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| Lima,Karla A. O.; Nääs,Irenilza de A.; Garcia,Rodrigo G.; Borille,Rodrigo; Caldara,Fabiana R.. |
| Broiler production is highly dependent on the use of artificial light. The light source may affect the effectiveness of housing conditions due to increasing ambient temperature and concentration of noxious gases. This research aimed to evaluate the effects of different bulb types on the thermal, aerial, and acoustic environment of broiler aviaries. The experiment was carried out at a commercial broiler farm in Dourados, Mato Grosso do Sul State, Brazil. Three aviaries were used, and two flocks of male broilers from Cobb® genetic strain were reared from the first day to slaughter. Each aviary was equipped with a different light source, comprising the adopted treatments (A1 - incandescent light bulb, control; A2 - sodium vapor light bulb; A3 - fluorescent... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Poultry industry; Gas concentration; Lighting; Temperature. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000300006 |
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| Moi,Marta; Nääs,Irenilza de A.; Caldara,Fabiana R.; Paz,Ibiara C. de L. Almeida; Garcia,Rodrigo G.; Cordeiro,Alexandra F. S.. |
| This study aimed to identify differences in swine vocalization pattern according to animal gender and different stress conditions. A total of 150 barrow males and 150 females (Dalland® genetic strain), aged 100 days, were used in the experiment. Pigs were exposed to different stressful situations: thirst (no access to water), hunger (no access to food), and thermal stress (THI exceeding 74). For the control treatment, animals were kept under a comfort situation (animals with full access to food and water, with environmental THI lower than 70). Acoustic signals were recorded every 30 minutes, totaling six samples for each stress situation. Afterwards, the audios were analyzed by Praat® 5.1.19 software, generating a sound spectrum. For determination of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sound intensity; Sound attributes; Animal welfare. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000300008 |
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| Santana,Mayara R. de; Garcia,Rodrigo G.; Naas,Irenilza de A.; Paz,Ibiara C. de L. A.; Caldara,Fabiana R.; Barreto,Bruna. |
| Light emitting diode (LED) has been used in commercial poultry industry by presenting superior energy savings and providing feasibility on production process. The objective of this research was to evaluate performance and carcass yield of broiler chickens exposed to different LED colors compared with fluorescent lamps. For that, two experiments (E1 and E2) were performed and 2,646 Cobb® chickens were used. In experiment E1, male birds were exposed to 20 lux artificial lighting with red, yellow, blue, and white LED bulbs; and fluorescent bulb. In experiment E2, male and female birds were exposed to 15 lux artificial lighting with red and blue LED bulbs; and fluorescent bulb. Cumulative weight gain (kg), feed intake (kg), feed conversion, hot carcass weight... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Poultry; Production; Artificial lighting. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000300005 |
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| Machado,Sivanilza T.; Santos,Rodrigo C.; Caldara,Fabiana R.; Gonçalves,Manoel C.; Nääs,Irenilza de A.. |
| The aim of this study was to investigate the effect of pre-slaughter handling on the occurrence of PSE (Pale, Soft, and Exudative) meat in swine slaughtered at a commercial slaughterhouse located in the metropolitan region of Dourados, Mato Grosso do Sul, Brazil. Based on the database (n=1,832 carcasses), it was possible to apply the integrated multivariate analysis for the purpose of identifying, among the selected variables, those of greatest relevance to this study. Results of the Principal Component Analysis showed that the first five components explained 89.28% of total variance. In the Factor Analysis, the first factor represented the thermal stress and fatiguing conditions for swine during pre-slaughter handling. In general, this study indicated the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Transport operation; Ambience; PSE meat; Multivariate analysis. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000300007 |
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| Caldara,Fabiana R.; Rosa,Poliana S. G.; Ferreira,Rony A.; Reis,Nayana M. de O.; Nääs,Irenilza de A.; Paz,Ibiara C. de L. A.; Garcia,Rodrigo G.; Ferreira,Viviane M. O. dos S.. |
| An experiment was conducted to evaluate the behavior, performance and physiological parameters of pigs in different production systems. Twenty four animals in the growth phase were distributed in a randomized block design in three treatments: T1 - concrete floor, T2 - deep bedding with wood shaving, and T3 - deep bedding with coffee husks. The behavioral study was carried out by observing the animal behavior for an uninterrupted period of eight hours throughout seven weeks. The proportions of time spent in each behavior were characterized using the frequency histogram composition. Environmental (IBGTH), physiological (rectal and skin temperature and respiratory rate) and performance (weight gain, feed intake and feed conversion) parameters were measured in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Environment; Animal welfare; Coffee husks; Wood shaving; Swine production. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000100005 |
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| Machado,Sivanilza T.; Santos,Rodrigo C.; Caldara,Fabiana R.; Gonçalves,Manoel C.; Jordan,Rodrigo A.; Reis,João G. M. dos. |
| Este estudo foi conduzido com o objetivo de investigar a incidência de carne PSE (pale, soft and exudative) em suínos abatidos em um abatedouro comercial, localizado em Mato Grosso do Sul, no período de maio de 2009 a julho de 2010. A partir do banco de dados (n = 854 carcaças), aplicou-se a regressão logística múltipla com a finalidade de desenvolver um modelo para constatar a influência das variáveis selecionadas na probabilidade de risco de incidência de carne PSE. Desta forma, a variável dependente foi construída pela identificação de carne PSE em carcaças de suínos com valores de pH45 inferior ou igual a 5,8. Para obtenção do modelo com maior capacidade de predição foram aplicados o método de máxima verossimilhança para estimação de parâmetros e a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: PSE; Manejo pré-abate; Ambiência; Regressão logística; Técnica stepwise. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662014001000012 |
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| Borille,Rodrigo; Garcia,Rodrigo G.; Nääs,Irenilza A.; Caldara,Fabiana R.; Santana,Mayara R.. |
| ABSTRACTLight is an important environmental factor for birds, allowing not only their vision, but also influencing their physiological responses, such as behavioral and reproductive activity. The objective of this experiment was to evaluate the impact of different colors of monochromatic light (LED) sources in laying hens production during the second laying cycle. The study was conducted in an experimental laying house during 70 days. A total of 300 laying hens Isa Brown® genetic strain, aged 95 weeks, in the second laying cycle were used in the study. The artificial light sources used were blue, yellow, green, red and white. The light regimen was continuous illumination of 17 h per day (12 h natural and 5 h artificial) in a daily light regimen of 17L:5D... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Artificial lighting; Egg production; Color of light source. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015000900877 |
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