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| Nääs,Irenilza de Alencar; Paz,Ibiara Correia de Lima Almeida; Baracho,Marta dos Santos; Menezes,Adriana Gomes de; Lima,Karla Andrea Oliveira de; Bueno,Leda Gobbo de Freitas; Mollo Neto,Mario; Carvalho,Victor Ciaco de; Almeida,Ianê Correia de Lima; Souza,Anderson Luiz de. |
| Locomotion deficiencies in broiler production cause poor welfare and lead to change in drinking and feeding behavior with consequent loss in weight gain. This research aimed to assess locomotion deficiencies in broiler chicken by analyzing the vertical peak force on both feet during walk. A chamber was built with an inlet ramp, a horizontal walkway in the middle and an outlet ramp. In the walkway a thin mat with piezoelectric crystal sensors was placed to record the step vertical peak force of the feet while walking on the force platform. The measurement system consisted of a mat with electronic sensors and software that allowed real time recording of the forces and the processing and analysis of data. Footage was taken from two digital video cameras and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Poultry production; Gait scoring; Feet force measurement; Welfare. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000200001 |
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| Heinrichs,Reges; Grano,Fernanda Grecco; Bueno,Leda Gobbo de Freitas; Soares Filho,Cecílio Viega; Fagundes,Jailson Lara; Rebonatti,Melina Daniel; Oliveira,Katia de. |
| Among the production factors, adequate fertilization is an important tool to raise the productivity of pastoral systems and consequently increase the share of Brazil in the supply chain of primary agricultural products at the global level. The objective of this study was to evaluate the interaction of nitrogen and sulfur fertilization in BRACHIARIA DECUMBENS: Stapf. The experiment in pots with Dystrophic Oxisol was evaluated in a completely randomized design with four replications in a 5 x 3 factorial arrangement, involving five N doses (0, 100, 200, 400, and 800 mg dm-3) in the form of ammonium nitrate and three S doses (0, 20 and 80 mg dm-3) in the form of calcium sulfate, with a total of 15 treatments. In the treatments with low S dose, calcium was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fertilization; Brachiaria decumbens; Plant nutrition; Forage plants. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000400017 |
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| Pereira,Danilo Florentino; Batista,Edna dos Santos; Sanches,Filipe Teixeira; Gabriel Filho,Luís Roberto Almeida; Bueno,Leda Gobbo de Freitas. |
| O objetivo deste trabalho foi determinar diferenças comportamentais entre poedeiras criadas sob diferentes densidades e tamanhos de grupo, em condições de ambiente enriquecido. Foram utilizadas poedeiras Isa Brown com idade entre 30 e 32 semanas alojadas em galpões de escala reduzida e distorcida. As aves foram criadas durante 28 dias, em baias com cama de maravalha, poleiro e ninho. Foram avaliados dois tamanhos de grupos (6 e 12 aves) e duas densidades de criação (774 e 1.440 cm² por ave), em arranjo fatorial com três repetições. Em amostras de vídeo de 15 min, foram registrados as frequências e os tempos de expressão dos comportamentos: arrumar penas, banho de areia, bater asas, beber água, bicar, coçar a cabeça, ciscar, comer, empoleirar, esticar... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bem-estar animal; Etologia; Sistemas de criação; Zootecnia de precisão. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000600014 |
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| Brunassi,Leandro dos Anjos; Moura,Daniella Jorge de; Nääs,Irenilza de Alencar; Vale,Marcos Martinez do; Souza,Silvia Regina Lucas de; Lima,Karla Andrea Oliveira de; Carvalho,Thayla Morandi Ridolfi de; Bueno,Leda Gobbo de Freitas. |
| Production losses due to lack of precision in detecting estrus in dairy cows are well known and reported in milk production countries. Nowadays automatic estrus detection has become possible as a result of technical progress in continuously monitoring dairy cows using fuzzy pertinence functions. Dairy cow estrus is usually visually detected; however, solely use of visual detection is considered inefficient. Many studies have been carried out to develop an effective model to interpret the occurrence of estrus and detect estrus; however, most models present too many false-positive alerts and because of this they are sometimes considered unreliable. The objective of this research was to construct a system based on fuzzy inference functions evaluated with a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Estrus cycle; Artificial intelligence; Expert system. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000500002 |
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| Carvalho,Thayla Morandi Ridolfi de; Moura,Daniella Jorge de; Souza,Zigomar Menezes de; Souza,Gustavo Soares de; Bueno,Leda Gobbo de Freitas. |
| O objetivo deste trabalho foi avaliar as condições iniciais de alojamento de aves, de um dia de idade, em termos da qualidade da cama de frango reutilizada e do ar, em aviários comerciais de produção com diferentes sistemas de ventilação mínima e tipologia, por meio de análise geoestatística. O experimento foi realizado em quatro aviários: Blue House I (T1) e Blue House II (T2), Dark House (T3) e Convencional (T4). As variáveis analisadas foram: pH, umidade, temperatura superficial e concentração de amônia, tendo-se coletado as amostras na altura dos frangos, em 80 pontos equidistantes no interior do pinteiro. A análise geoestatística auxiliou a identificação de pontos críticos no controle dos ambientes estudados. O manejo da ventilação mínima não é... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cama reutilizada; Casca de arroz e café; Conforto animal; Geoestatística; Maravalha; Sistema de ventilação mínima. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2011000400003 |
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| Carvalho,Thayla Morandi Ridolfi de; Moura,Daniella Jorge de; Souza,Zigomar Menezes de; Souza,Gustavo Soares de; Bueno,Leda Gobbo de Freitas; Lima,Karla Andrea Oliveira de. |
| The objective of this research was to evaluate different minimum ventilation systems, in relation to air quality and thermal comfort using geostatistics in brooding phase. The minimum ventilation systems were: Blue House I: exhaust fans + curtain management (end of the building); Blue House II: exhaust fans + side curtain management; and Dark House: exhaust fans + flag. The climate variables evaluated were: dry bulb temperature, relative humidity, air velocity, carbon dioxide and ammonia concentration, during winter time, at 9 a.m., in 80 equidistant points in brooding area. Data were evaluated by geostatistic technique. The results indicate that Wider broiler houses (above 15.0 m width) present the greatest ammonia and humidity concentration. Blue House... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Air quality; Environment; Kriging; Poultry; Welfare. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000100028 |
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