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In the way to reduce costs in the poultry production, high densities of birds are adopted in the production systems. Such high densities can lead to an inappropriate environment, compromising the welfare and decreasing the animal performance. In this work we aimed to evaluate the effects of different densities on the productive yield, egg quality and immunological aspects of Japanese quails. It was used 816 Japanese quails, during egg production phase, in a random design, with four treatments (121.43 cm2/bird; 106.25 cm2/bird; 94.44 cm2/bird and 85.00 cm2/bird) with six repetitions each. Results indicate density did not interfere on egg quality and all treatments can be considered excellent, once the Haugh Unit was 88.03. Therefore, higher densities decline the yield, decreasing the eggs weight (10.35 g), the laying percentage (88%), egg mass (9.16 g) and the week average feed consumption (157.35 g). IgY values were higher at smaller cage density, suggesting birds in this condition presented better immunological condition, related to welfare and stress factors, all linked to immunoglobulins IgY.

Bovine meat and bone meal (MBM) has been used as a low-cost protein source in corn- and soybean meal-based poultry diets. However, to date, no studies investigating the effect of the dietary inclusion of MBM on the performance of Japanese quails and on egg production costs were found in literature. In this study, 600 Japanese quails in lay were distributed in a completely randomized experimental design consisting of six treatments (replacement levels of soybean meal by MBM:0, 1, 2, 3, 4, and 5%) with five replicates of 20 birds each to investigate if MBM is a viable alternative to maintain or to improve the live and economic performances of these birds. Treatments consisted of a control diet, based on corn and soybean meal, with no inclusion of MBM, and diets formulated with increasing levels (1, 2, 3, 4, and 5%) of MBM inclusion at the expense of soybean meal. The studied parameters were evaluated in four periods of 28 days each. Live performance parameters (egg weight, g; average egg production, %; egg weight, g; feed intake, g; feed conversion ratio per egg mass, kg/kg and per dozen eggs, dz/kg; and livability, %); egg quality parameters (proportion of egg components, yolk, albumen, eggshell %; egg specific weight, g/cm3); and economic parameter (bio-economic nutritional index) were determined. Only egg weight, egg specific weight, and eggshell percentage were affected (p

Organic acids are used as feed additives to promote growth of weaned piglets since they prevent the occurrence of diarrhea. Thus, performance and digestibility assays were conducted and economic viability of diets was evaluated. In the performance assays, 64 hybrid piglets weaned with a mean weight of 5.87±0.31kg were divided in a randomized block design consisting of 4 treatments, 8 repetitions and 2 piglets per experimental unit (1 castrated male and 1 female). In the digestibility assay, 24 castrated male hybrid piglets with a mean weight of 8.21±0.79kg were individually assigned to 4 treatments and 6 repetitions. The treatments in the two assays were as follows: control, basal diet without addition of an acidifier; blend: inclusion of 0.5% of a mixture of organic acids; butyrate: inclusion of 0.1% of sodium butyrate; blend+butyrate: inclusion of 0.5% of a mixture of organic acids and 0.1% sodium butyrate. There was no effect (P>0.05) of the acidifiers on animal performance during the period studied. Organic acids exerted no effect (P>0.05) on the apparent digestibility coefficients of nutrients. Diets supplemented with sodium butyrate had an economic advantage for the period of 10-24 days. No episode of diarrhea was observed. This study demonstrated no effect of acidifier feed additives as growth promoters in complex diets for weaned piglets. RESUMO Ácidos orgânicos são utilizados como aditivos promotores de desempenho em leitões, pois podem prevenir a ocorrência de diarreias. Para tanto, foram conduzidos ensaios de desempenho, digestibilidade, e foi avaliada a viabilidade econômica das dietas. No desempenho, foram utilizados 64 leitões híbridos desmamados, com peso médio de 5,87±0,31kg, distribuídos em um delineamento em blocos ao acaso, com quatro tratamentos, oito repetições e dois leitões por unidade experimental (sendo um macho castrado e uma fêmea). Na digestibilidade, 24 leitões machos, castrados, híbridos, com peso médio de 8,21±0.79kg, foram alojados individualmente em quatro tratamentos e seis repetições. Em ambos os ensaios, os tratamentos foram: controle: dieta basal sem uso de acidificante; Blend: inclusão de 0,5% da mistura de ácidos orgânicos; butirato: inclusão de 0,1% de butirato de sódio; Blend+Butirato: inclusão de 0,5% da mistura de ácidos orgânicos e 0,1% butirato de sódio. Não houve efeito dos acidificantes (P>0,05) sobre o desempenho no período estudado. Não houve efeito dos ácidos orgânicos (P>0,05) sobre os coeficientes de digestibilidade aparente dos nutrientes. Dietas com suplementação de butirato de sódio apresentaram melhor vantagem econômica para o período de 10-24 dias. Não houve incidência de diarreia em nenhum período. Não ficou evidenciado o efeito dos aditivos acidificantes como promotores de crescimento em dietas complexas para leitões desmamados.

Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T18:40:21Z No. of bitstreams: 1 S1516-635X2013000100010.pdf: 674758 bytes, checksum: e1467f940779325eee60ab095cf63094 (MD5) Made available in DSpace on 2013-08-22T18:40:21Z (GMT). No. of bitstreams: 1 S1516-635X2013000100010.pdf: 674758 bytes, checksum: e1467f940779325eee60ab095cf63094 (MD5) Previous issue date: 2013-03-01 Made available in DSpace on 2013-09-30T19:25:48Z (GMT). No. of bitstreams: 2 S1516-635X2013000100010.pdf: 674758 bytes, checksum: e1467f940779325eee60ab095cf63094 (MD5) S1516-635X2013000100010.pdf.txt: 26277 bytes, checksum: b660c3f8361a13a158e818150883f69d (MD5) Previous issue date: 2013-03-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T15:07:16Z No. of bitstreams: 2 S1516-635X2013000100010.pdf: 674758 bytes, checksum: e1467f940779325eee60ab095cf63094 (MD5) S1516-635X2013000100010.pdf.txt: 26277 bytes, checksum: b660c3f8361a13a158e818150883f69d (MD5) Made available in DSpace on 2014-05-20T15:07:17Z (GMT). No. of bitstreams: 2 S1516-635X2013000100010.pdf: 674758 bytes, checksum: e1467f940779325eee60ab095cf63094 (MD5) S1516-635X2013000100010.pdf.txt: 26277 bytes, checksum: b660c3f8361a13a158e818150883f69d (MD5) Previous issue date: 2013-03-01 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) The objective of this study was to trace the inclusion of bovine meat and bone meal (BMBM) in the diet of Japanese quails by analyzing eggs and egg fractions (yolk and albumen) by the technique of carbon-13 (13C) and nitrogen-15 (15N) stable isotopes. In the trial, 120 Japanese quails were distributed in six treatments with four replicates of five birds each. The following treatments were applied: feed based on corn and soybean meal, containing graded BMBM inclusions (0, 1, 2, 3, 4 or 5%). After 42 days, 20 eggs per treatment were randomly collected for three consecutive days. Ten eggs were used for yolk and albumen sample collection, and ten for total egg sample collection. It was possible to detect the dietary inclusion of 1% BMBM in the egg and its fractions. Therefore, the technique of isotopes 13C and 15N is able of tracing since 1% inclusion level of BMBM in the diet of Japanese quails in eggs and their fractions. UNESP UNESP IBB Department of Physics and Biophysics Agência Paulista de Tecnologia dos Agronegócios DVM - Granjas Kakimoto UNESP UNESP IBB Department of Physics and Biophysics FAPESP: 07/06707-8

Com o objetivo de avaliar o efeito da debicagem e do tipo de bebedouro sobre o desempenho produtivo de codornas japonesas, 672 fêmeas de codornas de um dia foram usadas em um delineamento inteiramente casualizado e distribuídas em um dos três tratamentos como não-debicagem; debicagem até 1/3 dos bicos; e cauterização, com oito repetições de 28 aves na fase de cria. As aves foram debicadas aos 21 dias de idade e, no 35 dia, foram avaliados o ganho de peso, o consumo de ração, a conversão alimentar e a taxa de mortalidade. Aos 39 dias, 576 codornas foram remanejadas para gaiolas de postura, distribuídas em esquema fatorial 3 × 2, composto de três tipos de debicagem e dois tipos de bebedouro (taça e nipple), de modo que cada combinação foi avaliada com quatro repetições de 24 aves. A fase de produção teve início quando as aves atingiram 50% de produção de ovos, aos 60 dias de idade. As codornas submetidas a debicagem por cauterização apresentaram menor ganho de peso e menor consumo de ração na fase de cria. O estresse pela dor com a debicagem por cauterização pode justificar não só o menor consumo e o menor ganho de peso, como também a maior mortalidade. Infere-se que este método, por