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| Registros recuperados: 81 | |
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| Abbas,G; Ahmad,F; Saeed,M; Ayasan,T; Mahmood,A; Yasmeen,R; Kamboh,A. |
| ABSTRACT The aim of this project was to investigate the effect of dietary inclusion of sodium bicarbonate (NaHCO3) on nutrient digestibility and immune response of caged layers during summer when the temperature exceeds 40 ˚C. For immune response trial, White Leghorn layers (n=160; 24 weeks old) were purchased from a poultry farm and were divided into five treatment/diets groups (4 replicate/treatment). Diet A, was without NaHCO3 and served as control whereas, diets B, C, D, and E contained 0.5, 1.0, 1.5 and 2.0% NaHCO3, respectively. All these birds were vaccinated against Newcastle disease (ND) virus at the start of the experiment and thereafter with one-month intervals. Blood samples were collected from two birds/replicate at 10 days post vaccination... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Heat stress; Layers; Newcastle disease; Nutrient digestibility; Sodium bicarbonate. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000200339 |
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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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| Ajakaiye,JJ; Pérez-Bello,A; Cuesta-Mazorra,M; García-Díaz,JR; Mollineda-Trujillo,Á. |
| A 30-day experiment involving 720 White Leghorn (L33) layer chickens of 39 weeks of age and average live weight of 1.8 ± 0.04 kg was carried out in a completely randomized design to evaluate the effects of vitamins C and E on erythrocyte parameters of layers during natural summer conditions. Birds were allotted to 4 treatments containing 0, 150 mg vitamin C, 150 mg vitamin E, and 150 mg vitamin C plus 150 mg vitamin E/kg feed. Each treatment was replicated four times. The exposure of layers to 31±3 °C and 33±0 °C ambient temperature and 84.6% and 81.5% relative humidity, inside and outside the experimental pen, during the study period caused an increase in temperature humidity index 15.5 above the threshold value of 70 established for this species. Total... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Erythrocyte index; Heat stress; Hematocrit; Hemoglobin. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2010000300010 |
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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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| Barbosa Filho,José A. D.; Queiroz,Marília L. V.; Brasil,Daniel de F.; Vieira,Frederico M. C.; Silva,Iran J. O.. |
| The objective of this study was to characterize the microclimatic profile of broiler transport trucks under commercial conditions, in the summer, by continuous monitoring of environmental variables (temperature and air relative humidity). Three loads were monitored from farm to slaughterhouse, considering factors such as distance and day periods (morning, afternoon, and night). To obtain the profile of the environmental variables during journey, data loggers, that determined the microclimate to which birds were submitted, were installed in the trucks; data loggers also allowed visualization of the Enthalpy Comfort Index (ECI) so that load regions could be classified according to heat comfort limits for 6-week old poultries. Temperature, relative humidity,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Poultry farming; Animal welfare; Pre-slaughter operations; Heat stress. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000300003 |
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| Barbosa Lima,R; Silva,JHV da; Givisiez,PEN; Martins,TDD; Saraiva,EP; Costa,FGP; Macari,M. |
| High environmental temperatures have a negative effect on the production efficiency of poultry reared in hot climates. This study evaluated the efficiency of electrolyte supplementation under high environmental temperature conditions by manipulating water and feed electrolyte balance (EB) on the survival and performance of European quails. In experiment 1, a completely randomized experimental design was applied in a 4 x 2 factorial arrangement. Treatments consisted in four feed EB values (0, 120, 240, 360 mEq/kg), and two environmental temperatures (25 and 34 ºC). Feed electrolyte balance was manipulated by the addition of sodium bicarbonate and ammonium chloride. In experiment 2, birds were randomly distributed according to a 5 x 2 factorial arrangement.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ammonium chloride; Heat stress; Sodium bicarbonate. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000300004 |
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| Bautista Martínez, Yuridia. |
| Se estudiaron los efectos del estrés calórico (40° C) y el tiempo de espera a la matanza (h) sobre el color y las características fisicoquímicas de la carne de pechuga de pollo. Los tratamientos fueron dos horas a 40 °C (2h EC) y, dos horas y ocho horas sin estrés calórico (2h NO-EC y 8h NO-EC, respectivamente). La carne se obtuvo de pollos de engorda de la línea Ross de seis semanas de edad. Las variables de respuesta fueron el color en términos de L*, a* y b* (luminosidad, índice de rojo e índice de amarillo, respectivamente) y las características fisicoquímicas: pH, pérdidas por goteo (PG), resistencia al corte (RCo, kg cm-2, y kg g-1), rendimiento por cocción (RC) y capacidad de retención de agua (CRA). Finalizado el tiempo de espera, se midieron... |
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Palavras-chave: Calidad de carne; Estrés calórico; Tiempo de espera; Meat quality; Heat stress; Tiemeout; Ganadería; Maestría. |
| Ano: 2013 |
URL: http://hdl.handle.net/10521/1855 |
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| Beux,Simone; Cassandro,Martino; Nogueira,Alessandro; Waszczynskyj,Nina. |
| ABSTRACT The objective of this study was to evaluate the effect of temperature-humidity index (THI) on the milk coagulation properties of Holstein-Friesian dairy cattle from northeast part of Italy. A total of 592 individual milk samples from six dairy herds were evaluated. The milk coagulation properties traits analysed were milk rennet coagulation time and curd firmness, as well as the fat, protein, and casein contents, pH, milk aptitude to coagulate (IAC), and the somatic cell count. The THI was determined during the periods of sample collection. The THI results showed that values of up to 75 did not significantly change the IAC values; however, when the THI values were above 75, the IAC decreased significantly. The control of THI can be used to... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Clotting; Curd firmness; Dairy cow; Heat stress. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000500429 |
