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Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T18:40:11Z No. of bitstreams: 1 S1516-635X2006000400004.pdf: 534893 bytes, checksum: ea85135a4efa4519a51dbda446b12c8b (MD5) Made available in DSpace on 2013-08-22T18:40:11Z (GMT). No. of bitstreams: 1 S1516-635X2006000400004.pdf: 534893 bytes, checksum: ea85135a4efa4519a51dbda446b12c8b (MD5) Previous issue date: 2006-12-01 Made available in DSpace on 2013-09-30T19:25:23Z (GMT). No. of bitstreams: 2 S1516-635X2006000400004.pdf: 534893 bytes, checksum: ea85135a4efa4519a51dbda446b12c8b (MD5) S1516-635X2006000400004.pdf.txt: 16515 bytes, checksum: 6a4190a40c4ca055608da64ac6ffb07f (MD5) Previous issue date: 2006-12-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T13:15:53Z No. of bitstreams: 2 S1516-635X2006000400004.pdf: 534893 bytes, checksum: ea85135a4efa4519a51dbda446b12c8b (MD5) S1516-635X2006000400004.pdf.txt: 16515 bytes, checksum: 6a4190a40c4ca055608da64ac6ffb07f (MD5) Made available in DSpace on 2014-05-20T13:15:53Z (GMT). No. of bitstreams: 2 S1516-635X2006000400004.pdf: 534893 bytes, checksum: ea85135a4efa4519a51dbda446b12c8b (MD5) S1516-635X2006000400004.pdf.txt: 16515 bytes, checksum: 6a4190a40c4ca055608da64ac6ffb07f (MD5) Previous issue date: 2006-12-01 This experiment aimed at evaluating the effects of the interactions between aflatoxin (500 or 250 ppb) and ochratoxin (500 or 250 ppb), and the possible benefits of adding yeast cell wall to prevent the effects of these mycotoxins in broiler chickens. Relative organ weight gain and live performance were evaluated at 21 and 42 days of age. Results indicated that at the levels of mycotoxins included in the experimental diets, ochratoxin reduced feed intake and body weight gain, and aflatoxin only affect feed intake of 21-day-old birds. No interaction was observed between aflatoxin and ochratoxin at the levels used in experimental study. Yeast cell wall did not significantly reduced the deleterious effects of ochratoxins. No significant differences were observed in relative organ weight gain. Yeast cell wall improved feed conversion ratio when birds were fed either contaminated or non-contaminated feeds. Universidade Federal de Uberlândia (UFU) Unesp Faculdade de Ciências Agrárias e Veterinárias Unesp Faculdade de Ciências Agrárias e Veterinárias

This study was conducted to evaluate the performance and carcass and breast yields of broilers fed two different energy levels (3,200 or 2,900 kcal ME/kg) and two ways of expressing amino acid requirements (total n TAA or digestible n DAA) between 21 and 42 days of age. The results showed that broilers fed the diet containing 3,200 kcal ME/kg had higher weight gain (P=0.015), better feed conversion (P=0.001), and higher abdominal fat deposition (P=0.001) as compared to those fed the diet containing 2,900 kcal ME/kg. Diets formulated on DAA basis promoted higher weight gain (P=0.043), better feed conversion (P=0.010) and better conversion of ME intake into weight gain (P=0.007) as compared to those formulated on TAA basis. The results of this study suggest that formulation based on DAA is necessary if the diets contain protein sources that are not reliable in terms of amino acid digestibility. The response to formulation based on DAA was minimized when birds received the low energy level diet (2,900 kcal ME/kg).

Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T19:08:08Z No. of bitstreams: 1 S1516-635X2002000200008.pdf: 85310 bytes, checksum: 3da6287d008d586f4fe60698fe175473 (MD5) Made available in DSpace on 2013-08-22T19:08:08Z (GMT). No. of bitstreams: 1 S1516-635X2002000200008.pdf: 85310 bytes, checksum: 3da6287d008d586f4fe60698fe175473 (MD5) Previous issue date: 2002-05-01 Made available in DSpace on 2013-09-30T20:13:02Z (GMT). No. of bitstreams: 2 S1516-635X2002000200008.pdf: 85310 bytes, checksum: 3da6287d008d586f4fe60698fe175473 (MD5) S1516-635X2002000200008.pdf.txt: 15330 bytes, checksum: bc2eda80968e451e820204c5289c7104 (MD5) Previous issue date: 2002-05-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T13:28:40Z No. of bitstreams: 2 S1516-635X2002000200008.pdf: 85310 bytes, checksum: 3da6287d008d586f4fe60698fe175473 (MD5) S1516-635X2002000200008.pdf.txt: 15330 bytes, checksum: bc2eda80968e451e820204c5289c7104 (MD5) Made available in DSpace on 2014-05-20T13:28:40Z (GMT). No. of bitstreams: 2 S1516-635X2002000200008.pdf: 85310 bytes, checksum: 3da6287d008d586f4fe60698fe175473 (MD5) S1516-635X2002000200008.pdf.txt: 15330 bytes, checksum: bc2eda80968e451e820204c5289c7104 (MD5) Previous issue date: 2002-05-01 Foram conduzidos dois experimentos, utilizando-se 712 pintos de corte para avaliar o efeito do balanço eletrolítico (Na+K-Cl) em rações pré-iniciais (1-7 dias) de frangos de corte. As rações à base de milho e farelo de soja, com 21,5 % de proteína e 2.900 kcal EM/kg, foram oferecidas à vontade. No experimento I, o nível de K foi fixado e os níveis de Na e Cl foram manipulados, em 4 tratamentos com 8 repetições de 16 aves cada. No experimento II, níveis mais elevados de Na e K foram usados, com 4 tratamentos e 5 repetições de 10 aves cada. em ambos os experimentos, os balanços eletrolíticos foram de 40; 140; 240 e 340 mEq/kg de ração. O balanço eletrolítico causou um efeito quadrático no ganho de peso e na conversão alimentar e um aumento linear no consumo de alimento quando o balanço eletrolítico foi aumentado pela suplementação de Na, indicando que esse íon estimula o consumo de alimento das aves nesse período. Porém, o consumo de alimento foi máximo em 202 mEq/kg, quando os níveis de K e Na foram simultaneamente aumentados na dieta, indicando que o limite superior de consumo de alimento é deprimido em função do K em excesso. O balanço eletrolítico ideal foi entre 246 e 277 mEq/kg obtidos pela manipulação dos níveis de Na e Cl. Two experiments were carried out using 712 day-old chicks to evaluate the electrolytic balance (Na+K-Cl) in pre-starter (1-7 days) broiler diets. The feed, based on corn and soybean meal with 21.5 % protein and 2,900 kcal ME/kg, was offered ad libitum. In experiment I, K level was fixed, and Na and Cl levels were changed, using four 4 treatments and eight replicates of 16 birds. In experiment II, increasing levels of Na and K were used, with a total of four treatments and five repetitions of 10 birds. In both experiments, the dietary electrolytic balance was 40; 140; 240 and 340 mEq/kg. Electrolytic balance caused a quadratic effect on weight gain and feed:gain ratio, and a linear increase in feed intake when the electrolytic balance was increased by the single supplementation of Na, indicating that this ion stimulates feed intake of birds at this stage. However, feed intake was maximum for 202 mEq/kg, when K and Na levels were concurrently increased in the diet, indicating that there is a limit over which feed intake is depressed as a function of excessive K. The ideal electrolytic dietary balance was between 246 and 277 mEq/kg, obtained by the manipulation of Na and Cl levels. Unesp FCAV Universidade Federal de Uberlândia (UFU) Depto. de Fisiologia Unesp FCAV

Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T19:08:05Z No. of bitstreams: 0 Made available in DSpace on 2013-08-22T19:08:05Z (GMT). No. of bitstreams: 0 Previous issue date: 2000-08-01 Made available in DSpace on 2013-09-30T17:55:40Z (GMT). No. of bitstreams: 0 Previous issue date: 2000-08-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T13:15:44Z No. of bitstreams: 0 Made available in DSpace on 2014-05-20T13:15:44Z (GMT). No. of bitstreams: 0 Previous issue date: 2000-08-01 O objetivo deste trabalho foi investigar o efeito da idade das matrizes pesadas sobre o desenvolvimento do trato gastrointestinal (TGI) dos embriões no terço final do período de incubação, bem como a utilização das reservas do saco vitelino nas 24 h pós-eclosão, em pintos alimentados ou em jejum. Foram utilizados ovos férteis da linhagem Cobb 500, oriundos de matrizes pesadas com 30 e 60 semanas de idade. O desenvolvimento do TGI (proventrículo+moela, segmentos do intestino delgado e saco vitelino) foi estudado entre o 17º e 21º dias de incubação (Experimento 1). Nas 24 h pós-eclosão foi pesquisado o efeito da presença ou não de alimento no lúmen intestinal sobre a utilização das reservas do saco vitelino (Experimento 2). Os achados deste trabalho mostraram que, ao contrário do embrião, o desenvolvimento do intestino delgado e o peso do saco vitelino não sofreram influência da idade das matrizes. Na fase pós-eclosão, na ausência de alimento, o desenvolvimento do intestino delgado foi maior nas matrizes com 60 semanas, sendo dependente do crescimento do jejuno. A presença do alimento no lúmen teve influência na utilização das reservas do saco vitelino apenas nas matrizes com 30 semanas de idade. Os resultados deste experimento mostraram que a idade da matriz é importante fator no desenvolvimento do trato gastrointestinal do embrião, sendo fator relevante no crescimento pós-ecloão dos pintos. This experiment was undertaken with the objective of studying the effect of broiler breeder age on gastrointestinal embryo development starting from the17th day of incubation up to hatching (Experiment 1). Yolk utilization during the first 24 h after hatching in fed and fasted chicks was also investigated (Experiment 2). Fertile eggs (Cobb 500 strain) from broiler breeder aging 30 and 60 weeks were incubated under standard conditions. The findings of this study demonstrated that the development of small intestine and yolk weight in the embryos was not influenced by broiler breeder age. After hatching, the small intestine development was faster for chicks from 60 week-old broiler breeders. In this case, the jejunum growing faster than duodenum and ileum. The presence of feed influenced yolk utilization only in chicks from 30 week-old broiler breeder. This study indicates that broiler breeder age has an important role on embryo gut development and yolk utilization, and is a relevant factor on the chicks growth after hatching. UNESP FCAV UNESP FCAV Depto. de Morfologia e Fisiologia Animal UNESP FCAV UNESP FCAV Depto. de Morfologia e Fisiologia Animal