Consulta: creatorFacets:"Nääs,IA"
Registros recuperados: 51
Data/hora: 13/06/2024 05:27:51

The Addition of Hatchery Liquid Waste to Dairy Manure Improves Anaerobic Digestion
Provedor de dados: 89
Autores: Lopes,WRT; Orrico,ACA; Garcia,RG; Orrico Jr,MAP; Manarelli,DM; Fava,AF; Nääs,IA.
ABSTRACT The objective of this study was to determine the optimal inclusion level of liquid egg hatchery waste for the anaerobic co-digestion of dairy cattle manure. A completely randomized experimental was applied, with seven treatments (liquid hatchery waste to cattle manure ratios of0: 100, 5:95, 10:90, 15:85, 20:80, 25:75 and 30:70), with five replicates (batch digester model) each. The evaluated variables were disappearance of total solids (TS), volatile solids (VS), and neutral detergent fiber (NDF), and specific production of biogas and of methane. Maximum TS and VS disappearance of 41.3% and 49.6%, were obtained at 15.5% and 16.0% liquid hatchery waste inclusion levels. The addition of 22.3% liquid hatchery considerably reduced NDF substrate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Poultry production; Biogas; Methane; Total solids; Volatile solids.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000600065

BONE CHARACTERISTICS OF BROILERS SUPPLEMENTED WITH VITAMIN D
Provedor de dados: 89
Autores: Colet,S; Garcia,RG; Almeida Paz,ICL; Caldara,FR; Borille,R; Royer,AFB; Nääs,IA; Sgavioli,S.
ABSTRACTVitamin D is added to broiler diets to supply its physiological requirement for bone formation. The fast growth rate of modern broilers is often associated with poor bone formation. Increasing vitamin D supplementation levels and the use of more available sources have applied to try to prevent leg problems, to increase carcass yield, and to improve the performance of broilers. The present study evaluated three vitamin D supplementation levels (1) 3,500 IU (control); (2) control + 1,954 IU of 25-hydroxycholecalciferol; and (3) control + 3,500 IU of vitamin D in broiler diets supplied up to 21 days of age. The objective was to investigate if the vitamin D levels above the recommendations could reduce leg problems in broilers. In this experiment, a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gait score; Tibial dyschondroplasia; Valgus; Varus; Pododermatitis.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015000300325

Diagnosis and evaluation of fungi presence in the air of two different ventilation sytems for broiler houses
Provedor de dados: 89
Autores: 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

Estimating the impact of environmental conditions on hatching results using multivariable analysis
Provedor de dados: 89
Autores: 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

Broiler breeder behavior and egg production as function of environmental temperature
Provedor de dados: 89
Autores: Pereira,DF; Nääs,IA; Romanini,CEB; Salgado,DD; Pereira,GOT.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broiler breeder; Heat stress; Behavioral pattern.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2007000100002

Equilibrium Condition during Locomotion and Gait in Broiler Chickens
Provedor de dados: 89
Autores: 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

Assessment of broiler surface temperature variation when exposed to different air temperatures
Provedor de dados: 89
Autores: 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

Surface temperature distribution in broiler houses
Provedor de dados: 89
Autores: 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

Black bone syndrome in chiken meat
Provedor de dados: 89
Autores: Baldo,GAA; Almeida Paz,ICL; Alves,MCF; Nääs,IA; Garcia,RG; Caldara,FR; Gavilan,CWS.
Black bone syndrome (BBS) affects poultry industry, and it is caused by the darkening of the tissue adjacent to the bone due to leak age of bone marrow contents during cooking. The objective of this experiment was to estimate BBS incidence in chicken thighs. A completely randomized experimental design, with two treatments (refrigerated or frozen) of 50 replicates each, was applied. The influence of BBS on meat quality was assessed according to bone lightness (*L), and meat appearance and sensorial characteristics. Lightness was measured using a colorimeter (Minolta® 410R) positioned on the proximal epiphyseal growth plate. Meat quality was evaluated after roasting by assigning scores for appearance (acceptable = no darkening, intermediate = little...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bone darkening; Commercial processing plant; Meat quality.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000400005

