Consulta: subjectFacets:"Environmental temperature"
Registros recuperados: 12
Data/hora: 10/06/2024 11:00:28

Análisis químico del extracto celular de peciolo en fresa mediante laboratorios portátiles.
Provedor de dados: 32
Autores: Janeiro Cid, Ricardo.
El objetivo de la presente investigación fue establecer  métodos de diagnóstico rápidos y confiables para el análisis químico del extracto celular de pecíolo en fresa mediante el uso de equipos portátiles. Se realizaron tres ensayos a nivel de invernadero, laboratorio y campo. Primero, con la finalidad de estandarizar el muestreo del extracto celular de peciolo en fresa se realizó un experimento en invernadero donde se tomó en cuenta la concentración de nitratos en el extracto celular de pecíolo (ECP) y su relación con la temperatura, luminosidad y humedad de suelo. Estas variables fueron medidas con un ionómetro portátil marca Horiba®, un termómetro, luxómetro y medidor de humedad marca Vernier®, respectivamente. Los resultados indicaron que la...
Palavras-chave: Edafología; Maestría; Temperatura del ambiente; Luminosidad; Humedad de la hoja; Environmental temperature; Luminosity; Leaf wetness; Espectrofotometría; Potenciometría; ICP-AES; Spectrophotometry; Potentiometry.
Ano: 2014
URL: http://hdl.handle.net/10521/2315

Dynamic epimarks in sex-related genes predict gonad phenotype in the European sea bass, a fish with mixed genetic and environmental sex determination
Provedor de dados: 5
Autores: Anastasiadi, Dafni; Vandeputte, Marc; Sanchez-baizan, Nuria; Allal, Francois; Piferrer, Francesc.
The integration of genomic and environmental influences into methylation patterns to bring about a phenotype is of central interest in developmental epigenetics, but many details are still unclear. The sex ratios of the species used here, the European sea bass, are determined by genetic and temperature influences. We created four families from parents known to produce offspring with different sex ratios, exposed larvae to masculinizing temperatures and examined, in juvenile gonads, the DNA methylation of seven genes related to sexual development by a targeted sequencing approach. The genes most affected by both genetics and environment were cyp19a1a and dmrt1, with contrasting sex-specific methylation and temperature responses. The relationship between...
Tipo: Text
Palavras-chave: Early development; Environmental temperature; DNA methylation; Sex determination; Aromatase; Cyp19a1a; Dmrt1; Epigenetic marks; DNA methylation threshold; Epigenetic inheritance.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00470/58123/61657.pdf

Effect of Environmental Temperature During the First Week of Brooding Period on Broiler Chick Body Weight, Viscera and Bone Development
Provedor de dados: 89
Autores: Moraes,VMB; Malheiros,RD; Furlan,RL; Bruno,LDG; Malheiros,EB; Macari,M.
The objective of the present study was to assess the development of broiler chicks during the first week post-hatching when reared at three different environmental temperatures. A total of 480 day-old chicks were placed in three environmentally controlled rooms (20, 25 and 35°C) from 1 to 7 days of age. Body weight gain, feed and water intake, as well as liver, gizzard, heart, yolk sac and bursa of Fabricius weights were measured daily. Tibia and femur bones were weighed and their length and width (medial diameter) were also obtained. The chicks reared at 20º C had lower weight gain and ingested less food than chicks reared at 25°C and less water than chicks kept at 35°C. Relative weights of the liver, heart, and gizzard were affected by environmental...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Body weight; Bone growth; Chicks; Environmental temperature; Viscera.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2002000100003

The Effect of Cyclic Heat Stress Applied to Different Broiler Chicken Brooding Stages on Animal Performance and Carcass Yield
Provedor de dados: 89
Autores: Marchini,CFP; Fernandes,EA; Nascimento,MRBM; Araújo,EG; Guimarães,EC; Bueno,JPR; Fagundes,NS; Café,MB.
ABSTRACT The objective of this study was to evaluate the performance and carcass yield of broilers submitted to heat stress during different rearing stages. A total of 840 one-day-old CobbAvian48TM male broilers were housed in an experimental house equipped with conventional ventilation system and foggers. Birds were distributed according to a completely randomized design into four treatments, with six replicates of 35 birds each. The treatments consisted of: T1 (control) - birds reared under natural temperature and relative humidity conditions from 1 to 42 days of age; T2 - birds submitted to heat stress (HS) from 16 to 21 days of age; T3 - birds submitted to HS from 22 to 42 days of age; and T4 - birds submitted to HS from 16 to 42 days of age. Birds...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Air humidity; Carcass traits; Environmental temperature; Poultry; Thermal stress.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000400765

