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| Registros recuperados: 81 | |
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| Silva, Érica Carla Lopes da; UFRPE; Modesto, Elisa Cristina; UFRPE; Azevedo, Marcílio de; UFRPE; Ferreira, Marcelo de Andrade; UFRPE; Dubeux Junior, José Carlos Batista; UFRPE; Schuler, Alexandre Ricardo Pereira; UFPE. |
| O trabalho teve como objetivo avaliar a produção, composição e o perfil de ácidos graxos do leite, parâmetros fisiológicos e atividades comportamentais de vacas da raça Pitangueiras, submetidas à condição de pastejo com e sem acesso à sombra. O ambiente foi monitorado diariamente em uma estação meteorológica. O delineamento experimental foi o inteiramente casualizado, sendo que 20 vacas em lactação foram divididas em piquetes nos tratamentos com e sem acesso à sombra. Não houve diferença (p > 0,05) entre os tratamentos quanto às variáveis fisiológicas, produção, composição e perfil de ácidos graxos do leite. Os animais com acesso à sombra buscaram o sombrite nos horários em que os índices de conforto térmico foram mais elevados. No turno da tarde os... |
| Tipo: Pesquisa de campo;análise laboratorial |
Palavras-chave: Ácidos graxos; Comportamento; Estresse térmico; Fatores ambientais; Temperatura retal ciências agrárias acids fatty; Behavior; Environment; Heat stress; Shading; Dairy cows. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/5279 |
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| Amaral, Daniele Francine; UEM; Barbosa, Orlando Rus; UEM; Gasparino, Eliane; UEM; Akimoto, Luciene Setsuko; UEM; Lourenço, Fábio José; UEM; Santello, Graziela Aparecida; UEM. |
| Avaliou-se a suplementação de proteína (12% de proteína bruta (PB) (T1) e 16% de PB (T2)) na temperatura retal (TR), frequências respiratória (FR) e cardíaca (FC), glicose (Gl), albumina (Alb), proteínas totais (PT), triiodotironina (T3) e tiroxina (T4) de 16 ovelhas Santa Inês, 16 Texel e 15 Ile de France. A FR não diferiu no T1 e T2 na Santa Inês e Ile de France, sendo maior na Texel no T2. FR aumentou na primavera, na Texel, seguida da Ile de France e pela Santa Inês e caiu no outono para Santa Inês e Ile de France. FR foi maior à tarde, na Texel, na Ile de France e na Santa Inês. Maior FC na Santa Inês e Texel no T1 e menor na Ile de France. FC na Santa Inês foi superior nas estações do ano, e na primavera maior para todas as raças. Maior Gl, PT, Alb e... |
| Tipo: Pequisa de campo |
Palavras-chave: Dieta; Proteína; Condições climáticas estresse térmico; Hormônios; Ovelhas Ecologia dos Animais Domésticos e Etologia diet; Protein; Weather conditions; Heat stress; Hormones; Sheep. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/4920 |
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| Silva Filho, Florisval Protásio; Universidade Federal Rural de Pernambuco; Azevedo, Marcílio de; Universidade Federal Rural de Pernambuco; Costa, Lígia Alexandrina Barros da; Universidade Federal Rural de Pernambuco; Lana, Ângela Maria Quintão; Universidade Federal de Minas Gerais; Ferreira, Marcelo de Andrade; Universidade Federal Rural de Pernambuco; Batista, Ângela Maria Vieira; Universidade Federal Rural de Pernambuco. |
| This study evaluated the influence of coat color on the heat tolerance and performance of 21 Santa Inês lambs, non-pregnant, non-lactating, seven animals of each coat color: black, brown and white, with an average initial weight of 25.71, 24.85 and 25.00 kg, for white, brown and black animals, respectively, and 12 months of age. The study was conducted during summer in the agreste region of Pernambuco State, Brazil. Twenty-one sheeps were assigned to a completely randomized design with three treatments and seven replicates. The heat tolerance index and the animal performance were evaluated once a week for eight weeks. White sheep were slightly superior in heat tolerance to brown and black sheep, 88.3, 85.5 and 86.6 respectively, but this was not... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Adaptation; Bioclimatology; Climate; Heat stress. |
| Ano: 2013 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/18466 |
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| Souza, Elaine Coimbra de; Salman, Ana Karina Dias; Cruz, Pedro Gomes da; Veit, Hemerson Maciel; Carvalho, Giovanna Araújo de; Silva, Francyelle Ruana Faria da; Schmitt, Eduardo. |
| To compare the integrated crop-livestock-forest (ICLF) and crop-livestock (ICL) systems in relation to thermal comfort and grazing behavior of Girolando heifers, a 2 × 2 crossover trial (two system and two periods) was carried out with eight ¾ Holstein × ¼ Gyr heifers in Xaraés–palisade grass pasture under intermittent stocking with 10 days of occupation period and 20 days of resting. In ICLF, crown cover of eucalyptus planted in rows was 65% at the beginning of the experiment. Animal behavior was assessed through bioacoustics by recording heifers’ sounds for 48 hours. Concomitantly, heifers’ internal temperature (IT,°C) was recorded every 10 min using data logger thermometers adapted to hormone-free intravaginal devices. Air temperature and humidity data... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 2.04.04.00-0 Agrosilvopastoral; Wellbeing; Heat stress. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/46483 |
