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| Registros recuperados: 82 | |
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| Rocha, Ronne-von Ribeiro da; Universidade Federal do Piauí; Oliveira, Petrônio Batista de; Universidade Federal do Piauí; Nunes, Amaury Guimarães; Universidade Federal do Piauí; Silva, Tairon Pannunzio Dias e; Universidade de São Paulo; Pereira, Alécio Matos; Universidade Federal do Piauí; Torreão, Jacira Neves da Costa; Colégio Técnico de Bom Jesus. |
| Current analysis evaluated adaptive parameters and thermal comfort of postpartum ewes fed on concentrate supplementation in grazing system. Thirty lactating pluriparous sheep, 16 Santa Inês (SI) and 14 Morada Nova (MN) were used. Physiological parameters such as respiratory rate (RR), heart rate (HR) and rectal temperature (RT) were measured, in that order, with the animals at rest in the morning (6:00-7:00 am) and in the afternoon (1:00-2:00 pm), respectively, every seven days, with 10 samples. A significant effect (p < 0.05) for RR and HR was reported in the strain. Similar behavior was reported for RR between the breeds where MN sheep had high adaptability. Supplementation levels of 0.5 and 1.5% influenced (p < 0.05) RR which was stronger... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Environmental factors; Heat stress; Nutrition; Thermoregulation. |
| Ano: 2014 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/22823 |
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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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| Saracila,M; Criste,RD; Panaite,TD; Vlaicu,PA; Tabuc,C; Turcu,RP; Olteanu,M. |
| ABSTRACT The 21 days feeding trial was conducted on 90, Cobb 500 broilers (aged 14 days), assigned to 3 groups (C, E1 and E2) housed in an experimental hall at 32° C constant temperature and 23 h light regimen. During the growth period (14-35 days), the conventional diet (C) had corn and soybean meal as basic ingredients. Unlike the conventional diet formulation (C), the diet formulations for the experimental groups also included 0.005% Artemisia annua oil (E1) and 0.005% Artemisia annua oil plus 1% Artemisia annua powder (E2). Six broilers per group were slaughtered at 35 days of age in order to measure the weight of the carcass and internal organs of broilers, and samples of intestinal and caecal content were collected for bacteriological assessment... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Artemisia annua; Broiler chickens; Growth performance; Gut microbiota; Heat stress. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000400825 |
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| OH,Seung-Il; KIM,Jun-Sung; KIM,Chul-Kyu; YI,Sun Shin; KIM,Sung-Jo; PARK,Sang-Kyu. |
| Abstract It is suggested that oxidative stress induced by cellular reactive oxygen species is one of the major causal factors of aging. The effect of dietary supplementation of anti-oxidants on response to environmental stressors and lifespan has been studied in various model organisms. In the present study, we examine the effect of Artemisia annua extract on resistance to oxidative, heat, and ultraviolet stresses in the nematode Caenorhabditis elegans. Artemisia annua significantly increases survival under oxidative and heat stresses, however has no effects in response to ultraviolet stress. Then, we measured the in vivo changes in expression of stress-responsive genes by Artemisia annua using green fluorescence protein. The expression of hsp-16.2, known... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Artemisia annua; Oxidative stress; Heat stress; Lifespan; C. elegans. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612016000200356 |
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| Hajati,H; Zaghari,M; Oliveira,HC. |
| ABSTRACT This study was conducted to investigate the effects of Arthrospira platensis (Spirulina platensis, SP) on feed intake, feed conversion ratio, egg weight, hen day egg production, intestinal microflora, heat stress biomarkers, and HSP70 gene expression in laying Japanese quails (Coturnix coturnix japonica) suffering heat stress condition. A total of 250 female quails were allocated to 5 treatments, 5 replicates and 10 birds in each replicate in a completely randomized design. Experimental treatments included: 1) basal diet, 2) basal diet+ 0.03 % probiotic, 3) basal diet+ 0.1 % SP, 4) basal diet+ 0.3 % SP, 5) basal diet+ 0.5 % SP. During the last 6 days of the experiment, the quails were exposed to 8h of 34±1°C. The birds had free access to feed and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Egg production; Heat stress; HSP70 gene; Japanese quails; Spirulina platensis. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2020000100307 |
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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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| Peña,JEM; Vieira,SL; López,J; Reis,RN; Barros,R; Furtado,FVF; Silva,PX. |
| The aim of this study was to evaluate the effects of increasing doses of ascorbic acid (AA) and citric flavonoids (quercetin and rutin) on the performance and meat quality characteristics of broilers submitted to cyclic heat stress. Four-hundred one-day-old female Ross 308 were housed in 40 battery cages a in temperature controlled room. Treatments consisted of 0, 250, 500, and 1000 g/ton on of AA + citric flavonoids. Birds were fed ad libitum until 32 day of age. Beginning on day 14 post-hatch until the end of the experiment, in order to simulate cyclic heat stress, the temperature inside the room was increased to 32°C for 5 hours, and decreased until reaching the comfort temperature corresponding to the age of the animals. Birds were slaughtered at 33... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ascorbic acid; Broiler; Heat stress; Flavonoids. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2008000200008 |
