Infra-red thermography (IRT) offers potential opportunities as a tool for disease detection in livestock. Despite considerable research in this area, there are no common standards or protocols for managing IRT parameters in animal disease detection research. In this review, we investigate parameters that are essential to the progression of this tool and make recommendations for their use based on the literature found and the veterinary thermography guidelines from the American Academy of Thermology. We analyzed a defined set of 109 articles concerned with the use of IRT in livestock related to disease and from these articles, parameters for accurate IRT were identified and sorted into the fields of camera-, animal- or environment-related categories to assess the practices of each article in reporting parameters. This review demonstrates the inconsistencies in practice across peer-reviewed articles and reveals that some important parameters are completely unreported while others are incorrectly captured and/or under-represented in the literature. Further to this, our review highlights the lack of measured emissivity values for live animals in multiple species. We present guidelines for the standards of parameters that should be used and reported in future experiments and discuss potential opportunities and challenges associated with using IRT for disease detection in livestock.

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“…In this scenario, the infrared thermography can provide important information on the ambience of the load. The thermal imaging obtained give the possibility of target surface temperature mapping (Souza-Junior et al 2019;Rocha et al 2019;Lima et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Effect of wetting method on the broiler transport in Brazilian Northeast

Pinheiro

Filho

Machado

2020

JABB

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The aim of this study was to evaluate the efficiency of the load wetting method to attenuate the ambience of the load the transport of broilers. Fourteen commercial consignments were monitored over a 25 km route, and in seven of these, the load wetting was carried (LW) out while in the other seven no wetting was done (LD). The temperatures of the side, top and rear load boxes were analyzed by infrared thermography. The central row load boxes were evaluated by geostatistics, using temperature variability (TA), relative humidity (RH) and the enthalpy comfort index (ECI). The mean was compared by Student's t-test (P < 0.05). The results showed that load wetting has a momentary effect (P < 0.05). The boxes located in the central rows in the LW showed a higher (P < 0.05) ECI compared to those in the LD. In addition, areas classified as lethal were formed in the LW. In conclusion, load wetting was not an efficient method to attenuate the ambience of load during the commercial transport of broilers, as it only has momentary and transient effects.

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Estimating sensible heat loss in laying hens through thermal imaging

Cited by 21 publications

References 26 publications

Effects of dietary stinging nettle (Urtica dioica) on hormone stress and selected serum biochemical parameters of broilers subjected to chronic heat stress

Effects of dietary stinging nettle (Urtica dioica) on hormone stress and selected serum biochemical parameters of broilers subjected to chronic heat stress

Thermography for disease detection in livestock: A scoping review

Effect of wetting method on the broiler transport in Brazilian Northeast

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