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| Lima, Ivalda de Albuquerque; Universidade Federal Rural de Pernambuco; Azevedo, Marcilio de; Universidade Federal Rural de Pernambuco; Borges, Christhiano Raphael de Albuquerque; Universidade Federal Rural de Pernambuco; Ferreira, Marcelo de Andrade; Universidade Federal Rural de Pernambuco; Guim, Adriana; Universidade Federal Rural de Pernambuco; Almeida, Gledson Luiz Pontes de; Universidade Federal Rural de Pernambuco. |
| This work was carried out to evaluate the physiological thermoregulation responses of Girolando-breed dairy cows kept in feedlot during summertime. A total of 15 animals were used, belonging to three genetic groups: 1/2, 5/8 and 3/4 Holstein-Gir (HG), with five cows from each genetic group, distributed in a completely randomized design, in subplots. The physiological parameters were sweat rate (SR), respiratory rate (RR), epidermis temperature (ET) and coat surface temperature (CST), and were evaluated once a week, during nine weeks, from December 2009 to February 2010, totaling 135 observations. Throughout the experimental period, climatic data were recorded using an automated weather station, and later used to calculate the different thermal comfort... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dairy cattle raising; Heat stress; Physiological parameters. |
| Ano: 2012 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/16591 |
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| Ahmad, Saghir; Iqbal, Muhammad; Muhammad, Taj; Mehmood, Abid; Ahmad, Shakeel; Hasanuzzaman, Mirza. |
| Due to high temperatures in arid regions, cotton crop emergence and early establishment of seedlings are adversely affected. Field studies were undertaken to quantify the effects of transplantation of cotton (Gossypium hirsutum L.) seedlings during the early part of the growing season (March) and crop season (May) for potential realization of cotton productivity under the harsh weather of the southern part of Punjab province, Pakistan. Treatments, consisting of (a) two planting dates (March and May), and (b) two sowing methods (transplanting of seedlings and direct seeding), were arranged in a randomized complete-block design with four replications. Results showed that transplanting seedlings improved the productivity of cotton by 14.2% over direct... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Heat stress; Irrigated arid environment; Planting techniques; Planting time.. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/34610 |
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| Mazzi,C.M.; Ferro,M.I.T.; Coelho,A.A.D.; Savino,V.J.M.; Macari,M.; Ferro,J.A.; Givisiez,P.E.N.; Giachetto,P.F.; Silva,M.M.; Dionello,N.J.L.. |
| The variation in cloacal temperature, body weight loss and expression of the 70 kDa heat shock protein (Hsp70) in three naked neck broiler genotypes during heat stress were studied. Twelve birds of each genotype (Na/Na, Na/na and na/na) were reared to market weight (approximately 2.1kg) at thermoneutral temperature. Six birds from each group served as controls and the remaining six underwent gradual heat stress (from 28ºC to 36ºC). Cloacal temperature and body weight were measured before and after exposure to heat. Liver samples were collected and Hsp70 levels were quantified using western blotting with monoclonal anti-chicken Hsp70 antibody. Heterozygous (Na/na) birds had a significantly lower cloacal temperature variation and less body weight loss during... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Broiler chicken; Naked neck genotype; Hsp70 expression; Heat stress; Cloacal temperature. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352002000100006 |
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| Moreira,T. F.; Facury Filho,E. J.; Meneses,R. M.; Mendonça,F. L. M.; Lima,J. A. M.; Carvalho,A. U.. |
| ABSTRACTWe used 31 crossbreed dairy cows to compare the energetic profile in summer and winter. Blood samples were taken weekly prepartum, at calving and on days 2, 5, 10, 15, 21 and 30 postpartum. All metabolic indicators analyzed were influenced by the physiological status. The glucose concentrations were higher during winter while the triglyceride concentrations and lactate dehydrogenase (LDH) were higher in the summer. The season influenced the concentrations of cholesterol, AST and GGT, showing a different pattern between summer and winter. Non-esterified fatty acids (NEFA) and beta-hidroxibutirate (BHB) were not influenced by the season. Cows that calved during winter had a greater body condition score (BCS) and lost more BCS until calving. During... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: NEFA; Monitoring; Herd health; Heat stress. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352015000501327 |
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| Correa-Calderón,A.; Morales,M.; Avendaño,L.; Leyva,C.; Rivera,F.; Díaz,R.; Soto-Navarro,S.. |
