Características corporais associadas com a adaptação ao calor em bovinos naturalizados brasileiros

Bianchini, Eliandra; McManus, Concepta; Lucci, Carolina Madeira; Fernandes, Marcos César Barbosa; Prescott, Elianne; Mariante, A. da S.; Egito, A. A. do

doi:10.1590/s0100-204x2006000900014

Cited by 64 publications

(55 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Bianchini et al (2006) citam, em pesquisa com diferentes grupos genéticos de bovinos naturalizados brasileiros e exóticos, que animais de raças puras de origem indiana, como também animais naturalizados, apresentaram características mais condizentes com a tolerância ao calor. Azevedo et al (2008) mantiveram a TR dentro da normalidade para a espécie bovina, independente do período do ano, sexo, idade e horário, indicando a adaptação da raça ao ambiente, e sugerem mais pesquisas para determinação dos valores críticos para esses índices, em especial para animais adaptados ao clima tropical.…”

Section: Resultsunclassified

“…A zona de conforto térmico para bovinos depende de vários fatores, como raça, idade, sexo e do grau de tolerância ao calor, que pode estar ligado às características corporais e aos fatores genéticos (Bianchini et al, 2006). Segundo Ferreira (2005) podese considerar, como zona de conforto térmico (ZCT) para zebuínos, temperaturas na faixa de 10 a 27 ºC, sendo o limite crítico superior de 35 o C (Baeta & Souza, 2010), com umidade relativa do ar entre 50 e 70%.…”

Section: Introductionunclassified

See 1 more Smart Citation

Termorregulação e desempenho de tourinhos Sindi e Guzerá, no agreste paraibano

Furtado¹,

Peixoto²,

Regis³

et al. 2012

Rev. bras. eng. agríc. ambient.

View full text Add to dashboard Cite

R ESU M ONeste trabalho objetivou-se avaliar os índices bioclimáticos que influenciam as varáveis fisiológicas, desempenho e consumo de nutrientes de tourinhos das raças Gir e Guzerá. O estudo foi realizado na Estação Experimental de Alagoinha/EMEPA-PB, no município de Alagoinha, no agreste paraibano, Brasil, utilizando-se 16 tourinhos das raças Sindi e Guzerá (8 animais de cada raça), com média de 31,5 ± 1,5 meses de idade, mantidos confinados. O delineamento estatístico utilizado foi o de blocos inteiramente casualizados, com 8 repetições, em parcelas subdivididas, com raça na parcela principal e horários (6, 12 e 16 h) na subparcela. A temperatura retal, frequência respiratória e temperatura superficial dos animais se mantiveram dentro da faixa considerada normal para a espécie bovina. Não houve influência negativa no consumo de nutrientes e os animais tiveram um desempenho em ganho de peso acima do esperado, demonstrando que estão adaptados às condições de Nordeste brasileiro, já que não houve alterações em seus parâmetros fisiológicos, considerados dentro da faixa normal e ainda apresentaram excelente desempenho produtivo e de consumo de nutrientes.Palavras-chave: adaptabilidade, ambiência, desempenho produtivo Thermoregulation and performance of Sind and Guzera young bulls in 'Agreste' region of Paraiba State A B ST R A C T The objective of this study was to evaluate the bioclimatic indices that influence physiological variables, performance and nutrient intake by Gir and Guzera young bulls. The work was conducted at the Experimental Station of Alagoinha/EMEPA-PB in Alagoinha town in 'Agreste' region of Paraiba state, Brazil, using 16 young bulls of Sind and Guzera breeds (8 animals of each breed), with a mean 31.5 ± 1.5 months of age, kept under confined conditions. The statistical design used was randomized blocks with eight replications in split plot with breed in the main plot and time (6, 12 and 16 h) as subplots. Rectal temperature, respiratory rate and surface temperature of the animals remained within the normal range for the bovine species. There was no negative influence on food intake and the animals had weight gain higher than expected, demonstrating that they are adapted to the conditions of northeastern Brazil, since there were no changes in their physiological parameters considered within the normal range and still showed excellent growth performance and nutrient intake.

show abstract

Section: Resultsunclassified

Section: Introductionunclassified

Termorregulação e desempenho de tourinhos Sindi e Guzerá, no agreste paraibano

Furtado¹,

Peixoto²,

Regis³

et al. 2012

Rev. bras. eng. agríc. ambient.