Effect of Embryo Thermal Stimulation on the Serum Levels of Immunoglobulins and Corticosterone, and Organ Histopathology of 1 day-old Broilers
Provedor de dados: 89
Autores: Flores,F; Nääs,IA; Garcia,RG; Quinteiro,WMQ; Souza,LI.
ABSTRACT Embryo thermal stimulation has been studied as a means to promote epigenetic changes and to improve broiler health and performance. This study aimed at evaluating immunoglobulin (IgM, IgG, and IgA) titers, serum corticosterone levels, and organ integrity of day-old male Cobb(r) and Ross(r) broilers. Embryos were submitted to hot and cold stimuli (thermal stimulation) on days 14-18 of incubation. The thermal manipulation treatments did not affect immunoglobulin titers of 1 day-old Cobb(r) or Ross(r) chicks, and caused severe bursal lesions (scores 3 and 4) in both strains. However, serum corticosterone levels of Cobb(r) chicks were higher when embryos were submitted to hot stimulus (+1.39ºC) compared with cold stimulus (+36 ºC). Serum...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Corticosterone; Caloric stress; Immunoglobulins; Termmanipulation.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000600071

Do broilers prefer to eat from a certain type of feeder?
Provedor de dados: 89
Autores: Neves,DP; Nääs,IA; Vercellino,R do A; Moura,DJ de.
This study compared three types of feeders for broilers: Fênix, Tube and Automatic feeders. Bird's feeding behavior and preference were considered in this the evaluation. Preference was assessed by examining birds' behavioral activities, such as eating, standing and lying around the equipments, and meal duration as function of the environmental variables. Data on the behavioral activities and meal size were collected in a broiler commercial farm using a portable video camera, and the direct footages were analyzed. The time spent in each activity, feeding bout duration and time spent near the trough were statistically analyzed using the test of means and medians. Pearson's correlation test was used to evaluate the relationship between ambient environmental...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Activity; Broiler behavior; Feeder efficiency; Feeding strategic.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2010000300007

Animal welfare concepts and strategy for poultry production: a review
Provedor de dados: 89
Autores: Moura,DJ; Nääs,IA; Pereira,DF; Silva,RBTR; Camargo,GA.
Well being of animals had been historically a public concern, since the beginning of human kind history. As world's population grows there is a need for food including meat. In the last decades there has been a great improvement in poultry production based on the careful control of several aspects, among which nutrition and management (environment, health and rearing systems). Nowadays, the search for good welfare conditions is a global tendency in animal production; however issues surrounding farm animal welfare or well-being, such as definitions, measurements, interpretation, and perception, continue to be controversial. It is known that the result of a broiler not adequately housed is a direct loss in production which leads towards a thought that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bird welfare; Housing; Behavioral pattern; Welfare assessment.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2006000300001

Effects of labor motivation in poultry production
Provedor de dados: 89
Autores: Alencar,M do CB de; Nääs,IA; Gontijo,LA; Salgado,DA.
Broiler production is a significant economic activity in Brazil, and employs a large number of stockpeople in the integration process. Considering that the stockperson's perception may lead to better performance of his/her tasks and flock handling, this study aimed at verifying possible interactions between poultry productivity and stockperson's perception, emotions, and motivation. The study methodology considered two aspects: qualitative analysis, using Ergonomic Work Analysis, with observational method, and by applying a questionnaire and interview, and classification of the answers into positive relationship and "affection" to the job or negative relationship and "disaffection" to the job; and quantitative analysis, applying the Test of Hypothesis for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ergonomics; Labor motivation; Poultry production.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2007000400007

Evaluation of strain, dietary energy level and stocking density on broiler feathering
Provedor de dados: 89
Autores: Moreira,J; Mendes,AA; Garcia,RG; Garcia,EA; Roça,RO; Nääs,IA; Dalanezi,JA; Pelícia,K.
This study evaluated the effects of strain, stocking density and dietary energy level on the feathering of broiler chickens. Four trials were carried out between September 2000 and April 2002. There were 10,685 broiler chicks from the strains Ross 308, Cobb 500, Hybro PG, Hubbard, MPK, and Isa Vedette. The bids were reared at stocking densities varying between 10 and 16 birds/m² and were given diets containing different metabolizable energy levels. Broiler feathering was evaluated either by atrributing scores from 1 to 10 to feather covering along the thigh and back (visual inspection), or by determining the percentage weight of the feathers at 28 and 42 days of age. Increasing rearing densities resulted in poorer feathering, mainly if 12 or 13 birds/m²...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broiler chickens; Dietary energy; Feathering; Strain; Stocking density.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2006000100002