ser mais demorado, tenha provocado mais dor e maior nível de estresse, piorando o desempenho das aves. A debicagem de 1/3 dos bicos cortados pode ter ocasionado estresse menos intenso às aves, não interferindo no desempenho. Não se observaram diferenças no desempenho das aves e na qualidade de ovos entre os tipos de bebedouro e métodos de debicagem utilizado na fase de produção. O método de debicagem por cauterização influencia o desempenho de codornas na fase de cria, mas, na fase de produção, assim como o tipo de bebedouro utilizado, não interfere no desempenho das aves nem na qualidade de ovos. A total of 672 one day old- female quails was allotted to a completely randomized experimental design, with three treatments (non-trimmed birds; 1/3 of the beak trimmed and cauterized beak), 8 replicates of 28 birds to evaluate the effect of beak trimming and drinking system on productive performance. The birds were beak trimmed at 21 days of age, and at day 35 the weight gain, feed intake, feed conversion and mortality were evaluated. At day 39, 576 quails were transfered to laying cages, and assigned to a 3x2 factorial arrangement, to evaluate three beak trimming methods and two drinking systems (cup and nipple) by using four replicates of 24 birds each. The production phase started when the birds reached 50% egg production, at 60 days of age. The quails submitted to beak trimming by cauterization showed smaller weight and lower feed intake during the initial period. Stress pain due to the cauterized beak can justify not only lower feed intake and lower weight gain, but also increased mortality. It can be inferred that once this method takes more time it has caused more pain and higher levels of stress, worsening the performance of birds. The trimmed to 1/3 of the beaks cut can have caused stress to the birds less intense, without effect on performance. No differences on bird performance and egg quality were observed between drinking systems and beak trimming during the laying phase. In the initial phase, beak trimming system reduced performance, however, during the production phase, both drinking and beak trimming systems do not affect performance and egg quality of Japanese quails.

A 112-day trial was carried out to evaluate the effect of dietary calcium level and limestone particle size on the egg quality of 288 Hy-Line Brown semi-heavy layers, with 83 weeks of age at the beginning of the experiment. A completely randomized experimental design was applied in a 2x3 factorial arrangement, with two dietary calcium levels (3.5 and 4.0%) e three limestone particle size compositions (100% fine limestone (FL), with 0.185mm; 30% coarse limestone (CL), with 2.83mm, + 70% FL, with 0.185mm; and 50% CL, with 2.83mm, + 50% FL, with 0.185mm), with six replicates of eight birds each. Mean geometric diameter and in-vitro solubility of the limestone sources were, respectively, 0.185mm and 18.7% for the fine limestone, and 2.83mm and 10.5% for the coarse limestone. At the end of each 28-day period, 72 eggs per treatment were used to determine egg specific gravity, yolk percentage, albumen percentage, eggshell percentage, yolk index, Haugh units, eggshell thickness, and eggshell breaking strength. There was no influence of the treatments on the evaluated parameters. It was concluded that feeding the level of 3.5% calcium usually recommended for layers in their first laying cycle, and the substitution of up to 50% fine limestone by coarse limestone in the feed of semi-heavy commercial Hy-Line Brown layers in their second laying cycle can be applied with no impairment of egg quality.

Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T18:40:13Z No. of bitstreams: 1 S1516-635X2008000100002.pdf: 208821 bytes, checksum: b4607451953d8c853cb17165e405ef2c (MD5) Made available in DSpace on 2013-08-22T18:40:13Z (GMT). No. of bitstreams: 1 S1516-635X2008000100002.pdf: 208821 bytes, checksum: b4607451953d8c853cb17165e405ef2c (MD5) Previous issue date: 2008-03-01 Made available in DSpace on 2013-09-30T19:25:29Z (GMT). No. of bitstreams: 2 S1516-635X2008000100002.pdf: 208821 bytes, checksum: b4607451953d8c853cb17165e405ef2c (MD5) S1516-635X2008000100002.pdf.txt: 20131 bytes, checksum: 406b3cf9264ff397b95f467d88ab2f36 (MD5) Previous issue date: 2008-03-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T13:41:01Z No. of bitstreams: 2 S1516-635X2008000100002.pdf: 208821 bytes, checksum: b4607451953d8c853cb17165e405ef2c (MD5) S1516-635X2008000100002.pdf.txt: 20131 bytes, checksum: 406b3cf9264ff397b95f467d88ab2f36 (MD5) Made available in DSpace on 2014-05-20T13:41:01Z (GMT). No. of bitstreams: 2 S1516-635X2008000100002.pdf: 208821 bytes, checksum: b4607451953d8c853cb17165e405ef2c (MD5) S1516-635X2008000100002.pdf.txt: 20131 bytes, checksum: 406b3cf9264ff397b95f467d88ab2f36 (MD5) Previous issue date: 2008-03-01 The experiment was carried out in the experimental poultry house of the Research and Development Unit of Brotas of Agência Paulista de Tecnologia dos Agronegócios do Centro-Oeste, SP, Brazil. The objective of the study was to evaluate forced-molting methods and their effects on body weight, egg production, feed intake, and mortality, as well as bird performance during the second laying cycle. A total number of 400 65-week-old Japanese quails was distributed in a completely randomized experimental design into five treatments, with four replicates of 20 birds each. The following treatments were applied: T1= not submitted to forced molting, T2= 01 day of fasting + 13 days receiving 15g feed/bird/day (1F+R), T3= 02 days of fasting + 12 days receiving 15g feed/bird/day (2F+R), T4= 03 days of fasting + 11 days receiving 15g feed/bird/day (3F+R), and T5= 3 days of fasting and fed ad libitum thereafter (3F+AL). Significant differences were detected among treatments. When submitted to 3 days of fasting followed by ad libitum feeding, birds presented complete body weight recovery. No egg production percentage differences were detected in birds submitted to forced molting. UNESP FMVZ UNESP FMVZ Dept. of Animal Production UPD Brotas APTA SAA UNESP FMVZ UNESP FMVZ Dept. of Animal Production

INTRODUCTIONThis experiment was carried out at the at the poultry sector of theSchool of Veterinary Medicine and Animal Science – UNESP, Botucatucampus, and aimed at evaluating the effect of the inclusion of flavonoidsalong with mannan oligosaccharides (MOS) as compared to otheradditives on the performance, carcass and parts yields, and meat qualityof broilers reared from 1 to 42 days of age. A total number of 1500Cobb broilers were distributed according to a completely randomizedexperimental design into five treatments, with six replicates of 50 birdseach. Treatments consisted of a control group, probiotic 1, probiotic 2,antibiotic, and flavonoids+MOS. For the period of 1 to 42 days of age,there were no differences among treatments as to daily weight gain,feed intake, mortality, and final body weight, but a significant differencewas found for feed conversion ratio for the flavonoids+MOS treatment.Carcass and parts yields were not significantly influenced by thetreatments. Tbars number, which indicates meat fat oxidation index,was significantly different in both refrigerated and frozen meat. Thelowest oxidation index was obtained with the flavonoids+MOStreatments. Under the conditions of the present study, thesupplementation of broiler diets with flavonoids+MOS was