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| Registros recuperados: 14 | |
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| Nascimento,GR; Nääs,IA; Pereira,DF; Baracho,MS; Garcia,R. |
| This study was conducted to determine the effect of the air temperature variation on the mean surface temperature (MST) of 7- to 35-day-old broiler chickens using infrared thermometry to estimate MST, and to study surface temperature variation of the wings, head, legs, back and comb as affected by air temperature and broiler age. One hundred Cobb® broilers were used in the experiment. Starting on day 7, 10 birds were weekly selected at random, housed in an environmental chamber and reared under three distinct temperatures (18, 25 and 32 ºC) to record their thermal profile using an infrared thermal camera. The recorded images were processed to estimate MST by selecting the whole area of the bird within the picture and comparing it with the values obtained... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Image analysis; Poultry; Thermal comfort. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2011000400007 |
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| Baracho,MS; Nääs,IA; Bueno,LGF; Nascimento,GR; Moura,DJ. |
| Morphological asymmetry has been described as a potential broiler welfare indicator, for interpreting the birds' ability to cope with the challenges that may affect its growth. The objective of this study was to evaluate the use of morphological asymmetry data to estimate broiler walking ability and welfare.dBroilers werefed diets supplemented or not with vitamin D. Toes were measured when birds were 42 and 49 days old using digital caliper.the left and right sides of the following four bilateral traits (tarsometatarsus length, outer toe length, mid toe length, and back toe length) were measured twice on intact alive birds by two different researcherh. Data from right and left sides were compared in the two treatments using the Student t-test, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Asymmetry; Welfare; Poultry. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2012000300009 |
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| Gigli,ACS; Baracho,MS; Nääs,IA; Silva,RA; Zago,R; Dall'Anese,FP. |
| Intensive broiler production in tropical climates requires adequate air circulation to control heat stress. Excess of air speed may lead to dust production and reduction of air quality and, consequently, production parameters. Brazilian regulations prohibit the presence of pathogens that may deteriorate air quality, and the presence of fungi in the air inside the poultry houses is limited to 750CFU/m³. The aim of this study was to evaluate the presence of fungi in two distinct types of broiler houses. The research compared two types of air ventilation: conventional (G1) and positive tunnel ventilation (G2). The fungi were collected using a dust sampling pump, with the air flow calibrated to 1.5 L/min. The filter impregnated with dust was submitted to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Environment; Fungi; Poultry housing. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2005000400002 |
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| Jacob,FG; Salgado,DA; Nää,IA; Baracho,MS. |
| ABSTRACT The present study had the objective of analysing the impact of the use of environmental enrichment (music and light stimuli), broiler sex, and age in broiler chickens’ weight during growth. The observational study was carried out on a commercial farm. The environmental enrichment consisted of broilers’ stimulation by sound and light, and a house was kept without stimulus (control). The music stimuli consisted of different music styles and was played during the experiment to promote motivation for the birds. The light stimuli came from a coloured (red and green) LED strobe projector. Both stimuli were applied once a day for about 6 minutes, for five weeks. The broilers were weighed at the end of each week of growth. Throughout the growth period,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Broiler production broiler welfare; Music; Light. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2020000200303 |
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| Nääs,IA; Gigli,ACS; Baracho,MS; Almeida Paz,ICL; Salgado,DD. |
| Hatching results are directly related to environmental and biological surroundings. This research study aimed at evaluating the influence of incubation environmental conditions on hatchability and one-day-old chickling quality of five production flocks using multivariable analysis tool. The experiment was carried out in a commercial hatchery located in the state of São Paulo, Brazil. Environmental variables such as dry bulb temperature, relative humidity, carbon dioxide concentration, and number of colony forming units of fungi were recorded inside a broiler multi-stage setter, a hatcher after eggs transference, and a chick-processing room. The homogeneity of parameter distribution among quadrants inside the setter, the hatcher, and the chick room was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Broiler chick; Chick quality; Hatchability; Hatchery; Incubation conditions. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2008000400004 |
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| Baracho,MS; Nääs,IA; Lima,NDS; Cordeiro,AFS; Moura,DJ. |
| ABSTRACT The meta-analysis data were obtained from a survey of published articles over 15 years. The data were selected to classify the factors that impact broiler production and separated by influence aspects of animal production (thermal environment and other factors). The relevant data for each study were systematized, grouped and later tabulated and inserted into a database prepared in a spreadsheet. The variables used to analyze the thermal environment were temperature (comfort, high and low) and performance data (weight gain, feed intake, and feed conversion). The variables used for other features were ventilation (TER = tunnel + evaporative cooling, PP = positive pressure, NV = natural ventilation) and performance (feed conversion, live weight,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Poultry production; Animal production; Broiler genetic strain; Rearing environment.. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000300318 |
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| 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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| Menezes,AG; Nääs,IA; Baracho,MS. |
