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Registros recuperados: 21
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Ammonia emissions in tunnel-ventilated broiler houses Rev. Bras. Ciênc. Avic.
Lima,KAO; Moura,DJ; Carvalho,TMR; Bueno,LGF; Vercellino,RA.
Gas production in broiler houses and their emissions are closely related to the microclimate established inside the house according to air temperature, humidity, and velocity. Therefore, the internal house environment is influenced by building typology and ventilation system. The objective of the present study was to evaluate ammonia emission rates in broiler houses equipped with different ventilation systems (negative or positive pressure) and litter conditions (new or built-up). The environment of six commercial broiler houses was evaluated internal and external NH3 concentrations. Ventilation rates were recorded to estimate ammonia emission rates. The efficiency of circulation and exhaust fans was assessed, and higher ventilation rates were determined...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Broiler production; Gas emissions; Ventilation systems.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2011000400008
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Broiler mortality and human behavior at work Scientia Agricola
Alencar,Maria do Carmo Baracho de; Nääs,Irenilza de Alencar; Salgado,Douglas D'Alessandro; Gontijo,Leila Amaral.
Brazilian broiler industry adds a significant contribution to country's exports, employing around five million workers in the production chain. The human work involves multiple aspects, including values, beliefs related to work, cultural aspects, personality, motivation etc. The aim of this research was to analyze the associations between broiler accumulated mortality and workers' beliefs related to work, and influences of the supervisors. The study took place in the state of Paraná, Brazil involving 80 broiler integrate farms and 60 workers. A pre-elaborated questionnaire was applied to the workers containing questions related to their health and to some beliefs related to work, as an interview where they could express their feelings. The normal tasks...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Broiler production; Ergonomics; Human work.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000600003
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Climatic Variation: Effects on Stress Levels, Feed Intake, and Bodyweight of Broilers Rev. Bras. Ciênc. Avic.
Osti,R; Bhattarai,D; Zhou,D.
ABSTRACT Chickens tolerate a very narrow range of climatic variation, and therefore, it is essential to determine the most suitable climatic area and weather for broiler production in open-house systems. In this study, 3060 broilers were used as experimental birds to investigate the effects of seasonal differences and climatic variations on the growth performance of broilers reared in an open-house system. Birds were kept under various treatment models that differ in climate Tropic zone, sub tropic zone and temperate zones. Data were recorded during July-August as summer months and January-February as winter months. Collected data was analyzed using the least square procedure given by Harvey-1990. Significantly higher (p<0.05) level of corticosteroids...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Broiler production; Climatic variation; FCR; Open housing system; Stress level.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2017000300489
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Data mining to estimate broiler mortality when exposed to heat wave Scientia Agricola
Vale,Marcos Martinez; Moura,Daniella Jorge de; Nääs,Irenilza de Alencar; Oliveira,Stanley Robson de Medeiros; Rodrigues,Luiz Henrique Antunes.
Heat waves usually result in losses of animal production since they are exposed to thermal stress inducing an increase in mortality and consequent economical losses. Animal science and meteorological databases from the last years contain enough data in the poultry production business to allow the modeling of mortality losses due to heat wave incidence. This research analyzes a database of broiler production associated to climatic data, using data mining techniques such as attribute selection and data classification (decision tree) to model the impact of heat wave incidence on broiler mortality. The temperature and humidity index (THI) was used for screening environmental data. The data mining techniques allowed the development of three comprehensible...
Tipo: Info:eu-repo/semantics/article Palavras-chave: THI; Broiler production; Environmental data.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000300001
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Effect of different substrates on composting of poultry litter R. Bras. Zootec.
Orrico,Ana Carolina Amorim; Centurion,Stanley Ribeiro; Farias,Romildo Marques de; Orrico Junior,Marco Antonio Previdelli; Garcia,Rodrigo Garófallo.
The objective was to evaluate the differences between distinct types of litter material and their combinations in the dynamics of degradation on the organic matter fractions and the quality of the final compound. The treatments were established according to material used as substrate for broiler litter: treatment 1 - rice husks; 2 - sugar cane bagasse; 3 - wood shavings; 4 - wood shavings + sugar cane bagasse; 5 - rice husks + sugar cane bagasse; and 6 - Napier grass. The following variables were monitored: temperature, levels of total solids (TS), volatile solids (VS), mass and volume of the pile, fibrous fraction, and levels and reductions of N, P and K during the process. Piles formed with Napier grass and sugar cane bagasse presented the highest...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Broiler production; Cellulose; Lignin; Temperature; Total solids.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000700028
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Effects of Transportation Distance, Slaughter Age, and Seasonal Factors on Total Losses in Broiler Chickens Rev. Bras. Ciênc. Avic.
