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da Silva WC, da Silva JAR, Martorano LG, da Silva ÉBR, Belo TS, Neves KAL, Camargo Júnior RNC, de Araújo CV, Vilela LGP, Joaquim LA, de Carvalho Rodrigues TCG, Lourenço-Júnior JDB. Characterization of the Temperament and Reactivity of Nelore Cattle ( Bos indicus) Associated with Behavior Scores during Corral Management in the Humid Tropics. Animals (Basel) 2024; 14:1769. [PMID: 38929388 PMCID: PMC11200586 DOI: 10.3390/ani14121769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2024] [Revised: 06/04/2024] [Accepted: 06/05/2024] [Indexed: 06/28/2024] Open
Abstract
The evaluation of the reactivity and distress of cattle during corral management, by means of subjective scores, aims at the standardization of behavioral indicators, through non-invasive methods, in addition to enabling the development of more appropriate management practices, thus promoting the comfort and well-being of these animals. Therefore, in this study, we aimed to characterize the temperament and distress of cattle managed in a corral using behavioral indicators during the rainiest period. For this, the experiment was conducted on a property located in the municipality of Mojuí dos Campos, during the rainiest quarter (February-April). Thus, 30 male cattle, not castrated, approximately 29 months of age, clinically healthy, and weighing 310 + 20 kg, were divided into three rearing systems: silvopastoral (SP), traditional (SS), and integrated (SI) systems. There were 10 animals per system. Physiological parameters were collected to evaluate rectal temperature (RT) and respiratory rate (RR), as well as body surface temperature (BST), through thermal windows (head and flank infrared temperature and rump infrared temperature). To evaluate temperament and reactivity, scores indicative of corral behavior were used, namely escape speed (ES), tension score (SS_1), tension score (SS_2), reactivity scale (RS), movement score (MS), and temperament scale (TS). The results showed that there was a thermal amplitude of 5.9 °C on average and 8.6 °C at maximum when comparing the structure of the corral and the trees. In addition, the comparisons between the production systems for the behavioral variables did not differ at the 5% significance level, except for ES, where the traditional system differed from the integrated system and the silvopastoral system, showing intermediate average values for both. In addition, there was a positive correlation between the variables RT and RR (r = 0.72; p < 0.01), RR and SS_2 (r = 0.38; p = 0.04), flank infrared temperature and MS (r = 0.47; p = 0.01), rump infrared temperature and RS (r = 0.37; p = 0.04), SS_1 and RS (r = 0.41; p = 0.02), SS_1 and SS_2 (r = 0.39; p = 0.03), RS and SS_2 (r = 0.58; p = 0.00), RS and MS (r = 0.50; p = 0.01), RS and TS (r = 0.61; p = 0.00), SS_2 and MS (r = 0.51; p = 0.00), SS_2 and TS (r = 0.47; p = 0.01), and MS and TS (r = 0.44; p = 0.02), and a negative correlation between ES and TS (r = -0.42; p = 0.02). The rainy season had a major influence on the evaluation of temperature and distress levels during handling in the corral, as evidenced by the association between physiological and behavioral parameters.
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Affiliation(s)
- Welligton Conceição da Silva
- Postgraduate Program in Animal Science (PPGCAN), Institute of Veterinary Medicine, Federal University of Para (UFPA), Castanhal 68746-360, Brazil; (É.B.R.d.S.); (R.N.C.C.J.); (L.A.J.); (T.C.G.d.C.R.); (J.d.B.L.-J.)
| | | | | | - Éder Bruno Rebelo da Silva
- Postgraduate Program in Animal Science (PPGCAN), Institute of Veterinary Medicine, Federal University of Para (UFPA), Castanhal 68746-360, Brazil; (É.B.R.d.S.); (R.N.C.C.J.); (L.A.J.); (T.C.G.d.C.R.); (J.d.B.L.-J.)