effective.INTRODUCTIONBrazil is presently the world largest exporter of poultry meat. Brazilianpoultry meat production chain generates more the US$10 billionannually, and more than one million direct and indirect job positions(Sbrissia, 2005).One of the consequences of the increase in poultry production wasthe use of additives in animal nutrition to maximize performance indexes.Poultry production is presently highly dependent on the use of growthpromoter to maintain high productivity levels. However, there is anincreasing search for alternatives to practices that may pose risks tothe consumers’ health (Miltenburg, 2000).The global concern with food safety is based on the possibility of theselection of bacteria resistant to antibiotics, which would be caused bythe indiscriminate use of antibiotics used as growth promoters (PalermoNeto, 2002).In the European Union, the ban of the use of antibiotic growthpromoters was effective since January 1

Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T18:40:10Z No. of bitstreams: 1 S1516-635X2006000300002.pdf: 82903 bytes, checksum: 0d7df51a2b9cbcfa7a882c33cedaa818 (MD5) Made available in DSpace on 2013-08-22T18:40:10Z (GMT). No. of bitstreams: 1 S1516-635X2006000300002.pdf: 82903 bytes, checksum: 0d7df51a2b9cbcfa7a882c33cedaa818 (MD5) Previous issue date: 2006-09-01 Made available in DSpace on 2013-09-30T19:25:21Z (GMT). No. of bitstreams: 2 S1516-635X2006000300002.pdf: 82903 bytes, checksum: 0d7df51a2b9cbcfa7a882c33cedaa818 (MD5) S1516-635X2006000300002.pdf.txt: 16686 bytes, checksum: 669878f336d80c4fd162f22e7b7adc1d (MD5) Previous issue date: 2006-09-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T13:40:59Z No. of bitstreams: 2 S1516-635X2006000300002.pdf: 82903 bytes, checksum: 0d7df51a2b9cbcfa7a882c33cedaa818 (MD5) S1516-635X2006000300002.pdf.txt: 16686 bytes, checksum: 669878f336d80c4fd162f22e7b7adc1d (MD5) Made available in DSpace on 2014-05-20T13:40:59Z (GMT). No. of bitstreams: 2 S1516-635X2006000300002.pdf: 82903 bytes, checksum: 0d7df51a2b9cbcfa7a882c33cedaa818 (MD5) S1516-635X2006000300002.pdf.txt: 16686 bytes, checksum: 669878f336d80c4fd162f22e7b7adc1d (MD5) Previous issue date: 2006-09-01 Three experiments were carried out to analyze the performance and egg quality of Japanese quails throughout the day when submitted to different lighting programs. In each experiment, birds were submitted to a period of 28 days for adaptation to the lighting program. During the following three days, each day - from 7 am to 7 pm or 9 pm - was divided into six or seven periods of two hours each, and the remaining hours corresponded to another single period. All birds were submitted to the same management practices, and received water and feed ad libitum. The experimental diet was formulated according to NRC (1994) standards. It was observed lower feed intake in the period of 9 pm to 7 am, and a higher incidence of lay from 3 pm to 7 pm, as opposite to hens, which peak of egg laying occurs during the morning. Some controversial results were found among experiments as to eggshell quality during the different periods of the day. Variation on the lighting program had little influence on the other performance and egg quality parameters. UNESP FMZ UNESP FMZ

Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T18:55:45Z No. of bitstreams: 1 S0102-09352006000400026.pdf: 176845 bytes, checksum: 1f30aaea035944be32dbbfeba1e24b19 (MD5) Made available in DSpace on 2013-08-22T18:55:45Z (GMT). No. of bitstreams: 1 S0102-09352006000400026.pdf: 176845 bytes, checksum: 1f30aaea035944be32dbbfeba1e24b19 (MD5) Previous issue date: 2006-08-01 Made available in DSpace on 2013-09-30T19:48:57Z (GMT). No. of bitstreams: 2 S0102-09352006000400026.pdf: 176845 bytes, checksum: 1f30aaea035944be32dbbfeba1e24b19 (MD5) S0102-09352006000400026.pdf.txt: 32188 