Multi-Attribute Evaluation and Selection of Broiler House for the Low Prevalence of Footpad Lesion
Provedor de dados: 89
Autores: Garcia,RG; Roriz,BC; Nääs,IA; Lima,NDS; Sgavioli,S; Caldara,FR.
ABSTRACT Intensive broiler production requires large flock density, which compromises litter quality and increases the prevalence of footpad lesions. The present study aimed at comparing the incidence of footpad dermatitis of broilers reared in two different rearing environments. Data from two broiler houses were recorded during 42 d. Air temperature and relative humidity; litter moisture, pH, and temperature; footpad surface temperature; and the incidence of footpad lesions was investigated. Litter quality was analyzed in a 2 x 4 factorial arrangement, with two house types (dark house or open-sided house) and four rearing phases (21, 28, 35, and 42 d of growth), with four replicates per treatment using 12 replicates. Four replicates were used for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Litter quality; Rearing environment; Broiler management; Footpad dermatitis.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000100301

Storage Period Affects Weight Loss of Japanese Quail Eggs
Provedor de dados: 89
Autores: Roriz,BC; Sgavioli,S; Garcia,RG; Nääs,IA; Domingues,CHF; Caldara,FR; Rombola,LG; Ayla,CM; Bernnecke,K.
ABSTRACT Long storage periods may increase embryo mortality. The objective of this study was to evaluate the effects of storage period on the weight loss, eggshell surface temperature, hatchability, and embryonic mortality of Japanese quail eggs. Two hundred fertile eggs were collected from a flock of 30-week-old Japanese quails (Coturnix coturnix japonica). The eggs were collected for 10 consecutive days after lay, and immediately incubated. A completely randomized experimental design with 10 treatments, corresponding to the number of days eggs were stored between egg collection and setting, with 20 replicates each, was applied. Egg weight loss increased with storage period duration, starting on day 6 (2.1%, on average) and reached 3.26%, on average, in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Embryo; Hatchability; Incubation; Laying; Temperature.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000400589

Evaluating two systems of poultry production: conventional and free-range
Provedor de dados: 89
Autores: Lima,AMC; Nääs,IA.
The improvement in production technology was the major factor that lead Brazil to become the third largest poultry producer. The improvement was world´s based on the careful control of several aspects, including which nutrition and management (environment, health and rearing systems). Nowadays, the search for good welfare conditions is a global tendency in animal production. Concomitantly, an extensive production system of free-range broilers has been increasing in Brazil. This study evaluated in situ production indexes of two different commercial broiler productions, an intensive and conventional (farm A) and a semi-extensive free-range production (farm B), in order to assess the relationship between productivity and management. It was observed that the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broiler; Free-range broiler; Poultry meat; Welfare.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2005000400004

Feeding behaviour of broiler chickens: a review on the biomechanical characteristics
Provedor de dados: 89
Autores: Neves,DP; Banhazi,TM; Nääs,IA.
Feed related costs are the main drivers of profitability of commercial poultry farms, and good nutrition is mainly responsible for the exceptional growth rate responses of current poultry species. So far, most research on the poultry feeding behaviour addresses the productivity indices and birds' physiological responses, but few studies have considered the biomechanical characteristics involved in this process. This paper aims to review biomechanical issues related to feed behaviour of domestic chickens to address some issues related to the feed used in commercial broiler chicken production, considering feed particle size, physical form and the impact of feeders during feeding. It is believed that the biomechanical evaluation might suggest a new way for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Feedstuff; Feeding behaviour; Jaw apparatus; Motion.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000200001

Variables impacting poultry meat quality from production to pre-slaughter: a review
Provedor de dados: 89
Autores: 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

Infrared thermography applied to the evaluation of metabolic heat loss of chicks fed with different energy densities
Provedor de dados: 89
Autores: Ferreira,VMOS; Francisco,NS; Belloni,M; Aguirre,GMZ; Caldara,FR; Nääs,IA; Garcia,RG; Almeida Paz,ICL; Polycarpo,GV.
Brazil must comply with international quality standards and animal welfare requirements in order to maintain its position as world's largest exporter of poultry meat. With the scenario of global climate change there is the forecast of occurrence of extreme events with characteristics of both excess cold and heat for several regions of the country. This study aimed to evaluate the effectiveness of using images of infrared thermography to evaluate the loss of sensible heat in young broilers fed different dietary energy levels. Twenty birds were reared in a house with appropriate brooding using infrared lamps. Birds were distributed in a completely randomized experimental into two treatments: T1 (control diet with 2950 kcal ME/kg-1), and T2 (high-energy diet...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Energy-dense diet; Infrared thermal imaging; Metabolic heat; Poultry; Wellbeing.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2011000200005