| | - Tatiane Silva Belo
- Department of Veterinary Medicine, University Center of the Amazon (UNAMA), Santarem 68010-200, Brazil;
| | - Kedson Alessandri Lobo Neves
- Institute of Engineering and Geosciences, Federal University of Western Pará (UFOPA), Santarem 68040-255, Brazil;
| | - Raimundo Nonato Colares Camargo Júnior
- Postgraduate Program in Animal Science (PPGCAN), Institute of Veterinary Medicine, Federal University of Para (UFPA), Castanhal 68746-360, Brazil; (É.B.R.d.S.); (R.N.C.C.J.); (L.A.J.); (T.C.G.d.C.R.); (J.d.B.L.-J.)
| | - Cláudio Vieira de Araújo
- Institute of Animal Science, Federal University of Western Pará (UFOPA), Santarem 68040-255, Brazil;
| | | | - Leonel António Joaquim
- Postgraduate Program in Animal Science (PPGCAN), Institute of Veterinary Medicine, Federal University of Para (UFPA), Castanhal 68746-360, Brazil; (É.B.R.d.S.); (R.N.C.C.J.); (L.A.J.); (T.C.G.d.C.R.); (J.d.B.L.-J.)
| | - Thomaz Cyro Guimarães de Carvalho Rodrigues
- Postgraduate Program in Animal Science (PPGCAN), Institute of Veterinary Medicine, Federal University of Para (UFPA), Castanhal 68746-360, Brazil; (É.B.R.d.S.); (R.N.C.C.J.); (L.A.J.); (T.C.G.d.C.R.); (J.d.B.L.-J.)
| | - José de Brito Lourenço-Júnior
- Postgraduate Program in Animal Science (PPGCAN), Institute of Veterinary Medicine, Federal University of Para (UFPA), Castanhal 68746-360, Brazil; (É.B.R.d.S.); (R.N.C.C.J.); (L.A.J.); (T.C.G.d.C.R.); (J.d.B.L.-J.)
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Abduch NG, Reolon HG, Ligori VA, Silva RMDO, Veríssimo CJ, Paz CCP, Stafuzza NB. Resistance to natural tick infestation varies with age and coat and hair traits in a tropically adapted beef cattle breed. Vet Parasitol Reg Stud Reports 2024; 50:101017. [PMID: 38644040 DOI: 10.1016/j.vprsr.2024.101017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 03/28/2024] [Accepted: 03/29/2024] [Indexed: 04/23/2024]
Abstract
Rhipicephalus (Boophilus) microplus causes considerable livestock production losses. Knowledge of the traits that influence tick resistance contributes to the development of breeding strategies designed to improve herd productivity. Within this context, this study evaluated the resistance of Caracu, a tropically adapted cattle breed, to R. microplus. Tick count, hair length, coat thickness, and coat color were evaluated in 202 naturally tick-infested females (cows and heifers) over a period of 18 months. Blood samples were collected from all animals during the winter season for hematological analysis. Data were analyzed using Pearson correlations, generalized linear models, and principal component analysis. Correlation coefficients of tick count with coat color, coat thickness, and hair length were estimated within each season. Hematological parameters were only included in the winter season analysis and were analyzed by the restricted maximum likelihood method using log-transformed data. No differences in blood parameters were observed between animals with and without ticks. However, tick count was negatively correlated with erythrocytes (-0.29) and hematocrit (-0.24) and positively correlated with mean corpuscular hemoglobin (0.21) and mean corpuscular hemoglobin concentration (0.25). These findings suggest that higher tick counts lead to a decrease in erythrocytes but also to an increase in the amount of hemoglobin per erythrocyte, which could reduce the damage caused by low erythrocyte levels due to tick hematophagy, delaying or preventing anemia. Although tick infestation on pasture was demonstrated by the infestation of all staff members during herd management, none of the animals exhibited high tick counts, providing evidence of resistance of Caracu animals to R. microplus. Tick infestation was influenced by age class (cows > heifers), season (spring and summer > fall and winter), coat thickness (>1.5 mm > <1.5 mm), and hair length (>6 mm > <6 mm). Three components were extracted by principal component analysis, which accounted for 69.46% of data variance. The findings of this study will contribute to the development of efficient strategies aimed at reducing economic losses due to tick infestation and could be applied in animal breeding to select for tick resistance traits, reducing chemical control strategies and consequently improving sustainable livestock production.