bytes, checksum: b80d8c0026b34a7c0284d85849352b34 (MD5) Previous issue date: 2006-08-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T13:40:55Z No. of bitstreams: 2 S0102-09352006000400026.pdf: 176845 bytes, checksum: 1f30aaea035944be32dbbfeba1e24b19 (MD5) S0102-09352006000400026.pdf.txt: 32188 bytes, checksum: b80d8c0026b34a7c0284d85849352b34 (MD5) Made available in DSpace on 2014-05-20T13:40:55Z (GMT). No. of bitstreams: 2 S0102-09352006000400026.pdf: 176845 bytes, checksum: 1f30aaea035944be32dbbfeba1e24b19 (MD5) S0102-09352006000400026.pdf.txt: 32188 bytes, checksum: b80d8c0026b34a7c0284d85849352b34 (MD5) Previous issue date: 2006-08-01 Foram utilizados 1600 pintos de corte de um dia de idade, distribuídos em delineamento, em blocos ao acaso, com esquema fatorial 4×2 (quatro linhagens, sendo uma delas comercial (Ross-308) e as demais específicas para a produção colonial (Caipirinha, Pescoço Pelado e Paraíso Pedrês) e dois sistemas de criação (confinado e com acesso a piquete), com quatro repetições de 50 aves cada. A ração não continha promotores químicos de crescimento e produtos de origem animal. Avaliaram-se o ganho de peso, o consumo de ração, a conversão alimentar, a mortalidade e os rendimentos de carcaça e das partes (peito, pernas, asas e dorso) aos 56, 63, 70, 77 e 84 dias de idade. O comprimento e a porcentagem (em relação ao peso vivo) dos intestinos e o peso e a porcentagem (em relação ao peso vivo) do fígado, moela e pâncreas foram avaliados aos 84 dias de idade. Houve efeito (P0.05) among production systems were observed. UNESP FMVZ UNESP Faculdade de Medicina Veterinária e Zootecnia APTA Unidade de Pesquisa de Brotas UNESP FMVZ UNESP Faculdade de Medicina Veterinária e Zootecnia

Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T19:06:47Z No. of bitstreams: 1 S1516-35982005000400029.pdf: 227797 bytes, checksum: 1be3328e833e4498c5312485fd0d5465 (MD5) Made available in DSpace on 2013-08-22T19:06:47Z (GMT). No. of bitstreams: 1 S1516-35982005000400029.pdf: 227797 bytes, checksum: 1be3328e833e4498c5312485fd0d5465 (MD5) Previous issue date: 2005-08-01 Made available in DSpace on 2013-09-30T20:11:12Z (GMT). No. of bitstreams: 2 S1516-35982005000400029.pdf: 227797 bytes, checksum: 1be3328e833e4498c5312485fd0d5465 (MD5) S1516-35982005000400029.pdf.txt: 40022 bytes, checksum: 984653347bf65c4642544b5c7fe692bf (MD5) Previous issue date: 2005-08-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T13:40:56Z No. of bitstreams: 2 S1516-35982005000400029.pdf: 227797 bytes, checksum: 1be3328e833e4498c5312485fd0d5465 (MD5) S1516-35982005000400029.pdf.txt: 40022 bytes, checksum: 984653347bf65c4642544b5c7fe692bf (MD5) Made available in DSpace on 2014-05-20T13:40:56Z (GMT). No. of bitstreams: 2 S1516-35982005000400029.pdf: 227797 bytes, checksum: 1be3328e833e4498c5312485fd0d5465 (MD5) S1516-35982005000400029.pdf.txt: 40022 bytes, checksum: 984653347bf65c4642544b5c7fe692bf (MD5) Previous issue date: 2005-08-01 Um experimento foi realizado para se avaliar a influência das densidades da gaiola sobre o desempenho de poedeiras semi-pesadas em diferentes fases de criação (cria, recria e produção) e pesquisar seus efeitos sobre o desempenho das aves na fase seguinte. Na fase de cria (0 a 6 semanas), 804 pintinhas da linhagem Isa Brown foram distribuídas em gaiolas medindo 100 x 80 x 35 cm, em delineamento experimental inteiramente casualizado, com quatro tratamentos (29, 32, 35 e 38 aves por gaiola ou 275,86; 250,00; 228,57 e 210,52 cm²/ave) e quatro repetições por tratamento. Não houve diferenças significativas para ganho de peso, consumo de ração, conversão alimentar e uniformidade nas densidades utilizadas na fase de cria. Na fase de recria (6 a 16 semanas), foram utilizadas 720 aves, alojadas em gaiolas medindo 100 x 50 x 50 cm, em delineamento experimental