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| Tizziani,Tarciso; Donzele,Rita Flávia Miranda de Oliveira; Donzele,Juarez Lopes; Balbino,Eric Márcio; Silva,Amanda Dione; Figueiredo,Érika Martins de; Muniz,Jorge Cunha Lima; Jacob,Rodrigo de Freitas. |
| ABSTRACT This study was conducted to evaluate the effect of reduction of the available phosphorus (avP) in diets supplemented with 500 FTU/kg phytase on performance, carcass characteristics, and bone mineralization of broilers aged 22 to 42 days kept in a high-temperature environment. A total of 336 Cobb broilers with an average initial weight of 0.883±0.005 kg were distributed in a completely randomized design with six treatments - a positive control (0.354 and 0.309% avP without addition of bacterial phytase for the phases of 22 to 33 and 34 to 42 days, respectively), and another five diets with inclusion of phytase (500 FTU) and reduction of the level of avP (0.354, 0.294, 0.233, 0.173, and 0.112%; and 0.309, 0.258, 0.207, 0.156, and 0.106% for the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bone mineralization; Carcass characteristics; Heat stress; Performance; Thermal environment. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016000200048 |
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| Santos,Tatiany Carvalho dos; Gates,Richard Stephen; Tinôco,Ilda de Fátima Ferreira; Zolnier,Sérgio; Baêta,Fernando da Costa. |
| Abstract: The objective of this work was to evaluate the combined effects of air temperature and air velocity on the behavior of Japanese quail (Coturnix coturnix japonica). A total of 216 Japanese quail in their initial laying phase were used. Bird behavior was categorized with an ethogram (eat, drink, stop, open wings/shiver, others). The experimental design was a randomized complete block, in a 4x4 factorial arrangement, with four air velocities (0, 1, 2, and 3 m s-1) and air temperatures (17, 23, 29, and 35°C). The behavior “stop” was greater when the birds were subjected to 17°C. At 35°C, a significant reduction (p<0.05) was observed in the behavior “eat” at 0 m s-1, compared with the other velocities. The behaviors of laying quail are similar in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coturnix coturnix japonica; Cold stress; Ethology; Heat stress; Thermal sensation. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000500344 |
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| Guerreiro,EN; Giachetto,PF; Givisiez,PEN; Ferro,JA; Ferro,MIT; Gabriel,JE; Furlan,RL; Macari,M. |
| In the present study we have investigated the effects of heat acclimation on brain and hepatic Hsp70 protein levels and body temperature of broiler chickens in response to gradual heat stress. Two groups of broilers were raised up to 47 days of age under distinct temperature conditions: thermoneutral (TN, according to bird age) or hot environmental (HS, 31-33°C). At 46 days of age, the birds reared at high ambient temperature were transferred to thermoneutrality conditions. After 18 h, these birds and the birds reared at thermoneutral temperature were submitted to gradual heat stress in a climatic chamber so that environment temperature was increased from 28 to 40ºC at a rate of 2ºC/h. Colonic temperature was measured using a thermometer sensor probe at... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acclimation; Broiler chickens; Heat shock protein; Heat stress. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2004000400002 |
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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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| Salles,Márcia Saladini Vieira; Zanetti,Marcus Antonio; Salles,Fernando André; Titto,Evaldo Antonio Lencioni; Conti,Renata Maria Consentino. |
| In order to evaluate the effect of environmental temperature on ruminal fermentation and on mineral levels of growing ruminants, it was used 12 male calves (initial average weight 82.9 ± 7.7 kg, 100 days of age), were employed in a randomized block design (by weight) experiment, with repeated weight measurement and two environmental temperatures: thermoneutral (24ºC) and heat-stressed (33ºC), during 38 days. The animals exposed to 33ºC presented lower dry matter ingestion, lower T3 (triiodothyronine) serum level, higher ammoniacal nitrogen (NH3-N) level in the rumen liquid, and higher rectal and body temperatures during all the experimental period when compared to the animals kept in thermoneutral environment (24ºC). The animals kept under heat stress... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ammoniacal nitrogen; Dry matter ingestion; Heat stress; Macromineral; Micromineral; Volatile fatty acids. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000400025 |
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| Pérez Hernández, Víctor Manuel. |