Arikan,MS; Akin,AC; Akcay,A; Aral,Y; Sariozkan,S; Cevrimli,MB; Polat,M.
ABSTRACT This study aimed at determining the total losses associated with the season, transportation distance, and slaughter age during the transportation of broilers from poultry farms to slaughterhouses in Turkey. All data and parameters were statistically analyzed and the change in total loss during transportation was evaluated by two-way analysis of variance to determine which factors or variables affect this change. Total transportation losses were compared among the four seasons of the year, two slaughter ages (younger broiler, 31-39 days of age; older broilers 40-46 days of age) and three distance ranges (short, ≤50 km; medium, 51-150 km; and long, ≥151 km). Total losses of 259.40 g, 307.35 g, and 350.14 g were determined for short, medium and long...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Transportation; Broiler production; Slaughter age; Season; Weight losses.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2017000300421
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Energy analysis and greenhouse gas emission in broiler farms: A case study in Alborz province, Iran CIGR Journal
Omid, Mahmoud; Khanali, Majid; Zand, Sajad.
The goal of this study was to examine the energy flows for poultry breeding in broiler production farms in Alborz province of Iran. Data were obtained randomly from 30 poultry production farms using a face to face questionnaire method. The results indicated that the total input energy was 189805.48 MJ per 1000 birds, while the output energy was 28151.17 MJ/(1000 bird). Net energy was negative, -161654.31 MJ/(1000 bird), implying that energy had been lost. Energy use efficiency was calculated as 0.15, showing the inefficient use of energy in the broiler production farms. The fuel energy (energy content of the fuel) with a share of 58.35% had the highest share of input energy and the feed energy by 29.71% was the next. Greenhouse gas (GHG) emission of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Broiler production; Energy consumption; Environmental analysis; GHG emission; Marginal physical productivity.
Ano: 2018 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4157
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Equilibrium Condition during Locomotion and Gait in Broiler Chickens Rev. Bras. Ciênc. Avic.
Alves,MCF; Almeida Paz,ICL; Nääs,IA; Garcia,RG; Caldara,FR; Baldo,GAA; Nascimento,GR; Amadori,MS; Felix,GA; Garcia,EA; Molino,AR.
ABSTRACT The experiment was carried out with the objective of evaluating a methodology to estimate the angulation and equilibrium condition, relating them to gait score and the main diseases of the locomotion system in males and females of commercial broiler strains. A completely randomized experimental design in a factorial arrangement (2x2) was applied, consisting of two sexes and two genetic strains, with five replicates of 53 chickens each. The following characteristics related to broiler locomotion were studied: gait score (GS); incidence of Valgus (VAL) and Varus (VAR) deformities and of pododermatitis (POD); body angle relative the ground (ANG); equilibrium condition (EC); body weight (BW) and breast weight (BrW); and incidence of femoral...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Angulation; Bone pathologies; Broiler production; Locomotion problems; Posture; Welfare.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000300419
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Evaluation of a radiographic method to detect tibial dyschondroplasia lesions in broilers Rev. Bras. Ciênc. Avic.
Pelicia,K; Aparecido Jr,IM; Garcia,EA; Molino,AB; Santos,GC; Berto,DA; Vieira Filho,JA; Murakami,ESM; Montenegro,AT; Silva,AM.
This study aimed at developing radiographic techniques for the early detection of dyschondroplastic lesions in the tibia of broilers. The experiment was carried out at the facilities of UNIFOR/MG and Formiga and UNIFENAS/ Alfenas with 420 one-day-old male Cobb broilers. At 20 days of age, all birds were radiographed and identified with an alpha-numeric metal ring in the right leg. At 40 days of age, 42 broilers previously selected as a function of bone mineral density and lesion thickness scores were again radiographed and scored, and then sacrificed. Their right tibia was removed for gross and histological examination of the growth plate. The results showed that radiographic techniques are correlated with gross and histological examination and that there...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Broiler production; Histology; Gross examination; Radio-diagnosis; Tibia.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2012000200007
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Factors Affecting the Decision to Adopt and Continue Best Management Practices by Broiler Producers AgEcon
Paudel, Krishna P.; Devkota, Nirmala.
We analyzed survey data collected from broiler producers in Louisiana to understand the factors affecting the longevity of best management practices adoption. Results indicated variables such as future expansion potential and the length of time the farm have been with the family decreases the chance of adopting best management practices. Our results support the idea that education and income would have positive results on the entry decision to adopt best management practices.
Tipo: Conference Paper or Presentation Palavras-chave: Adoption; Best management practices; Broiler production; Entry; Exit; Farm Management; Livestock Production/Industries.