Response surface models to predict broiler performance and applications for economic analysis
Provedor de dados: 89
Autores: Faria Filho,DE; Rosa,PS; Torres,KAA; Macari,M; Furlan,RL.
A study was carried out to elaborate response surface models using broiler performance data recovered from literature in order to predict performance and elaborate economic analyses. Nineteen studies published between 1995 and 2005 were retrieved using the systematic literature review method. Weight gain and feed conversion data were collected from eight studies that fulfilled the pre-established inclusion criteria, and a response surface model was adjusted using crude protein, environmental temperature, and age as independent variables. The models produced for weight gain (r² = 0.93) and feed conversion (r² = 0.85) were accurate, precise, and not biased. Protein levels, environmental temperature and age showed linear and quadratic effects on weight gain...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crude protein; Environmental temperature; Regression analysis; Response surface; Slaughter age; Systematic literature review.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2008000200009

Effects of the Addition of Pure Glycerin Supplementation in the Drinking Water on the Performance of Broilers Submitted to Heat Stress and Feed Restriction
Provedor de dados: 89
Autores: Moraes,PO; Ceron,MS; Borille,R; Gianluppi,RDF; Lovato,GD; Cardinal,KM; Ribeiro,AML.
ABSTRACT The experiment was conducted to study the effect of pure glycerin supplementation (GLYC) in the drinking water of broilers subjected to heat stress and feed restriction. Water with 0, 1, or 2% glycerin was provided ad libitum to broilers in six hours of feed restriction. The birds were housed in two environments: thermoneutral (TN) - 25 ° C, and cyclic heat stress (HS) - 12h with 250C, 6h with 320C, 3h of 250 to 320C and 3h of 320 to 250C. The experimental design was randomized in a factorial arrangement of 2 x 3 + 2, with three GLYC levels, two environments and one control group with ad libitum feeding each environment. When submitted to HS, broiler receiving 2% glycerin presented higher weight gain (WG), water consumption (WC), feed intake (FI)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Environmental temperature; Feed restriction; Glycerol; Performance; Water consumption.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000300413

Protein levels and environmental temperature effects on carcass characteristics, performance, and nitrogen excretion of broiler chickens from 7 to 21 days of age
Provedor de dados: 89
Autores: Faria Filho,DE; Rosa,PS; Vieira,BS; Macari,M; Furlan,RL.
This trial was conducted to evaluate the utilization of low-protein diets formulated based on the ideal protein concept for broiler chickens from 7 to 21 days of age reared at different environmental temperatures. Nine hundred male Cobb-500® chickens were used. At day seven chicks were distributed according to a completely randomized design in a 3 x 3 factorial with four replications of 25 birds each. It was used three crude protein levels in the diet (21.5; 20.0 and 18.5%) and three environmental temperatures (low, thermoneutral and high). The performance, carcass characteristics (yield and chemical composition), and nitrogen ingestion and excretion were assessed. There was no significant interaction among the factors for the evaluated variables....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broiler Chicks; Environmental temperature; Ideal protein; Nitrogen excretion; Performance.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2005000400009

Performance and egg quality of Japanese quails submitted to cyclic heat stress
Provedor de dados: 89
Autores: Vercese,F; Garcia,EA; Sartori,JR; Silva,A de P; Faitarone,ABG; Berto,DA; Molino,A de B; Pelícia,K.
Aiming at evaluating the influence of cyclic temperatures on the performance and egg quality of Japanese quails an experiment was carried out with 480 birds after egg production peak. Birds were housed in a bioclimatic chamber with automatic temperature control that contained two rooms, one maintained at thermoneutral temperature (21 ºC) and the other adjusted for the tested cyclic temperatures (24, 27, 30, 33 and 36 ºC at a time). Each room had a battery of five floors and ten cages, with a capacity of 24 birds per cage, totaling 240 birds per battery. Birds were fed iso-nutritious and iso-caloric diets. Data obtained under the tested cyclic temperatures were compared with those obtained under thermoneutral temperature. At the end of each experimental...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coturnix coturnix japonica; Egg production; Environmental temperature; Heat stress; Post-peak egg production.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2012000100007