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Affiliation(s)
- Natalya Gardezani Abduch
- Department of Genetics, Ribeirao Preto Medical School (FMRP), University of Sao Paulo (USP), Ribeirao Preto, SP 140349-900, Brazil.
| | | | - Viviane Andrade Ligori
- Beef Cattle Research Center, Animal Science Institute (IZ), Sertaozinho, SP 14160-900, Brazil.
| | | | - Cecília José Veríssimo
- Sao Paulo Agency of Agribusiness and Technology, Animal Science Institute (IZ), Nova Odessa, SP 13380-011, Brazil.
| | - Claudia Cristina Paro Paz
- Department of Genetics, Ribeirao Preto Medical School (FMRP), University of Sao Paulo (USP), Ribeirao Preto, SP 140349-900, Brazil; Sustainable Livestock Research Center, Animal Science Institute, Sao Jose do Rio Preto, SP 15130-000, Brazil
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Azevedo LA, Canozzi MEA, Rodhermel JCB, Schwegler E, La Manna A, Clariget J, Bianchi I, Moreira F, Olsson DC, Peripolli V. Strategies to alleviate heat stress on performance and physiological parameters in feedlot-finished cattle under heat stress conditions. A systematic review-meta-analysis. J Therm Biol 2024; 119:103798. [PMID: 38310809 DOI: 10.1016/j.jtherbio.2024.103798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 12/23/2023] [Accepted: 01/16/2024] [Indexed: 02/06/2024]
Abstract
Strategies to alleviate heat stress on live performance - dry matter intake (DMI), average daily gain (ADG), and feed conversion efficiency (FCE) - and on physiological parameters - respiratory rate (RR) and panting score (PS) - of feedlot-finished cattle were evaluated by systematic review-meta-analysis. Using the PICO framework were identified 3813 records, with 31 publications and 6729 cattle being considered in the meta-analysis (MA). The comparison most reported was sun vs. shade (n = 24 publications), followed by shade vs. shade (area per animal and effectivity in reduce solar load) (n = 7 publications) and sun vs. sprinkling (n = 4 publications). Cattle with access to shade with total reduction in solar load improved ADG (p = 0.008) and FCE (p = 0.024), and reduced RR (p < 0.001) compared to unshaded animals. Cattle with access to shade with a height between 3 and 4 m increased ADG (p < 0.001), tended to improve FCE (p = 0.054), and reduced RR (p < 0.001) compared to unshaded animals. An area of shade from 2 to 4 m2/animal increased ADG (p = 0.002), and higher than 4 m2/animal reduced RR (p < 0.001) compared to unshaded animals. Animals that received sprinkling volume below 1 L/animal/min improved ADG (p = 0.008) compared to unshaded animals. Cattle with access to shade with a high area per animal improved DMI (p = 0.023) and ADG (p < 0.001) compared to animals with a low area. In univariate meta-regression, it was observed that the variables significantly (P < 0.05) influencing DMI were THI category; influencing ADG were cattle gender, THI category, and coat color; influencing FCE were cattle age and hemisphere; and influencing RR were country, THI category and climate. Performance and physiological parameters of feedlot-finished cattle under heat stress depend on animal and environmental characteristics.
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Affiliation(s)
- Luciano Araujo Azevedo
- Curso de Pós-Graduação em Produção e Sanidade Animal (PGPSA), Instituto Federal Catarinense, Campus Araquari, Araquari, SC, 89245-000, Brazil
| | | | | | - Elizabeth Schwegler
- Curso de Pós-Graduação em Produção e Sanidade Animal (PGPSA), Instituto Federal Catarinense, Campus Araquari, Araquari, SC, 89245-000, Brazil
| | - Alejandro La Manna
- Instituto Nacional de Investigación Agropecuaria (INIA), INIA La Estanzuela, Colonia, 70000, Uruguay
| | - Juan Clariget
- Instituto Nacional de Investigación Agropecuaria (INIA), INIA La Estanzuela, Colonia, 70000, Uruguay
| | - Ivan Bianchi
- Curso de Pós-Graduação em Produção e Sanidade Animal (PGPSA), Instituto Federal Catarinense, Campus Araquari, Araquari, SC, 89245-000, Brazil
| | - Fabiana Moreira
- Curso de Pós-Graduação em Produção e Sanidade Animal (PGPSA), Instituto Federal Catarinense, Campus Araquari, Araquari, SC, 89245-000, Brazil
| | - Débora Cristina Olsson
- Curso de Pós-Graduação em Produção e Sanidade Animal (PGPSA), Instituto Federal Catarinense, Campus Concórdia, Concórdia, SC, 89703-720, Brazil
| | - Vanessa Peripolli
- Curso de Pós-Graduação em Produção e Sanidade Animal (PGPSA), Instituto Federal Catarinense, Campus Araquari, Araquari, SC, 89245-000, Brazil.