Field evaluation of broiler gait score using different sampling methods
Provedor de dados: 89
Autores: Cordeiro,AFS; Nääs,IA; Salgado,DD.
Brazil is today the world's largest broiler meat exporter; however, in order to keep this position, it must comply with welfare regulations while maintaining low production costs. Locomotion problems restrain bird movements, limiting their access to drinking and feeding equipment, and therefore their survival and productivity. The objective of this study was to evaluate locomotion deficiency in broiler chickens reared under stressful temperature conditions using three different sampling methods of birds from three different ages. The experiment consisted in determining the gait score of 28, 35, 42 and 49-day-old broilers using three different known gait scoring methods: M1, birds were randomly selected, enclosed in a circle, and then stimulated to walk out...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal welfare; Environmental rearing conditions; Locomotion deficiency.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2009000300002

Optimization Algorithm Applied to Environmental Control in Broiler Houses
Provedor de dados: 89
Autores: Benvenga,MAC; Nääs,IA; Lima,NDS; Carvalho-Curi,TMR; Reis,JGM.
ABSTRACT The present study aimed to apply the Simulated Annealing (SA) optimization algorithm to find the ideal control of broiler housing rearing environment at 21, 28, 35, and 42 days of growth. Data from four types of houses using environmental control and similar flock density were recorded weekly in the morning and afternoon, during two seasons (summer and winter). The variables related to environmental and air quality data (temperature, relative humidity, air velocity, ammonia, and carbon dioxide concentrations) were registered and organized into the database to provide a descriptive analysis. The ideal rearing conditions were established as a goal, and we used the Simulated Annealing optimization algorithm to process the data. Such an approach may...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broiler rearing; Broiler production; Heat stress mitigation; Simulated Annealing.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2020000300315

Broiler Pre-Slaughter Water Diet with Grass Lemongrass (Cymbopogon Citratus Stapf)
Provedor de dados: 89
Autores: Garcia,RG; Royer,AF; Nääs,IA; Borille,R; Santana,M; Caldara,FR.
ABSTRACT The pre-slaughter management is one of the predisposing factors to the reduction in the quality of the carcass and broiler meat, mainly for being a stressful condition. This study evaluates the inclusion of lemongrass (Cymbopogon citratus Stapf) in the water used in the diet of pre-slaughter broilers for the first time. The carcass and meat quality parameters were evaluated. The experiment was carried out in the poultry production of an experimental sector of the Federal University of Grande Dourados - UFGD. A total of 2,594 broilers were distributed in an entirely randomized design in a factorial arrangement of 3x2x2, with three different lemongrass concentrations in the form of infusion (0. 1 and 5 g/L), two sexes and two genetic strains (Ross...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Meat; Welfare; Phytotherapy; Pre-slaughter; Meat quality.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2017000400725

Identification of critical points of thermal environment in broiler production
Provedor de dados: 89
Autores: 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

Training of catching teams and reduction of back scratches in broilers
Provedor de dados: 89
Autores: 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

Broiler Surface Temperature and Behavioral Response under Two Different Light Sources
Provedor de dados: 89
Autores: Araújo,FE; Garcia,RG; Nääs,IA; Lima,NDS; Silva,RBTR; Caldara,FR.
Light is an important environmental variable for the regulation and control of broiler behavior. Some light sources may also add heat to the rearing environment, and indirectly affect the heat exchange between the birds and the environment. This study aimed at investigation the surface temperature and behavioral response of broilers reared in an environment with monochromatic light emitted diode (LED). Broilers were reared inside commercial dark houses under two treatments: fluorescent or LED light sources. Bird surface temperature and behavior was monitoredfrom the first day of grow-out. The houses were virtually divided in four quadrants, and the variables were monitored in the geometric center of each quadrant. Surface temperature results were mapped,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Monochromatic light; LED; Welfare; Broiler activity.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015000200219

Morphological asymmetry and broiler welfare
Provedor de dados: 89
Autores: 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