Ano: 2007 URL: http://purl.umn.edu/9851
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Factors that Influence the Production, Environment, and Welfare of Broiler Chicken: A Systematic Review Rev. Bras. Ciênc. Avic.
Baracho,MS; Nääs,IA; Betin,PS; Moura,DJ.
ABSTRACT The objective of the present study was to characterize the scientific production regarding the factors that influence broiler chicken production, and that were published from 2000 to 2015 in journals indexed in the database of Google Scholar, Scielo, and ScienceDirect. The research was done in the Thermal Comfort Laboratory at FEAGRI- UNICAMP, and the concept of the systematic review was applied. The research criterion was initially defined (the keywords) aiming to identify and evaluate the variables that describe the experimental characteristics and the animals. The primary keywords identified were: broiler chicken from commercial strains, broiler production, rearing conditions, thermal environment, air quality, acoustic environment, light...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Broiler production; Intensive rearing; Poultry housing.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000300617
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Identification of acoustic parameters for broiler welfare estimate REA
Pereira,Erica M.; Nääs,Irenilza de A.; Garcia,Rodrigo G..
Estimates of broiler welfare have subjective character. Nowadays, researchers seek non-invasive features or indicators that may describe this condition in animal production. The aim of this study was to identify acoustic parameters to estimate broiler welfare using the following five vocalization acoustic parameters: energy, spectral centroid, bandwidth, first formant, and second formant. The database that generated the model was obtained from a field experiment with 432 broilers, which half were Cobb® and half, Ross® breed, from day 21 to 42, containing bird vocalizations under either welfare or stress conditions. The results of the experiment generated responses to the tested conditions of gender, genetic strain, and welfare. The proposed model was based...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Signal analysis; Broiler production; Algorithm.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000300004
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Inclusion of sunflower meal, with or without enzyme supplementation, in broiler diets Rev. Bras. Ciênc. Avic.
Tavernari,FC; Albino,LFT; Morata,RL; Dutra Júnior,WM; Rostagno,HS; Viana,MTS.
Two experiments were carried out to evaluate the effects of the dietary inclusion of different dietary sunflower meal (SFM) levels (0% and 20%), with or without the supplementation of an enzyme complex (EC) (cellulase, β-glucanase, xylanase, and phytase) on broiler performance, carcass and cuts yields, economics, and dietary AMEn values. A randomized block experimental design, with a 2x2 factorial arrangement of eight replicates of 20 birds each, was used to test performance. A completely randomized experimental design with a 2x2 factorial arrangement of eight replicates of four birds each was used to test metabolism. No interaction effects between SFM and EC were observed on performance. Although SFM significantly reduced feed intake in the starter phase...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Alternative feedstuffs; Broiler production; Enzyme complex.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2008000400007
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Influence of genetic strain and season on back scratch lesions in broilers Rev. Bras. Ciênc. Avic.
Pilecco,M; Almeida Paz,IC de L; Tabaldi,LA; Nääs,I de A; Garcia,RG; Caldara,FR; Alves,MCF; Felix,GA.
This study aimed at evaluating the influence of genetic strain, sex, and season on the incidence of back scratches during the rearing period. Male and female broilers of two genetic strains reared during the hot or cold season were evaluated. This meta-analysis included 894 samplings in 351 broiler houses of contracted farms located in the state of Mato Grosso do Sul, Brazil, in 2010. Broilers of all ages (1 to 43 days) were sampled, capturing 2% of the birds in the house at each sampling. Each flock was evaluated twice, in 21-day intervals. Broilers were reared as single-sex flocks; there were no straight-run flocks. Scratch lesions were classified as present or absent. Strain A broilers presented lower scratch rates (p < 0.05) than strain B birds....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Broiler production; Carcass quality; Management.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2011000400004
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Noise analysis to evaluate chick thermal comfort Scientia Agricola
Moura,Daniella Jorge de; Nääs,Irenilza de Alencar; Alves,Elaine Cangussu de Souza; Carvalho,Thayla Morandi Ridolfi de; Vale,Marcos Martinez do; Lima,Karla Andrea Oliveira de.
The relationship between thermal environment and chick performance has widely been evaluated, however the consideration that the assessment of the comfort may be estimated by interpreting both amplitude and frequency of bird vocalization under tropical housing conditions is a new concept. This research had as objective of estimating thermal comfort for chicks during the heating phase using this new concept. An experiment was carried out inside a climate controlled chamber (A) for establishing the behavioral pattern related to environmental temperature limits. Forty five chicks were reared inside a 2.3 m² box. A video camera was placed 2.0 m above the birds and the images were captured and registered in a computer. From the pattern determined in the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Broiler production; Analysis of signals; Thermal environment; Behavior.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000400018
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Selecting the most adequate bedding material for broiler production in Brazil Rev. Bras. Ciênc. Avic.
