|
|
|
| Registros recuperados: 22 | |
|
|
| 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 |
| |
|
| |
|
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
| |
|
| |
|
|
| 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 |
| |
| Registros recuperados: 22 | |
|
|
|