Minimum ventilation systems and their effects on the initial stage of turkey production
Provedor de dados: 89
Autores: Mendes,AS; Moura,DJ; Nääs,IA; Morello,GM; Carvalho,TMR; Refatti,R; Paixão,SJ.
This study aimed at evaluating the live performance of turkeys during the initial stage of production (1-26 days of age) and to map the environmental variables inside turkey houses, such as temperature, relative humidity, CO2 concentration, at two distinct minimum ventilation systems. House 1 (H1) was equipped with a negative-pressure ventilation system and House 2 (H2) was equipped with a positive-pressure ventilation system. This study was performed in commercial poultry houses, located in Francisco Beltrão, Paraná, Brazil, in June, 2008. A number of 14,000 turkeys toms at the same age, provided by the same local hatchery and were housed at a stocking density of 23 birds m-2. Three 13 m² boxes with 300 turkeys each were placed inside the poultry houses....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Air renewal; Gases; Poultry house; Thermal comfort.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000100002

Factors that Influence the Production, Environment, and Welfare of Broiler Chicken: A Systematic Review
Provedor de dados: 89
Autores: 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

Productive, Qualitative, and Physiological Aspects of Layer Hens Fed with Propolis
Provedor de dados: 89
Autores: Belloni,M; Almeida Paz,ICL; Nääs,IA; Alves,MCF; Garcia,RG; Caldara,FR; Seno,LO.
ABSTRACT Laying hens reared under tropical conditions are usually under heat stress. Propolis is known for its pharmaceutical properties, such as increasing cell tolerance to hyperthermia, because of its antioxidants effects. This study aimed at evaluating the influence of different dietary propolis inclusion levels on the performance, egg quality, and bird surface temperature of layers. In this experiment 120 55-wk-old Isa Brown(r) layers were distributed according to a completely randomized experimental design into four treatments (0, 1, 2 and 3% dietary propolis inclusion levels), with three replicates of ten birds each. Performance and egg quality parameters, and birds' surface temperature were evaluated. Egg production, egg mass, feed intake, and feed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Egg production; Infrared thermography; Natural diet supplement.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015000400467

Effect of Led Lighting Colors for Laying Japanese Quails
Provedor de dados: 89
Autores: Nunes,KC; Garcia,RG; Nääs,IA; Eyng,C; Caldara,FR; Sgavioli,S; Roriz,BC; Ayala,CM.
ABSTRACT Time of exposure and light intensity rearing house may affect the performance and egg quality of laying quails. This research aimed at evaluating the live performance, egg quality, biometry of the reproductive system, and the gastrointestinal tract of Japanese quails (Coturnix coturnix japonica) exposed to artificial light-emitting diodes (LED) of different colors in comparison with fluorescent lamps. A total of 240 Japanese quails were distributed in completely randomized experimental design with four treatments (fluorescent lamp, and green, red, or blue LED lamps) with six replicates of 10 birds each. Average egg weight and eggshell thickness were different (p&lt;0.05) when LED bulbs were compared with fluorescent lamps. The egg weight of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coturnix coturnix japonica; Light-emitting diode; Fluorescent light bulb; Egg quality.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000500051

WELFARE OF BROILERS INGESTING A PRE-SLAUGHTER HYDRIC DIET OF LEMON GRASS
Provedor de dados: 89
Autores: Royer,AFB; Garcia,RG; Borille,R; Santana,MR; Nääs,IA; Caldara,FR; Almeida Paz,ICL; Zeviani,WM; Alves,FMS; Sgavioli,S; Mariano,WS.
ABSTRACTThe pre-slaughter period is considered critical in broiler production. Several factors contribute to increase the birds' stress, such as handling, harvesting, and transportation, negatively affecting their welfare. This study aimed at evaluating the addition of lemon grass (Cymbopogon citratusStapf) to the drinking water of broilers during the pre-slaughter period on their behavior, blood cortisol, and surface temperature. The study was carried out at the experimental farm of the Federal University of Grande Dourados (UFGD), Dourados, MS, Brazil. In total, 2594 broilers were distributed according to a completely randomized experimental design, in a 3x2x2 factorial arrangement, with four replicates per treatment. Treatments consisted of three...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Behavior; Blood cortisol; Phytotherapy; Body surface temperature.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015000300301

Broiler walking ability and toe asymmetry under harsh rearing conditions
Provedor de dados: 89
Autores: 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

Selecting the most adequate bedding material for broiler production in Brazil
Provedor de dados: 89
Autores: 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