| The effects of a cooling system on productive efficiency and welfare of Holstein steers were evaluated during the summer. Sixty steers in the finishing phase were randomly allotted to one of two treatment-groups. Animals of control group were only provided with shade (non-cooled group) and a group of animals under a cooling system were installed in the shaded area (cooled group), which were operated daily from 09am to 6pm during the 69d of the study. The averages of environmental temperature and relative humidity were 35.4°C and 35.3%, respectively, with a temperature-humidity index average of 81.4 during the study. Individual body weight was recorded every two weeks, while body surface temperature and respiratory frequency were recorded three times per... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Steer; Cooling system; Feedlot; Heat stress; Performance. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352010000500024 |
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| Ribeiro,Rafael Vasconcelos; Santos,Mauro Guida dos; Pimentel,Carlos; Machado,Eduardo Caruso; Oliveira,Ricardo Ferraz de. |
| Low water availability and high temperatures occur under field conditions and we hypothesize that the critical temperature for photochemical damage (TC) in common bean (Phaseolus vulgaris L.) plants is increased by the occurrence of previous water deficit in a genotype-dependent manner. Five common bean cultivars A320, A222, Carioca, BAT477 and Ouro Negro were evaluated. Thirty days after seedlings emergence, one group of plants was exposed to water deficit for ten days and rehydrated and another one was maintained well hydrated during the experimental period. The minimum chlorophyll fluorescence (FO) was monitored in leaf discs exposed to temperatures ranging from 25 to 45 oC and the TC values estimated. The previous water deficit did not affect TC, which... |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Chlorophyll fluorescence; Hardening; Heat stress; Phaseolus vulgaris; Tolerance. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052015000400374 |
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| Tang,J.; Jiang,Y.; Tang,Y.; Chen,B.; Sun,X.; Su,L.; Liu,Z.. |
| Gut-derived endotoxin and pathogenic bacteria have been proposed as important causative factors of morbidity and death during heat stroke. However, it is still unclear what kind of damage is induced by heat stress. In this study, the rat intestinal epithelial cell line (IEC-6) was treated with heat stress or a combination of heat stress and lipopolysaccharide (LPS). In addition, propofol, which plays an important role in anti-inflammation and organ protection, was applied to study its effects on cellular viability and apoptosis. Heat stress, LPS, or heat stress combined with LPS stimulation can all cause intestinal epithelial cell damage, including early apoptosis and subsequent necrosis. However, propofol can alleviate injuries caused by heat stress, LPS,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Propofol; Heat stress; Lipopolysaccharides; Apoptosis; Intestinal epithelial cells. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2013000600507 |
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| Dias,Ana S.; Fernando,Ana L.; Lidon,Fernando C.. |
| Genotypes of bread and durum wheat were submitted to heat stress after anthesis and the accumulation of Na, K and P, at booting, grain filling and maturity, were investigated. It was found that, after anthesis, the levels of Na in shoots were considerably higher in durum relatively to bread wheat, being this trend also observed in the total plant accumulation. In these genotypes, heat stress affected significantly Na concentration in shoots. In general, heat stressed plants had significant higher levels of K in the shoots and the proportion of this nutrient translocation from the roots also increased with heat stress. In general, the levels of P didn't show significant differences with heat stress. The effects of heat stress among the wheat genotypes life... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Triticum aestivum L.; Triticum turgidum subsp. Durum; Heat stress; Nutrients uptake; Nutrients translocation. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202009000200007 |
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| Costa,Ernany Santos; Bressan-Smith,Ricardo; Oliveira,Jurandi Gonçalves de; Campostrini,Eliemar; Pimentel,Carlos. |
| Bean (Phaseolus vulgaris L., cv. Carioca and cv. Negro Huasteco) and cowpea plants (Vigna unguiculata L. Walp cv. Epace 10) were grown in a growth chamber with PPF at leaf level of 200 mumol.m-2.s-1 and air temperature 25 + 1 ºC. The first fully expanded pair of leaves of 12-day-old plants was submitted to high temperature stress (25, 30, 35, 40, 45 and 48 ºC) for 1.5 h. The photochemical efficiency of PSII during recovery was monitored by means of chlorophyll a fluorescence at six different times (0.5, 1, 2, 4, 24, and 48 h) after stress, at 25 ºC, using a modulated fluorimeter. Increasing temperature promoted an increase in Fphi at 45 ºC, possibly associated with dissociation of the light harvesting complex from the reaction centre of PSII, but a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chlorophyll a fluorescence; Heat stress; Photosynthesis. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202002000200004 |
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| Registros recuperados: 81 | |
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