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Registros recuperados: 10
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Behavior, performance and physiological parameters of pigs reared in deep bedding REA
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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EFFECT OF THERMAL STIMULATION IN EMBRYOS FROM COBB®GENETIC STRAIN UNDER COMMERCIAL SCALE REA
Flores,Fernanda; Nääs,Irenilza De A.; Garcia,Rodrigo G..
ABSTRACT Studies aimed at producing stronger birds and with better growth performance are being developed involving artificial incubation. To that extent, thermal stimulation by the heat of 1.39 ºC and 1ºC above the standard, and by cold of 36 ºC fixed, were applied in the last week of the embryonic development (day 14 to day 18) to Cobb® strain birds of 33 to 53 weeks age. With the purpose of evaluating the behavior of the embryos facing these temperature stimuli to identify what is the best amplitude, frequency and the most appropriate period to perform temperature variation, obtaining more adapted birds to the field. It has been observed that heat or cold stimulation did not cause embryo mortality and did not affect the hatching and the quality of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hatchability; Incubation; Chick quality; Thermal variation.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000200236
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Estimating the most important criteria for hatching eggs as function of broiler breeders age REA
Baracho,Marta dos S.; Nääs,Irenilza de A.; Neves,Diego P.; Cassiano,Juliano de A.; Lima,Fabiana G.; Moura,Daniella J. de; Garcia,Rodrigo G..
This research aimed to compare two female broiler breeder ages during the incubation period regarding management using the Analytic Hierarchy Process method (AHP). This method is characterized by the possibility of analyzing a multicriteria problem and assists a decision making. This study was carried out on a commercial hatchery located in São Paulo, Brazil. Two ages of broiler breeder (42 and 56 weeks) were compared relative to production rate. Production index data were the same in both ages and were submitted to multicriteria decision analysis using the AHP method. The results indicate that broiler breeders of 42 weeks presented better performance than those of 56 week-old. The setter phase (incubation) is more critical than the hatcher. The AHP method...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Multi-stage incubator; Multi criteria analysis; Broiler breeders' production.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000300002
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Heat loss in one day old pullets inside a hatchery REA
Nääs,Irenilza de A.; Graciano,Daniela E.; Garcia,Rodrigo G.; Santana,Mayara R. de; Neves,Diego P..
After hatching, pullets are transported to brooding area and vaccinated. One day old chicks have not already developed thermoregulation ability; thus, brooding temperature variations may affect pullet quality leading to broiler meat production losses. This research aimed to calculate sensible heat loss in one day old pullets in hatching area and vaccination room. Ten one day old pullets were randomly selected from hatching area of a commercial hatchery. Infrared images were used to calculate bird surface temperature. Exposure areas for the two conditions were quantified, and both air temperature and wind speed was recorded. Total sensible heat loss was calculated as heat loss by radiation plus heat loss by convection. It was found that heat transfer occurs...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Sensible heat; Post-hatching; Infrared thermography.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000400001
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Identification of acoustic parameters for broiler welfare estimate REA
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
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Impact of different light sources on broiler rearing environment REA
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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Light emitting diode (LED) use in artificial lighting for broiler chicken production REA
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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Monochromatic light-emitting diode (LED) source in layers hens during the second production cycle AGRIAMBI
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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THE TYPOLOGY OF BROILER HOUSE AND THE IMPACT IN THE LOCOMOTION OF BROILERS REA
Garcia,Rodrigo G.; Lima,Nilsa D. da S.; Naas,Irenilza de A.; Caldara,Fabiana R.; Sgavioli,Sarah.
ABSTRACT The large majority of broiler houses use two types of systems: dark-house system - DHP, and tunnel with curtain system - ATC. The objective of the present study was to evaluate the association and the prevalence of locomotion issues in the broiler commercial farming systems (DHP and ATC). For assessing the thermal environment and the litter quality, a completely random design was adopted using two factors (broiler houses, DHP and ATC) with 12 repetitions. To study the surface temperature of the broiler breast, and the locomotion ability (gait score) a completely randomized design was adopted in a double factorial scheme 2 × 2 (two houses typology vs. sex) with 24 repetitions. To verify whether the type of house and the sex were associated to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Broiler houses; Gait score; Spondylolisthesis; Surface temperature.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000300326
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Vocalization data mining for estimating swine stress conditions REA
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
Registros recuperados: 10
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