Brazilian chicken meat production chain:a 10-year overview
Provedor de dados: 89
Autores: Nääs,IA; Mollo Neto,M; Canuto,SA; Waker,R; Oliveira,DRMS; Vendrametto,O.
Brazil is the world's largest broiler meat exporter. Health control, knowledge and technology, as well as the natural aspects of the country are pointed out as the keys for the success of that product in the market. Brazilian broiler production grew significantly in the last decade; it creates jobs and has a significant social role in Brazilian economy. This study aimed at evaluating the Brazilian broiler meat supply chain from 2000 to 2010 using the social network analysis (SNA). Data from governmental and private sources were organized and analyzed. The focus of this study was the broiler production supply chain segment involving the hatchery, the broiler farm, the feed mill, the processing plant, and the government. The inputs considered were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Meat market; Broiler meat supply chain; Social network analysis.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015000100087

Incidence of Pododermatitis in Broiler Reared under Two Types of Environment
Provedor de dados: 89
Autores: 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

Practical Assessment of Spaghetti Breast in Diverse Genetic Strain Broilers Reared under Different Environments
Provedor de dados: 89
Autores: Montagna,FS; Garcia,G; Nääs,IA; Lima,NDS; Caldara,FR.
ABSTRACT Brazilian processing plants have identified the so-calledspaghetti breast myopathy characterized by muscular dystrophy of unknown etiology. This study aimed at estimating the incidence of spaghetti breast myopathyin broilers from three commercial genetic strains (Ross, Cobb, Hubbard) reared in two different housing systems (DH, Dark house, and TS, Tunnel system), presenting different controlled ventilation systems and light availability. Breast meat samples (n=5,580) were collected and macroscopically evaluated for spaghetti breast myopathy according to a 0-2 scale, as 0 = normal, 1 = intermediate or moderate, and 2 = severe. A higher number of broilers reared in DH presented normal breasts and moderate myopathy relative to TS-reared birds. Ross...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Muscle structure; Pectoralis major; Rearing environment; Genetic strain; Myopathy.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000200316

Impact of exposure to cold on layer production
Provedor de dados: 89
Autores: Alves,FMS; Felix,GA; Almeida Paz,ICL; Nääs,IA; Souza,GM; Caldara,FR; Garcia,RG.
Infrared thermographic images were used to evaluate the effect of the exposure of layers to cold. In this trial, 540 Isa Brown® layers with an average age of 69 weeks were housed in a conventional layer house typically used in Brazil during a period of cold environmental temperatures. Environmental and heat-transference data were recorded between July 13-16, 2010. It was verified that layers under cold stress conditions lost four times more energy that the recommendations trying to maintain their body temperature. Due to their reduced feed intake capacity, hens are not capable of increasing the availability of the metabolic energy required to maintain their body temperature and egg production, consequently resulting in economic losses.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Infrared image; Housing environment; Heat exchange; Economic evaluation; Egg production.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2012000300010

Efeito da Densidade de Criação e do Sexo Sobre o Empenamento, Incidência de Lesões na Carcaça e Qualidade da Carne de Peito de Frangos de Corte
Provedor de dados: 89
Autores: Garcia,RG; Mendes,AA; Garcia,EA; Nääs,IA; Moreira,J; Almeida,ICL; Takita,TS.
O experimento foi conduzido nas instalações experimentais da Faculdade de Medicina Veterinária e Zootecnia - UNESP, Campus de Botucatu, SP, Brasil, com o objetivo de avaliar o efeito da densidade de criação e do sexo sobre o empenamento, incidência de lesões na carcaça e a qualidade de carne de peito de frangos de corte. Foram utilizados 1950 pintos de corte sexados, da linhagem Ross, distribuídos em um delineamento inteiramente casualizado, com esquema fatorial com 3 densidades (10, 13 e 16 aves/m²) e dois sexos com 5 repetições, sendo que uma foi destinada exclusivamente para reserva, criados até os 42 dias de idade. Aos 28, 35 e 42 dias foram amostradas 3 aves por repetição para a determinação do empenamento através da porcentagem de penas e 10 aves...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Densidade; Empenamento; Frangos de corte; Lesões na carcaça; Qualidade de peito.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2002000100004