| El objetivo fue evaluar el comportamiento y fisiología de ganado bovino de doble propósito pastando sitios con cobertura arbórea alta (CAA), baja (CAB) y sin cobertura (SCA), en las épocas de lluvia y sequía. Se observaron vacas adultas durante 24 días en cada época, registrando la temperatura corporal y los tiempos que dedicaron a las distintas actividades durante el día. Las vacas dedicaron el mismo tiempo al consumo en las lluvias (P > 0.05), sin embargo, hubo mayor tiempo en CAB durante la sequía (P < 0.0001). Durante las lluvias, las vacas en pastoreo bajo CAA mostraron menor motivación de irse al descanso o iniciar la rumia (P<0.001), y mayor hacia la exploración que en otros tratamientos (P<0.001); durante la sequía, aquellas pastando en... |
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Palavras-chave: Comportamiento; Cobertura arbórea; Ganado bovino; Estrés calórico; Behavior; Tree cover; Cattle; Heat stress; Agroecosistemas tropicales; Maestría. |
| Ano: 2012 |
URL: http://hdl.handle.net/10521/1702 |
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| Mellado,Miguel; Lara,Laura Maricela; Veliz,Francisco Gerardo; Santiago,María Ángeles de; Avendaño-Reyes,Leonel; Meza-Herrera,Cesar; Garcia,José Eduardo. |
| The objective of this work was to obtain prevalence estimates of cloudy vaginal mucus in artificially inseminated Holstein cows raised under intense heat, in order to assess the effect of meteorological conditions on its occurrence during estrus and to determine its effect on conception rate. In a first study, an association was established between the occurrence of cloudy vaginal mucus during estrus and the conception rate of inseminated cows (18,620 services), raised under intense heat (mean annual temperature of 22°C), at highly technified farms, in the arid region of northern Mexico. In a second study, data from these large dairy operations were used to assess the effect of meteorological conditions throughout the year on the occurrence of cloudy... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dairy cattle; Heat stress; Reproductive efficiency; Seasonal pattern; Subclinical endometritis; Uterine infection.. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2015000600492 |
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| Pereira,DF; Nääs,A; Salgado,DA; Gaspar,CR; Bighi,CA; Penha,NLJ. |
| Animal welfare issues have received much attention not only to supply farmed animal requirements, but also to ethical and cultural public concerns. Daily collected information, as well as the systematic follow-up of production stages, produces important statistical data for production assessment and control, as well as for improvement possibilities. In this scenario, this research study analyzed behavioral, production, and environmental data using Main Component Multivariable Analysis, which correlated observed behaviors, recorded using video cameras and electronic identification, with performance parameters of female broiler breeders. The aim was to start building a system to support decision-making in broiler breeder housing, based on bird behavioral... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal welfare; Behavior; Heat stress. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2007000400001 |
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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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| Oliveira,Will Pereira de; Oliveira,Rita Flávia Miranda de; Donzele,Juarez Lopes; Oliveira Neto,Adhemar Rodrigues de; Gomes,Paulo Cezar; Maia,Ana Paula de Assis; Campos,Paulo Henrique Reis Furtado; Gasparino,Eliane. |
| This study was conducted to verify the effects of dietary crude protein reduction on growth and carcass performance of 22-42-day-old broilers reared under different temperatures. Treatments were set up in a five by two factorial arrangement, with five crude protein levels (220, 210, 200, 190 and 184 g/kg) and two temperatures (21.6 and 32.2 ºC). Diets were isocaloric and essential amino acid-to-lysine ratio was maintained constant in all treatments. There was no interaction between crude protein reduction and environmental temperature for any of the parameters evaluated. Crude protein had no influence on feed intake. Nevertheless, weight gain and feed conversion ratio were linearly influenced by crude protein reduction. Worse performance was also observed... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Breast yield; Heat stress; Temperature; Thermoneutral temperature. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000800010 |
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| Furlan,RL; Faria Filho,DE de; Rosa,PS; Macari,M. |
| Nutrition for broilers under high temperatures is extremely important for brazilian broiler chicken industry because the amounts of consumed nutrients and environmental temperature have great effects on bird performance and carcass quality. Among diet nutrients, protein has the highest heat increment; thus, during many years, diets with low protein level were recommended in order to reduce heat production in broiler chickens under heat stress. However, reports have shown that low-protein diets have negative effects on broiler performance when environmental temperature is high, because during heat stress, low food intake associated to a low diet protein induce amino acid deficiencies. Other studies have shown that broilers fed low-protein diets increase... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Broiler chickens; Crude protein; Heat stress; Heat increment; Heat production. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2004000200001 |
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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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| Registros recuperados: 82 | |
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