| This paper describes an exploratory study carried out to determine critical control points and possible risks in hatcheries and broiler farms. The study was based in the identification of the potential hazards existing in broiler production, from the hatchery to the broiler farm, identifying critical control points and defining critical limits. The following rooms were analyzed in the hatchery: egg cold storage, pre-heating, incubator, and hatcher rooms. Two broiler houses were studied in two different farms. The following data were collected in the hatchery and broiler houses: temperature (ºC) and relative humidity (%), air velocity (m s-1), ammonia levels, and light intensity (lx). In the broiler house study, a questionnaire using information of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Broilers; Hatchery; Quality control. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2010000100003 |
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| Jacob,FG; Baracho,MS; Nääs,IA; Salgado,DA; Souza,R. |
| ABSTRACT Housing environment is essential to achieve good broiler performance and to prevent diseases, including footpad dermatitis (FPD). The objective of this study was to determine the incidence of footpad dermatitis in broilers chickens according to housing type. The study was carried out with broilers reared for 5, 12, 19, 29 and 40 days. Four houses were used in this observational study. House 1 (A1) had positive pressure and reused litter; house 2 (A2) had positive pressure and new litter (sawdust); house 3 (A3) had positive pressure and new litter (rice husks); and house 4 (A4) had negative pressure and reused litter. During the entire experiment, air environmental and litter surface temperatures, and litter compaction were recorded. Pododermatitis... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Footpad dermatitis; Surface litter temperature; Poultry litter. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000200247 |
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| Nääs,IA; Sonoda,LT; Romanini,CEB; Morello,GM; Neves,HAF; Baracho,MS; Souza,SRLS; Menezes,AG; Mollo Neto,M; Moura,DJ; Almeida Paz,ICL. |
| Health status, feed conversion ratio, and mortality are long known broiler chicken production indicators. However, further parameters are required by today's demanding meat markets, as these indicators are not sufficiently accurate to determine flock overall welfare. Morphological asymmetry has been pointed as an alternative welfare indicator as it reflects the ability of the bird to cope with the challenges that rearing conditions may impose. This study aimed at evaluating the possibility of using morphological asymmetry as a welfare indicator. Broilers from 28 to 42 days of age were used in the trial. Birds were randomly selected in a commercial poultry farm and transported to the laboratory. They walked over the force measurement platform in order to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal welfare assessment; Broiler feet force; Broiler leg abnormalities; Welfare indicator. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2008000400003 |
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| Nääs,IA; Miragliotta,MY; Baracho,MS. |
| O setor econômico de produção de matrizes pesadas emprega um grande número de pessoas que permanecem cerca de 44 horas semanais dentro tanto das granjas de recria e produção, como nas salas adjacentes à câmara incubatória. O trabalho levantou os dados de níveis de ruídos em um sistema de produção de matrizes pesadas e de ovos férteis, nos galpões de recria do tipo Dark House, e produção de ovos nas salas de vacinação de pintinhos e de acondicionamento de ovos férteis, em dois dias consecutivos, por um período de 8 horas, durante as horas em que os trabalhadores se encontravam dentro dos locais. Os registros de nível de ruídos foram efetuados utilizando-se um equipamento nível sonoro marca Lutron SL 4001. Foram coletados os dados médios de nível normal e de... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nível de ruído; Incubatório; Galpões; Aviário; Recria; Produção. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2001000200003 |
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| Jacob,FG; Baracho,MS; Nääs,IA; Lima,NSD; Salgado,DD; Souza,R. |
| ABSTRACT The most common lesions observed in commercial broiler farms are hock burns and pododermatitis, defined as necrotic lesions on the plantar surface of the footpads and in the hock of growing broilers, causing pain and compromising broiler welfare. The present study aimed at identifying the risks of hock burns and pododermatitis in broilers reared under commercial conditions on new or reused litter. Twenty-four 40-d-old broilers reared in two houses in a commercial broiler farm. The plantar surface of the footpads and the hocks of broiler were recorded using infrared thermal images. The incidence of hock burns in broilers reared on new litter was 0.72 times lower than those on reused litter. Broilers reared on new litter presented lower risk (0.75,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Feet lesion; Litter; Poultry production. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000300357 |
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| 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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| Baracho,MS; Camargo,GA; Lima,AMC; Mentem,JF; Moura,DJ; Moreira,J; Nääs,IA. |
| Poultry meat quality has been widely studied, and has become a growing demand of the international market. Parameters that affect meat quality are complex, and occur throughout the production chain. The constant concern with meat quality by the exporting sectors is a response to consumers' demands, and is achieved by increasing efficiency, and investments in personnel training on quality. Understanding where critical points are in the poultry meat production chain, and investing in solving critical problems may lead to better control and management, and consequent reduction of losses. Production and management practices, from farm to processing plant, play an important role in meat quality, and the use of technologies to reduce risk factors throughout the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Meat hygiene; Meat quality; Pre-processing; Production chain. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2006000400001 |
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| Registros recuperados: 14 | |
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