Poultry welfare scenario in South America: norms and regulations
Provedor de dados: 89
Autores: Silva,RBTR; Nääs,IA; Broom,DM; O'Driscoll,K.
Animal welfare related issues have been intensely discussed in recent years as a consequence of changes in public attitudes and regulatory reforms that are taking place in many countries. A combination of public opinion pressure and trade policy has driven requirements for regulation and the World Trade Organization (WTO) assigned the World Organization for Animal Health (OIE) to develop guidelines that could be used as international standards. However, trade disputes related to animal welfare are not likely to be resolved under the auspices of OIE, and access to international markets may be questioned in a way that does not necessarily reflect attitudes to animal production in emerging economies, such as those in South America. This paper presents an...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Competitiveness; Developing countries; International trade; Welfare policies.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2011000200001

Analysis of Barriers to Brazilian Chicken Meat Imports
Provedor de dados: 89
Autores: Aranda,MA; Sgavioli,S; Domingues,CHF; Santos,ET; Nääs,IA; Moura,JB; Garcia,RG.
ABSTRACT Trade liberalization during the last decades has increased among nations as a result of decreased tariffs. However, during the same period, market agents have created new protection measures to replace such mechanisms in an attempt to promote the domestic economic stability of countries, while expanding and ensuring the trade between nations. Considering that Brazil is the second largest broiler producer and chicken-meat exporter worldwide, the present study proposed to analyze the main barriers imposed on Brazilian chicken meat imports by the ten major importing countries. This is a documentary research with primary and secondary data, of a descriptive-exploratory nature, under a qualitative approach. Semi-structured questionnaires including...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Poultry production; International trade; Exports; Protectionism.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000200312

Implications of the use of sorghum in broiler production
Provedor de dados: 89
Autores: Garcia,RG; Mendes,AA; Almeida Paz,ICL; Komiyama,CM; Caldara,FR; Nääs,IA; Mariano,WS.
This study aimed at evaluating total or partial replacement of corn by sorghum in broiler diets and at estimating the effect of the pigment supplementation on broiler performance, carcass and cuts yield, and possible breast and leg pigmentation. We used 1680 one-d-old Ross® 308 broilers. Birds were sexed and distributed according to a completely randomized design (2 x 3 + 1). Treatments consisted of a control diet based on corn and diets with two levels corn replacement by sorghum (50 and 100%) and three pigments levels, with four replicates of 60 birds per treatment. There was no effect (p &amp;gt; 0.05) of the dietary replacement of corn by sorghum on performance, carcass and parts yield, and no changes in breast and leg meat pH (p &amp;gt;0.05). Meat...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Birds; Meat quality; Pigments; Replacement of corn.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000300013

Factors Affecting Broiler Production: A Meta-Analysis
Provedor de dados: 89
Autores: 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

Characterization of heat waves affecting mortality rates of broilers between 29 days and market age
Provedor de dados: 89
Autores: Vale,MM; Moura,DJ; Nääs,IA; Pereira,DF.
Climate may affect broiler production, especially where there are heat waves, which may cause high mortality rates due to the heat stress. Heat wave prediction and characterization may allow early mitigation actions to be taken. Data Mining is one of the tools used for such a characterization, particularly when a large number of variables is involved. The objective of this study was to classify heat waves that promote broiler chicken mortality in poultry houses equipped with minimal environmental control. A single day of heat, a heat-shock day, is capable of producing high broiler mortality. In poultry houses equipped with fans and evaporative cooling, the characterization of heat waves affecting broiler mortality between 29 days of age and market age...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Heat shock day; Heat wave; Mortality; Productivity losses.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2010000400010

Multi-criteria analysis of the influence of rearing, equipment, and catching management practices on the Incidence of back scratches in broilers
Provedor de dados: 89
Autores: Pilecco,M; Almeida Paz,IC de L; Tabaldi,LA; Nääs,IA; Garcia,RG; Caldara,FR; Andrela,GO.
Carcass quality is one of the main parameters to evaluate broiler welfare, and the presence of back scratches indicates that the birds were submitted to stress. The objective of this study was to identify the best management practices during rearing and catching, taking into consideration broiler genetic differences (genetic lines A and B) and sexes. The survey was carried out in 351 broiler houses belonging to an integrated company and located in the region of Dourados, MS, Brazil. Between January and October, 2010, 2% of broilers of all ages (one to 43 days old) in all flocks were sampled. The sampled flock was evaluated in 21 d intervals. Scratches were classified as present or absent. The results indicated that catching management has the strongest...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: AHP; Poultry production; Catching; Carcass.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2012000400007