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da Silva WC, da Silva JAR, da Silva ÉBR, Barbosa AVC, Sousa CEL, de Carvalho KC, dos Santos MRP, Neves KAL, Martorano LG, Camargo Júnior RNC, Lourenço-Júnior JDB. Characterization of Thermal Patterns Using Infrared Thermography and Thermolytic Responses of Cattle Reared in Three Different Systems during the Transition Period in the Eastern Amazon, Brazil. Animals (Basel) 2023; 13:2735. [PMID: 37685000 PMCID: PMC10487038 DOI: 10.3390/ani13172735] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Revised: 08/25/2023] [Accepted: 08/26/2023] [Indexed: 09/10/2023] Open
Abstract
In the Lower Amazon mesoregion, there are basically three types of production systems: the traditional (without shade and no bathing area), the silvopastoral (with shade and no bathing area), and the integrated (with shade and bathing area). It is considered that the type of production system influences the thermal comfort and productivity of cattle, so this research aims to evaluate the influence of these three types of production systems on the thermoregulation of Nellore cattle. The experiment was carried out on a rural property for raising cattle, located in Mojuí dos Campos, Pará, Brazil, during the transition period (June/July). Thirty bovine males (not castrated, aged between 18 and 20 months, average weight of 250 ± 36 kg, body condition score of 3.5, clinically healthy) were randomly divided into three groups: Silvopastoral System-SS (n = 10), Traditional System-TS (n = 10), and Integrated System-IS (n = 10). Climate variables were collected (air temperature (AT °C), relative humidity (RH %), wind speed (WS, m/s), solar radiation (SR), black globe temperature (BGT °C), and physiological parameters, such as respiratory rate (RR) and rectal temperature (RT)) at 6 a.m., 12 p.m., 6 p.m., and 12 a.m. to determine the thermal comfort situation of the animals. Thermographic images of the environment and animals were captured in order to obtain the body surface temperature (BST) through infrared thermography. The Benezra Thermal Comfort Index (BTCI), Environmental Stress Index (ESI), Equivalent Temperature Index (ETI), and Iberian Heat Tolerance Index (Iberian HTI) were used. The results showed that the silvopastoral system, with shading by chestnut trees and an ample vegetative area, presented better thermal conditions, with an average of 28.98 °C, in comparison with the traditional system (35.93 °C) and the integrated one (34.11 °C). It was observed that the body surface temperature of cattle did not differ significantly between the anatomical regions of the body and the studied systems (p > 0.05). As for the respiratory rate, the traditional system registered higher values, with an average of 41 movements per minute, indicating possible thermal stress (p < 0.05). The thermal comfort indices revealed that all systems presented moderate stress conditions during times of higher solar intensity. It is concluded that the silvopastoral system proved to be more favorable for cattle, providing shade and reducing thermal stress, which may have a positive impact on animal welfare and productivity in this region.
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Affiliation(s)
- Welligton Conceição da Silva
- Postgraduate Program in Animal Science (PPGCAN), Institute of Veterinary Medicine, Federal University of Para (UFPA), Federal Rural University of the Amazônia (UFRA), Brazilian Agricultural Research Corporation (EMBRAPA), Castanhal 68746-360, Brazil; (É.B.R.d.S.); (R.N.C.C.J.); (J.d.B.L.-J.)
| | | | - Éder Bruno Rebelo da Silva
- Postgraduate Program in Animal Science (PPGCAN), Institute of Veterinary Medicine, Federal University of Para (UFPA), Federal Rural University of the Amazônia (UFRA), Brazilian Agricultural Research Corporation (EMBRAPA), Castanhal 68746-360, Brazil; (É.B.R.d.S.); (R.N.C.C.J.); (J.d.B.L.-J.)