inteiramente casualizado, com 12 tratamentos, distribuídos em esquema fatorial 4 x 3 (densidades na fases de cria e recria), correspondendo a 10, 12 e 14 aves por gaiola, ou seja, 500,00; 416,67 ou 357,14 cm²/ave, com quatro repetições. Não foram observadas diferenças significativas para ganho de peso, consumo de ração, conversão alimentar e uniformidade nas densidades utilizadas nesta fase. Na fase de produção, 540 aves foram alojadas em gaiolas com dimensões de 100 x 45 x 45 cm, em delineamento inteiramente ao acaso, com nove tratamentos, distribuídos em esquema fatorial 3 x 3 (densidades na recria e na produção), com 8, 10 e 12 aves por gaiola, correspondendo a 562,15; 450,00 e 375,00 cm²/ ave, com cinco repetições. Observaram-se efeitos significativos da densidade na gaiola apenas para peso dos ovos e consumo de ração. Para as condições de realização desta pesquisa, pode-se afirmar que as densidades utilizadas nas três fases de criação não prejudicaram os parâmetros de produção estudados. This trial was conducted to evaluate the effect of different stocking densities on performance of caged layers during the growing and laying periods and to verify the effects in the next phase. In the growing period (0-6 weeks), eight hundred and four chicks (Isa Brown ) were assigned to 100 x 80 x 35 cm cages, according to a completely randomized design, with four treatments (275.86, 250.00, 228.57, and 210.52 cm² per bird) and four replicates. No significant effects of treatments on weight gain, feed intake, feed conversion and uniformity were observed during the growing period. In the 6-16 w period, 720 pullets were randomly assigned to 100 x 50 x 50 cm cages, according to a completely randomized design of 4 x 3 factorial arrangement (four densities from 0-6 weeks and three densities from 6-16 weeks), with different treatments (500.00, 416.67, and 357.14 cm² per bird) and four replicates. No significant differences among treatments in the 6-16 w period on weight gain, feed intake, feed conversion and uniformity were observed. In the laying phase, 540 laying hens were randomly assigned to 100 x 45 x 45 cm cages, according to a completely randomized design of 3 x 3 factorial arrangement (three stocking densities in the 6-16 w periodand three caging densities in the laying phase), with different treatments (562.15, 450.00, and 375.00 cm² per hen) and five replicates. Significant effects of cage density on egg weight and feed intake were detected. No significant effects of cage density on bird performance in the growing and laying periods were observed. UNESP FMVZ UNESP FMVZ Faculdade de Medicina Veterinária e Zootecnia Agência Paulista de Tecnologia dos Agronegócios UPD Unesp Instituto de Biociências UNESP FMVZ UNESP FMVZ Faculdade de Medicina Veterinária e Zootecnia Unesp Instituto de Biociências

This work aimed to evaluate the effects of probiotic associated to prebiotic on performance, carcass and cut yields, qualitative traits of meat, development and score of lesions due to coccidiosis in digestive tract of broiler chickens raised in a free-range system during 85 days. One thousand, six hundred and ninety-six day-old male broiler chicks from naked-neck ISA S757-N Label Rouge line were used in a randomized block design with factorial scheme of 4x2 and four repetitions. The effect of four additive (1 - biologic promoter + coccidiosis vaccine; 2 - biologic promoter + anti-coccidiosis; 3 - chemical promoter + coccidiosis vaccine; 4 - chemical promoter + anti-coccidiosis) and two breeding systems from 35th day of age (one with no-access to pasture or confined and the other with free-access to pasture or semi-confined) on performance parameters, carcass and cut yields, qualitative meat traits, coccidiosis development and lesions in digestive tract were evaluated. There was effect (p