Garcia,RG; Almeida Paz,ICL; Caldara,FR; Nääs,IA; Pereira,DF; Ferreira,VMOS.
Broiler chicken production is widely dispersed across the globe, and one important issue for growers is the selection of adequate bedding material, as the availability and price of substrates varies among countries and regions within a same country. This study aimed at applying a multiple criteria analysis approach for the selection of the most appropriate bedding material for broiler production. Based on field research data and growers' experience, the most desirable characteristics of a litter material were chosen as the main criteria. The selected materials were wood shavings, rice husks, chopped Napier grass (Pennisetum pupureum), 50% sugar cane bagasse (Saccharum L.) plus 50% wood shavings, 50% sugar cane bagasse (Saccharum L.) plus 50% rice husks,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Alternative bedding material; Broiler production; Multiple criteria analysis; AHP.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2012000200006
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Spatial analysis of stress conditions inside broiler house under tunnel ventilation Scientia Agricola
Miragliotta,Miwa Yamamoto; Nääs,Irenilza de Alencar; Manzione,Rodrigo Lilla; Nascimento,Fernando Ferraz do.
Broiler building typology associated with the local characteristics (climate, topography and surrounding vegetation) and handling systems (stocking density, curtains, equipment and nutrition) influence the inside environment. A spatial distribution analysis of these conditions may indicate stress zones in the house. The aim of this research was to apply spatial analysis of thermal, aerial and acoustic environmental conditions inside a tunnel ventilated broiler housing, with a stocking density of 18 birds m-2. This study was carried out in Rio Claro, SP, Brazil, in a 12 m × 115 m house divided into three equal sections (East, center and West), East-West oriented, and virtually divided on 132 cells, each one measuring 3.0 m × 3.5 m. At the geometric center...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Broiler production; Environment; Geostatistics; Heat stress; Spatial distribution.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000500002
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Surface temperature distribution in broiler houses Rev. Bras. Ciênc. Avic.
Baracho,MS; Nääs,IA; Nascimento,GR; Cassiano,JA; Oliveira,KR.
In the Brazilian meat production scenario broiler production is the most dynamic segment. Despite of the knowledge generated in the poultry production chain, there are still important gaps on Brazilian rearing conditions as housing is different from other countries. This research study aimed at analyzing the variation in bird skin surface as function of heat distribution inside broiler houses. A broiler house was virtually divided into nine sectors and measurements were made during the first four weeks of the grow-out in a commercial broiler farm in the region of Rio Claro, São Paulo, Brazil. Rearing ambient temperature and relative humidity, as well as light intensity and air velocity, were recorded in the geometric center of each virtual sector to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Broiler production; Housing; Infrared thermography.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2011000300003
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Technical Performance and Cost Analysis of Broiler Production in Turkey Rev. Bras. Ciênc. Avic.
Tandoğan,M; Çiçek,H.
Abstract In this study, the live performance and costs of broiler production was examined and cost analysis were assessed in the Balıkesir, Bolu and Sakarya Provinces, which are the most important broiler-producing regions of Turkey. Annual (years 2012-2013) production data of 125 broiler farms were analyzed. Farms were scaled according to the irrearing capacities as small (1-10,000 broilers), medium (10,001-30,000) and large (30,001 and above). Cost and performance differences among farm scales and research centers were tested by one-way analysis of variance. Average live weight (LW), livability (LA), slaughter age (SA), feed conversion ratio (FCR), and production efficiency factor (PEF) values were calculated as 2.436 ± 0.006 kg; 93.502 ± 0.133%; 42.293...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Broiler production; Cost analysis; Technical performance; Turkey.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000100169
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Training of catching teams and reduction of back scratches in broilers Rev. Bras. Ciênc. Avic.
Pilecco,M; Almeida Paz,ICL; Tabaldi,LA; Nääs,IA; Garcia,RG; Caldara,FR; Francisco,NS.
This study evaluated the efficacy of training of catching teams and reduction of back scratches in broilers. The study was carried out in a large broiler company between January and October of 2010, in the region of Dourados, Brazil. During that period, 80 samplings were performed in 80 broiler houses in the micro-regions covered by the company. When broilers were 43 days old, when 5% of the birds in each house were evaluated immediately after catching, when birds were already inside the plastic crates, ready to be transported to the processing plant. Out of a total number of 1,177,600 total, 58,880 broilers were evaluated. Four catching teams (A, B, C, and D), with 24 people each, were trained for four consecutive weeks. By the end of the training course,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Processing; Catching; Broiler production; Carcass downgrading.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000300017
Registros recuperados: 21
Primeira ... 12 ... Última
 

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