| | | | - Carlos Eduardo Lima Sousa
- Department of Veterinary Medicine, University Center of the Amazon (UNAMA), Santarem 68010-200, Brazil; (C.E.L.S.); (K.C.d.C.)
| | - Katarina Cardoso de Carvalho
- Department of Veterinary Medicine, University Center of the Amazon (UNAMA), Santarem 68010-200, Brazil; (C.E.L.S.); (K.C.d.C.)
| | | | | | | | - Raimundo Nonato Colares Camargo Júnior
- Postgraduate Program in Animal Science (PPGCAN), Institute of Veterinary Medicine, Federal University of Para (UFPA), Federal Rural University of the Amazônia (UFRA), Brazilian Agricultural Research Corporation (EMBRAPA), Castanhal 68746-360, Brazil; (É.B.R.d.S.); (R.N.C.C.J.); (J.d.B.L.-J.)
| | - José de Brito Lourenço-Júnior
- Postgraduate Program in Animal Science (PPGCAN), Institute of Veterinary Medicine, Federal University of Para (UFPA), Federal Rural University of the Amazônia (UFRA), Brazilian Agricultural Research Corporation (EMBRAPA), Castanhal 68746-360, Brazil; (É.B.R.d.S.); (R.N.C.C.J.); (J.d.B.L.-J.)
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Abduch NG, Pires BV, Souza LL, Vicentini RR, Zadra LEF, Fragomeni BO, Silva RMO, Baldi F, Paz CCP, Stafuzza NB. Effect of Thermal Stress on Thermoregulation, Hematological and Hormonal Characteristics of Caracu Beef Cattle. Animals (Basel) 2022; 12:ani12243473. [PMID: 36552393 PMCID: PMC9774310 DOI: 10.3390/ani12243473] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 12/02/2022] [Accepted: 12/06/2022] [Indexed: 12/13/2022] Open
Abstract
This study evaluated the influence of environmental temperature on thermoregulation, hormonal, and hematological characteristics in Caracu cattle. Blood samples, hair length, coat and muzzle colors, rectal (RT), and surface temperatures were collected from 48 males and 43 females before (morning) and after sun exposure for eight hours (afternoon). Infrared thermography (IRT) was used to identify superficial temperature that exhibits a high correlation with RT. Hematological parameters, hormone concentrations, RT, and the superficial temperature obtained by IRT that exhibited the highest correlation with RT were evaluated by variance analysis. Regarding IRT, the lower left side of the body (LS) showed the highest correlation with the RT. Interaction between period and sex was observed for LS, cortisol, and eosinophils. Cortisone, progesterone, and RT were influenced by period and sex. Neutrophils and segmented neutrophils were influenced by the period, which showed the highest concentrations after sun exposure. Platelets, leukocytes, lymphocytes, and monocytes were influenced by sex. Heat stress changes several physiological characteristics where males and females exhibited differences in their responses to heat stress. Furthermore, most characteristics evaluated remained within the regular values observed for taurine Creole breeds, showing that Caracu is adapted to tropical climates.