View full text Add to dashboard Cite

show abstract

“…This shows that these animals were in a situation of thermal discomfort compared with ½ HO and ¾ HO. Bianchini et al (2006) reported that Holstein has a smaller area of tissue occupied by sweat glands, which may indicate greater adaptive difficulty compared with Zebu cattle, which have greater ability to eliminate sweat and greater ability to adapt to heat. However, several factors that may affect body temperature must be taken into consideration, such as the relative humidity of the environment, physiological state of the animal, production level of the cow, as well as time in relation to feeding and milking (Colak et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

Infrared thermography as a method for evaluating the heat tolerance in dairy cows

et al. 2017

Self Cite

View full text Add to dashboard Cite

-The objective of this study was to determine whether infrared thermography is a useful tool for the recognition of dairy cows in a state of thermal heat stress, as well as to identify the best region of the animal to be evaluated for this recognition. Physiological variables, including rectal temperature, respiratory frequency, cardiac frequency, and panting score were recorded in 38 lactating cows. For the assessment of environmental parameters, a digital black globe thermometer (TGD-200 model) was used. Thermographic photographs of different regions of the body of cows were taken using an infrared camera (FLIR ® System T300) and indicated respective superficial temperature. Physiological variables and superficial body temperature in different regions varied between genetic groups (Girolando: ½ Holstein × ½ Gir and ¾ Holstein × ¼ Gir; purebred Holstein). The environmental temperature ranged from 20.7 to 37.9 °C with a relative humidity reaching 95%. The mean rectal temperature (40.84 °C), respiratory frequency (111.36 breaths/min), and cardiac frequency (99.22 beats/min) were higher for pure Holstein than for Girolando cows. Positive correlations were found between the physiological parameters and thermographic measures. The highest positive correlation (0.74) was found between the temperature in the lateral region of the udder and rectal temperature. Thermography is a good indicator of thermal comfort. The best region to identify heat stress in cows using thermography is the lateral region of the udder.

show abstract

“…Adult Pantaneiro cows showed lower average height at withers, body length and thoracic perimeter than the ones found by Bianchini et al (2006), working with both females and males of several locally adapted Brazilian breeds such as Curraleiro Pé-Duro, Junqueira, Pantaneira, Crioula Lageana and Mocho Nacional, as well as two commercial breeds: Nellore and Holstein. The same authors found that breed influenced body measurements such as body length, height at withers, and thoracic perimeter, and that sex influenced body length, which may explain the differences found between the two studies.…”

Section: Discussionmentioning

confidence: 68%

Growth curve of locally adapted pantaneiro cows raised under natural conditions

et al. 2013

Self Cite

View full text Add to dashboard Cite

-The objective of this study was to use morphometric and ultrasound evaluations to estimate the growth curve of the Pantaneiro cattle breed, raised in its natural habitat, aiming at the re-insertion of this breed in production systems. One hundred and three females, aging from months to 11 years, and raised on native pastures, were evaluated. The animals belonged to the Conservation Nucleus of Embrapa Pantanal, located in the Pantanal of Mato Grosso do Sul (Brazil). Weight, thoracic perimeter (TP), body length (BL), rump height (RH), height at withers (HW), hip height (HH), depth (DP), distance between the ilia (DI) (cm) and rib-eye area (REA) were measured. To relate the measurements with the age of the animals, the univariate regression model was used, assigning the variable response to gamma distribution. The Pearson correlation between variables was also estimated. The inflection point of the growth curve was 37 months for HH; between 38 and 39 months for TP and HW; between 40 and 41 months for DI, HH and DP; and 45 months for BL. The REA results could not fit in a statistical model. The majority of the variables presented a correlation above 60% among themselves, except for REA × Age, of 15.81%; REA × HW, of 34.44%; HH × Age, of 46.19; HH × DI, of 58.07%; REA × HH, of 24.57%; and REA × TP, of 39.9%. The cows showed maturity age at 40 months, which may have occurred because they were raised in natural farming conditions. In Pantaneiro cows reared in extensive systems only on natural pastures, the use of ultrasound is not effective to estimate the curve of muscular development, perhaps because this breed was not selected for weight gain.

show abstract

Características corporais associadas com a adaptação ao calor em bovinos naturalizados brasileiros

Cited by 64 publications

References 7 publications

Termorregulação e desempenho de tourinhos Sindi e Guzerá, no agreste paraibano

Termorregulação e desempenho de tourinhos Sindi e Guzerá, no agreste paraibano

Infrared thermography as a method for evaluating the heat tolerance in dairy cows

Growth curve of locally adapted pantaneiro cows raised under natural conditions

Contact Info

Product

Resources

About