Crude protein and metabolizable energy levels for layers reared in hot climates
Provedor de dados: 89
Autores: Almeida,VR; Dias,AN; Bueno,CFD; Couto,FAP; Rodrigues,PA; Nogueira,WCL; Faria Filho,DE.
The objective of the present study was to evaluate the effects of different dietary crude protein (CP) and metabolizable energy (ME) levels on the performance, internal and external egg quality, and cloacal temperature of commercial layers reared in hot climate. In this trial, 100 commercial Hy-Line W-36 layers between 20 and 32 weeks of age were distributed according to a completely randomized experimental design with a 2 x 2 factorial arrangement, consisting of two CP levels (15 e 18%) and two ME contents (2700 and 3100 kcal/kg) with five replicates per treatment and 10 birds per replicate. Performance (feed intake, egg production, egg mass, and feed conversion ratio), internal (Haugh units and albumen and yolk percentage) and external (eggshell % and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Thermal homeostasis; Nutrition; Environmental temperature; Cloacal temperature.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2012000300007

GLUTAMIC ACID IMPROVES BODY WEIGHT GAIN AND INTESTINAL MORPHOLOGY OF BROILER CHICKENS SUBMITTED TO HEAT STRESS
Provedor de dados: 89
Autores: Porto,ML; Givisiez,PEN; Saraiva,EP; Costa,FGP; Moreira Filho,ALB; Andrade,MFS; Brandão,PA; Guerra,RR.
ABSTRACTThe objective of this study was to evaluate the effects of 1% dietary glutamic acid on the body weight, intestinal morphometry, and anti-Newcastle antibody titers of broiler chickens submitted to heat stress. One-d-old male broiler chicks (n=120) were distributed according to a 2 x 2 factorial design with two environmental temperatures (thermoneutral or heat stress) and two diets (with 0 or 1% glutamic acid). Heat stress temperature was constantly maintained (24h/day) 5 ºC higher than the thermoneutral temperature. Diets supplied the nutritional requirements of broilers in the pre-starter (1 to 7d) and starter (8 to 21d) phases. Birds were vaccinated against Newcastle disease on d 7 via eye drop. On days 5, 10, 15, and 20, individual body weight...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amino acid; Duodenum morphology; Environmental temperature; Humoral immunity; Heat stress; Performance.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015000300355

Impact of global warming on beef cattle production cost in Brazil
Provedor de dados: 63
Autores: Nääs,Irenilza de Alencar; Romanini,Carlos Eduardo Bites; Salgado,Douglas D'Alessandro; Lima,Karla Andrea Oliveira; Vale,Marcos Martinez do; Labigalini,Marcelo Ricardo; Souza,Silvia Regina Lucas de; Menezes,Adriana Gomes; Moura,Daniella Jorge de.
Global warming is affecting agribusiness in its economic aspects. Therefore, the prediction of the evolution of Brazilian beef cattle production cost was made using the IPCC forecast scenario for global warming. The methodology consisted of two steps: (i) the development of a fuzzy model that estimated the grazing land capacity (RP) decrease risk as a function of the changes in the average total rain index, air temperature and increase in extension of the dry season; and (ii) the design of an algorithm for predicting the decrease in production as function of the RPfuzzy model, that results in the impact in beef cattle productivity, and consequent increase in production costs. Historical environmental data from important producing counties in the Cerrado...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dry season; Environmental temperature; Fuzzy simulation; Mathematical modeling.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000100001

COMPOSITION, TROPHIC STRUCTURE AND ACTIVITY PATTERNS OF THE UNDERSTORY BATS OF THE BITACO FOREST RESERVE
Provedor de dados: 37
Autores: FERRO MUÑOZ,Natalia; GIRALDO,Alan; MURILLO GARCÍA,Oscar Enrique.
ABSTRACT The present study describes composition and trophic structure, and assesses the effect of environmental temperature and rainfall on the pattern of nocturnal activity of understory bats in an Andean forest, in the first half of the night. Seven sampling events were conducted, lasting six nights each one. Ten mist nets were used to capture bats, which were checked every hour between 18:00 and 00:00 hours. Bat species, sex and capture time were registered. In addition, environmental temperature and rainfall were also recorded during sampling. The bat assemblage of the understory of the study area was represented mostly by frugivore species, within this guild there was a lower richness of nomadic than sedentary species. For the first half of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Environmental temperature; Precipitation; Trophic levels.
Ano: 2018
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2018000200170