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Affiliation(s)
- Natalya G Abduch
- Centro Avançado de Pesquisa e Desenvolvimento em Bovinos de Corte, Instituto de Zootecnia (IZ), Sertãozinho 14174-000, SP, Brazil
| | - Bianca V Pires
- Departamento de Genética, Faculdade de Medicina de Ribeirão Preto (FMRP), Universidade de São Paulo (USP), Ribeirão Preto 14049-900, SP, Brazil
| | - Luana L Souza
- Departamento de Zootecnia, Faculdade de Ciências Agrárias e Veterinárias (FCAV), Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP), Jaboticabal 14884-900, SP, Brazil
| | - Rogerio R Vicentini
- Departamento de Zoologia, Universidade Federal de Juiz de Fora (UFJF), Juiz de Fora 36036-900, MG, Brazil
| | - Lenira El Faro Zadra
- Centro Avançado de Pesquisa e Desenvolvimento em Bovinos de Corte, Instituto de Zootecnia (IZ), Sertãozinho 14174-000, SP, Brazil
| | - Breno O Fragomeni
- Department of Animal Science, University of Connecticut, Storrs, CT 06269, USA
| | | | - Fernando Baldi
- Departamento de Zootecnia, Faculdade de Ciências Agrárias e Veterinárias (FCAV), Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP), Jaboticabal 14884-900, SP, Brazil
| | - Claudia C P Paz
- Centro Avançado de Pesquisa e Desenvolvimento em Bovinos de Corte, Instituto de Zootecnia (IZ), Sertãozinho 14174-000, SP, Brazil
| | - Nedenia B Stafuzza
- Centro Avançado de Pesquisa e Desenvolvimento em Bovinos de Corte, Instituto de Zootecnia (IZ), Sertãozinho 14174-000, SP, Brazil
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Costa E Silva R, de Moura JFP, de Souza BB, Pereira Filho JM, Bezerra LR, do Nascimento FS, de Oliveira JPF, de Araújo Wanderley JN. Polymorphism of the beta-casein gene and adaptability of Sindhi cows to semiarid conditions. Trop Anim Health Prod 2021; 53:534. [PMID: 34739597 DOI: 10.1007/s11250-021-02948-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Accepted: 09/24/2021] [Indexed: 11/28/2022]
Abstract
This study aimed to investigate the effect of beta-casein genotypes (A1A2 and A2A2) in three different thermal comfort conditions on the adaptability of Sindhi cows and as a tool for selecting thermotolerant cattle. Twelve Sindhi cows were used in a completely randomized design in a 2 × 3 factorial arrangement, with six replicates, with two genotypes, and three thermal comfort conditions. The climatic variables were recorded, while black globe temperature, humidity index, and radiant heat load were calculated. We measured respiratory rate, surface temperature, and rectal temperature while the heat tolerance coefficient was calculated. Genotype had no significant effect (p > 0.05) on any of the parameters measured. However, there was a thermal comfort condition effect (p < 0.05) on rectal temperature, surface temperature, and thermal gradients. The respiratory rate and heat tolerance coefficient were not significantly affected (p > 0.05). Therefore, although the results indicate substantial adaptability of Sindhi cows under any thermal conditions, the tested genotypes should not be used as a tool for selecting thermotolerant Sindhi cows.
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Affiliation(s)
- Rhamon Costa E Silva
- Center of Health and Rural Technology, Federal University of Campina Grande, Jatobá, Patos, Paraíba, 58708110, Brazil
| | - José Fabio Paulino de Moura
- Center of Health and Rural Technology, Federal University of Campina Grande, Jatobá, Patos, Paraíba, 58708110, Brazil
| | - Bonifácio Benicio de Souza
- Center of Health and Rural Technology, Federal University of Campina Grande, Jatobá, Patos, Paraíba, 58708110, Brazil
| | - José Morais Pereira Filho
- Center of Health and Rural Technology, Federal University of Campina Grande, Jatobá, Patos, Paraíba, 58708110, Brazil
| | - Leilson Rocha Bezerra
- Center of Health and Rural Technology, Federal University of Campina Grande, Jatobá, Patos, Paraíba, 58708110, Brazil
| | - Fábio Santos do Nascimento
- Center of Health and Rural Technology, Federal University of Campina Grande, Jatobá, Patos, Paraíba, 58708110, Brazil
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Zakari FO, Ayo JO. Comparison of body temperature in donkeys using rectal digital, infrared, and mercury-in-glass thermometers during the hot-dry season in a tropical savannah. INTERNATIONAL JOURNAL OF BIOMETEOROLOGY 2021; 65:1053-1067. [PMID: 33616760 DOI: 10.1007/s00484-021-02087-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 10/02/2020] [Accepted: 01/26/2021] [Indexed: 06/12/2023]
Abstract