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| Campos,Paulo Henrique Reis Furtado; Le Floc'h,Nathalie; Noblet,Jean; Renaudeau,David. |
| ABSTRACT Global warming is one of the major environmental threats facing the world in the 21st century. This fact will have a significant impact on pig production due to its direct effects on welfare, health, and performance of pigs. Besides, the effects of high temperatures will presumably become more important over the next decades due to the development of pig production in developing countries mainly located in tropical and subtropical areas, where animals are often exposed to ambient temperatures above their thermal comfort zone. Furthermore, pigs reared in tropical areas are often confronted to sanitary challenges including poor hygiene conditions, lack of respect for sanitary rules, and pathogens. This results in the stimulation of the immune system... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal biometereology; Heat stress; Metabolism; Physiology. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000600537 |
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| Cario, Anais; Mizgier, Alex; Thiel, Axel; Jebbar, Mohamed; Oger, Phil M.. |
| Most Thermococcales accumulate di-myo-inositol-phosphate (DIP) as an organic solute as a response to heat stress. We have studied the accumulation of this osmolyte in the high-hydrostatic pressure adapted hyperthermophile Thermococcus barophilus. We found no accumulation of DIP under any of the stress conditions tested, although this archaeon harbors the 3 DIP synthesis genes. Lack of synthesis is due to the lack of expression of TERMP_01135 coding for the second step of DIP synthesis. In contrast to other species, the T. barophilus synthesis operon is interrupted by a four gene locus, in reverse orientation. Restoring an operon like structure at the DIP locus restored DIP synthesis, but did not have an impact on growth characteristics, suggesting that... |
| Tipo: Text |
Palavras-chave: High hydrostatic pressure; Heat stress; Di-myo-inositol-phosphate; Thermococcus barophilus. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00270/38113/37216.pdf |
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| CARVALHO,Giovanna Araújo de; SALMAN,Ana Karina Dias; CRUZ,Pedro Gomes da; SILVA,Francyelle Ruana Faria da; HALFEN,Jéssica; SCHMITT,Eduardo. |
| ABSTRACT The relationship between the indices of thermal comfort and internal temperature in lactating cows was evaluated inRondônia, western Amazonia in a 2 × 2 crossover trial carried out with eight Girolando cows, ½ Holstein × ½ Gyr (n=4) and – Holstein × ¼ Gyr (n=4), grazing palisade grass supplemented with or without soybean oil concentrates. Data logger thermometers adapted to intravaginal devices (hormone free) were used to measure internal temperatures (IT) every 10 min over 48 h. Concomitantly, environmental parameters (air temperature, relative humidity, wind speed, and solar radiation) were collected for the estimation of the temperature-humidity index (THI), equivalent temperature index (ETI), and predicted respiratory rate (PRR).... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Heat stress; Holstein × Zebu; Dairy cattle; Environmental stress index. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672018000300191 |
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| Choi,Yo Han; Hosseindoust,Abdolreza; Kim,Min Ju; Kim,Kwang Yeol; Lee,Jun Hyung; Kim,Young Hwa; Kim,Jin Soo; Chae,Byung Jo. |
| ABSTRACT The present study investigated the impacts of additional feeding (AF; containing 16% excess feed than control diet in the last two weeks of gestation) during late gestation period and different backfat thickness (BFT) including low (<20 mm) and high (≥20 mm) backfat on reproductive performance, litter size, blood metabolites, hormonal profiles, colostrum, and milk composition of sows from day 90 of gestation to farrowing, and from farrowing to weaning during summer (average 28.3 °C). Fifty-four crossbred sows (Yorkshire × Landrace) were allotted to one of four treatments according to a 2×2 factorial arrangement. There was no AF×BFT interaction for any of the measured variables. The body weight change of sows was decreased for <20 mm in BFT... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Backfat thickness; Gestating sows; Heat stress; Reproductive traits. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100522 |
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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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| 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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| Cottin, D; Ravaux, J; Leger, N; Halary, S; Toullec, J; Sarradin, Pierre-marie; Gaill, F; Shillito, B. |
| The annelid Paralvinella grasslei is a deep-sea vent endemic species that colonizes the wall of active chimneys. We report here the first data on its thermal biology based on in vivo experiments in pressurized aquaria. Our results demonstrate that P. grasslei survives a 30 min exposure at 30 degrees C, and suggest that the upper thermal limit of this species is slightly above this temperature. The first signs of stress were noticed at 30 C, such as a significant increase in the animal's activity and the expression of HSP70 stress proteins. A preliminary investigation of the kinetics of stress protein expression surprisingly showed high levels of HSP70 proteins as late as 3.5 h after the heat shock. Finally, we provide here the first sequences for vent... |
| Tipo: Text |
Palavras-chave: IPOCAMP; Annelids; Heat stress; Stress response; Heat shock proteins; Hydrothermal vents. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-4570.pdf |
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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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| Registros recuperados: 81 | |
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