Effect of the litter material on drinking water quality in broiler production
Provedor de dados: 89
Autores: Garcia,RG; Almeida,Paz ICL; Caldara,FR; Nääs,IA; Pereira,DF; Freitas,LW; Schwingel,AW; Lima,NDS; Graciano,JD.
Considering the importance of drinking water and its effect on broiler performance, drinking water quality was studied using six different litter materials. The presence of coliform bacteria and Escherichia coli was investigated. The following litter materials were used in the trial: wood shavings, rice husks, chopped Napier grass (Pennisetum pupureum), 50% sugarcane bagasse (Saccharum L.) + 50% wood shavings, 50% sugarcane bagasse (Saccharum L.) + 50% rice husks, and plain sugarcane bagasse (Saccharum L.). A number of 1620 Ross® one-day-old chicks were reared in 54 pens measuring 4.5 m² each, equipped with a bell drinker and a tube feeder. Water samples were collected in sterile tubes on days 28 and 42 of the rearing period, and submitted to the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broiler health; Contamination; Welfare.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2010000300005

Litter materials and the incidence of carcass lesions in broilers chickens
Provedor de dados: 89
Autores: Garcia,RG; Almeida Paz,ICL; Caldara,FR; Nääs,IA; Bueno,LGF; Freitas,LW; Graciano,JD; Sim,S.
The aim of this study was to evaluate the effects of different litter materials on litter compaction, broiler feathering and the incidence of carcass lesions. In the experiment, 3240 one-day-old Ross® chicks were selected by sex and distributed according to a completely randomized experimental design in a 2 x 6 factorial arrangement (two sex and six litter materials). The following litter materials were used: wood shavings, rice husks, chopped Napier grass, 50% sugar cane bagasse plus 50% wood shavings, 50% sugar cane bagasse plus 50% rice husks, and pure sugar cane bagasse. Litter compaction was weekly assessed using a penetrometer. On days 21, 35 and 42 of the experimental period, feathering on the back and legs was scored according to a 0 - 10 scale. On...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Compaction; Fathering; Quality; Substrate.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2012000100005

Effect of High Incubation Temperature on the Blood Parameters of Layer Chicks
Provedor de dados: 89
Autores: Sgavioli,S; Santos,ET; Domingues,CHF; Quadros,TCO; Castiblanco,DMC; Andrade-Garcia,GM; Amoroso,L; Nääs,IA; Garcia,RG; Baraldi-Artoni,SM.
ABSTRACT Adequate environmental temperature control is essential for incubation efficiency. Layer breeder eggs (n=360) were weighed and distributed in a completely randomized experimental design with two treatments, consisting of two incubation temperatures (T1=37.5 °C, control; and T2=39.0 °C, hot), with two incubators per temperature, and 90 eggs per incubator, totaling 360 eggs. Hatchability, embryo mortality, and chick cloacal and body surface temperatures were not affected by incubation temperature. Eggs incubated at the hot temperature presented greater egg mass loss and higher eggshell conductance than those incubated at the control temperature. Layer chicks derived from eggs incubated at control temperature showed greater absolute weight, yolk-free...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Body weight; Cloacal temperature; Conductance; Hatchability; Loss of mass.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000600041

Níveis de Ruídos na Produção de Matrizes Pesadas: Estudo de Caso
Provedor de dados: 89
Autores: 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

Risk of Incidence of Hock Burn and Pododermatitis in Broilers Reared under Commercial Conditions
Provedor de dados: 89
Autores: 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

Selecting appropriate bedding to reduce locomotion problems in broilers
Provedor de dados: 89
Autores: Almeida Paz,ICL; Garcia,RG; Bernardi,R; Nääs,IA; Caldara,FR; Freitas,LW; Seno,LO; Ferreira,VMOS; Pereira,DF; Cavichiolo,F.
Two experiments were carried out at the Poultry Sector of the School of Agrarian Sciences of the Federal University of Grande Dourados to evaluate the incidence of leg problems in broilers reared on two distinct types of bedding material: rice husks or wood shavings, both new and reused. In both trials, a randomized experimental design was applied in factorial arrangement (2 x 2 x 2) using two genetic strains (Cobb® or Ross®); two sexes (male or female), and two litter materials (rice husks or wood shavings). In each trial 1080 one day pullets were reared equally divided in the treatments. The birds were placed in 4.5 m² boxes at a density of 10 birds m-2. All birds were fed diets with equal nutritional density, and water was offered ad libitum. Feeds were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gait score; Leg problems; Multicriteria analysis; Rice husks; Wood shaving.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2010000300008