The study aimed at comparing variations in body temperature values recorded using rectal digital, infrared, and mercury-in-glass thermometers in donkeys during the hot-dry season, prevailing under tropical savannah conditions. Thirty donkeys that served as subjects were divided into three groups of adults, yearlings, and foals. Values of the body temperature of each donkey were recorded bihourly, starting from 06:00 h till 18:00 h, by digital (5-cm depth of insertion), mercury-in-glass (3 cm depth), and infrared thermometers. The values obtained by each type of the thermometer were compared with those recorded using a 15-cm digital probe (Model HI935007, Hanna Instruments, range -50.0 to 150.0°C; accuracy ± 0.2°C) which served as the gold standard. Dry-bulb temperature (34.00 ± 0.50°C), temperature-humidity index (79.65 ± 0.15), and wet-bulb globe temperature (28.00 ± 0.50) index peaked at 14:00 h. The mean body temperatures for rectal probe, digital, mercury-in-glass, and infrared thermometers were 38.35 ± 0.11°C, 37.24 ± 0.04°C, 36.76 ± 0.06°C, and 36.92 ± 0.07°C, respectively. In comparison to the rectal probe, the mean bias for digital (-1.11 ± 0.05°C), mercury-in-glass (-1.59 ± 0.07°C), and infrared thermometers (-1.38 ± 0.07°C) was large. The Passing-Bablok regression plot demonstrated significant deviation from linearity (p < 0.01) when digital, infrared, and mercury-in-glass thermometers were compared to the rectal probe. The area under the curve (AUC) for digital (AUC: 0.7005 ± 0.01 [95%: 0.6853 - 0.7310], infrared (AUC: 0.6711 ± 0.01 [95%: 0.6322 - 0.7100], and mercury-in-glass (AUC: 0.6321 ± 0.01 [95%: 0.6001 - 0.7873] thermometers showed poor accuracy with low sensitivity. In conclusion, the use of digital, mercury-in-glass, and infrared thermometers in recording body temperature in donkeys during the hot-dry season underestimated the values. Their use in measuring body temperature may result in wrong diagnosis, and compromise the control of hyperthermia and diseases associated with thermoregulatory impairments in donkeys.
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Affiliation(s)
- Friday Ocheja Zakari
- Department of Veterinary Physiology, Biochemistry and Pharmacology, Faculty of Veterinary Medicine, University of Jos, Jos, Nigeria.
| | - Joseph Olusegun Ayo
- Department of Veterinary Physiology, Faculty of Veterinary Medicine, Ahmadu Bello University, Zaria, Nigeria
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Dos Santos MM, Souza-Junior JBF, Dantas MRT, de Macedo Costa LL. An updated review on cattle thermoregulation: physiological responses, biophysical mechanisms, and heat stress alleviation pathways. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:30471-30485. [PMID: 33895955 DOI: 10.1007/s11356-021-14077-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 04/19/2021] [Indexed: 06/12/2023]
Abstract
Heat stress is one of the main obstacles to achieving efficient cattle production systems, and it may have numerous adverse effects on cattle. As the planet undergoes climatic changes, which is predicted to raise the earth's average temperature by 1.5 °C between 2030 and 2052, its impact may trigger several stressful factors for livestock. Among these, an increase in core body temperature would trigger physiological imbalance, consequently affecting reproduction, animal health, and dry matter intake adversely. Core body temperature increase is commonly observed and poses challenges to livestock farmers. In cattle farming, thermal stress severely affects milk production and weight gain, and can compromise food security in the coming years. This review presents an updated approach to the physiological and thermoregulatory responses of cattle under various environmental conditions. Strategies for mitigating the harmful effects of heat stress on livestock are suggested as viable alternatives for the betterment of production systems.
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Affiliation(s)
- Mateus Medeiros Dos Santos
- Laboratory of Biometeorology and Environmental Biophysics, Universidade Federal Rural do Semi-Árido, Mossoró, Brazil
| | | | - Maiko Roberto Tavares Dantas
- Laboratory of Biometeorology and Environmental Biophysics, Universidade Federal Rural do Semi-Árido, Mossoró, Brazil
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Moreira GM, Aguiar GL, Meneses JAM, Luz MHD, Monteiro MGBB, Lara L, Ladeira MM, Souza JCD, Duarte MDS, Gionbelli MP. The course of pregnancy changes general metabolism and affects ruminal epithelium activity pattern in Zebu beef heifers. Livest Sci 2021. [DOI: 10.1016/j.livsci.2021.104496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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