Níveis de energia metabolizável em rações para frangos de corte mantidos em ambiente de alta temperatura

Barbosa, Firmino José Vieira; Lopes, João Batista; Figueirêdo, Agustinho Valente de; Abreu, Márvio Lobão Teixeira de; Dourado, Leilane Rocha Barros; Farias, Leonardo Atta; Pires, João Eduardo Pinto

doi:10.1590/s1516-35982008000500011

Cited by 14 publications

(13 citation statements)

References 6 publications

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“…Meza et al [22] found CB carcass yield of 73.17%. The HB lineage according to Barbosa et al [23] presented 82.71% yield at 49 days of age.…”

Section: Yield -Cutsmentioning

confidence: 99%

Chicken (Gallus gallus domesticus L.) Cuts Yield Specifics of Cobb 500 Slow and Hubbard Flex Hybrids

Soares¹,

Dahlke²,

Netto³

et al. 2017

fph

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Chicken (Gallus gallus domesticus L.) cuts yield of wing (drummette / middle joint / tip), breast (fillet / tenderloin) and leg (drumstick / thigh / feet) of two specific hybrids (Cobb 500 Slow -CB-Slow and Hubbard Flex -HB-Flex) were evaluated. A total of 150 birds of each hybrid (grown in separate sheds under same management) were utilized for the study. The trials were carried out under randomly design with 24 replicated for each lineage. From the data obtained it was observed that the cuts yield of CB-Slow birds was higher for breast when compared to HB-Flex. On the other hand, the HB-Flex birds had higher cut yields for leg (drumstick -meat & bone) and wing (drummette / middle joint / tip). Yields for tenderloin, breast bone and upper drumstick (meat) both hybrids did not show significant differences. The knowledge of specific chicken hybrid cuts differences, enables more accurate choices that best fits the consumer's market needs.

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“…Meza et al [22] found CB carcass yield of 73.17%. The HB lineage according to Barbosa et al [23] presented 82.71% yield at 49 days of age.…”

Section: Yield -Cutsmentioning

confidence: 99%

Chicken (Gallus gallus domesticus L.) Cuts Yield Specifics of Cobb 500 Slow and Hubbard Flex Hybrids

Soares¹,

Dahlke²,

Netto³

et al. 2017

fph

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“…The stress caused by thermal environment influences endocrinology and physiology of the poultry, and, consequently, productivity, by changing their heat exchange with the environment and modify the rate of food consumption, the rate of body weight gain and the nutritional requirements (SOUZA et al, 2011;BARBOSA et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Thermal comfort temperature update for broiler chickens up to 21 days of age

et al. 2013

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Due to changes in genetics and nutrition, as well as in acclimatization of broiler chickens to the Brazilian climate, temperature values currently accepted as optimal may be outdated. The objective of this research was to update the environment temperatures that characterize the thermal comfort for broilers chickens from one to 21 days of age, under Brazilian production conditions. This research was conducted with 600 COBB birds, which were distributed in five growth chambers maintained at different temperatures during the first three weeks of age. During the experimental period, temperature values were progressively reduced, consisting in five treatments: T2724/21, T30/27/24, T33/30/27, T36/33/30 and T39/36/33. It was observed that the birds maintained in the T30 27-24 treatment presented better performance compared to other environment conditions. Based on the obtained regression models, the environment temperature values that provide greater weighing gain for the broiler chicken growth in the initial period were 31.3, 25.5 and 21.8 °C, respectively for the first, second and third week of age.KEYWORDS: thermal stress, aviculture, performance. ATUALIZAÇÃO DAS TEMPERATURAS DE CONFORTO TÉRMICO

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“…The nutritional plans did not affect liver and heart weights (P > 0.05); however, there was a significant effect on liver, gizzard, and small intestine weights. Ribeiro et al (2001), Rocha et al (2003), and Barbosa et al (2008) found no differences in the heart weight of birds under different nutritional plans. Table 10.…”

Section: Resultsmentioning

confidence: 88%

Effect of nutrition on the body temperature and relative organ weights of broilers

Martins

Fernandes

Bueno

et al. 2015

SCA

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The objective of this study was to evaluate the effect of different nutritional plans on the body temperature and organ biometrics in male and female broilers, of two ages. Here, 1,700 birds were used (850 males and 850 females) in a completely randomized design composed of five treatments (-3%, -1.5%, reference, + 1.5% and + 3%), with 10 repetitions, totaling 50 experimental units; the reference treatment based on nutritional and energy levels indicated in previous studies was calculated from this. At 35 and 42 d, the temperatures of the wing, head, shin, back, and cloaca in males and females were measured separately, and the average surface and body temperature were calculated. At 42 d, relative weights of the gizzard, liver, heart, and small intestine were calculated. The temperatures of the wings, back, and cloaca, and consequently the average surface temperature and body temperatures, were not affected by nutritional plans. Effects of increasing the nutritional and energy levels were observed on liver weights, the gizzard, and the small intestine. We conclude that the nutritional plans did not affect body temperature. Males had higher body temperatures than females. Body temperature increased with increase in age, and the increase in the nutritional plans increased liver weight and reduced the gizzard weights. Key words: Animal nutrition, body temperature, digestive system, poultry ResumoObjetivou-se avaliar a temperatura corporal e o peso relativo de órgãos em frangos de corte, machos e fêmeas, em duas idades, submetidos a diferentes planos nutricionais. Foram utilizadas 1700 aves (850 machos e 850 fêmeas) distribuídas em um delineamento inteiramente casualizado, composto de cinco tratamentos (-3%, -1.5%, referência, +1.5% e +3%) com 10 repetições, totalizando 50 unidades experimentais; sendo o tratamento referência baseado nos níveis nutricionais e energéticos recomendados por Rostagno et al. (2011) e os demais calculados a partir deste. Aos 35 e 42 dias de idade foram mensuradas as temperaturas da asa, cabeça, canela, dorso e da cloaca nos machos e fêmeas separadamente, e após calculou-se a temperatura superficial média e corporal. Aos 42 dias de idade também foram calculados os pesos relativos da moela, fígado, coração e intestino delgado. As temperaturas de asa, dorso e cloaca não foram afetadas pelos planos nutricionais, e consequentemente as temperaturas superficial média e corporal. Observou-se efeito do aumento dos níveis nutricionais e energéticos nos pesos do fígado, moela e do intestino delgado. Conclui-se que os planos nutricionais não influenciaram a temperatura corporal. Os machos apresentaram maior temperatura corporal que as fêmeas. A temperatura corporal se elevou conforme aumentou a idade. O aumento dos planos nutricionais aumentou o peso do fígado e reduziu o peso da moela.

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Níveis de energia metabolizável em rações para frangos de corte mantidos em ambiente de alta temperatura

Cited by 14 publications

References 6 publications

Chicken (Gallus gallus domesticus L.) Cuts Yield Specifics of Cobb 500 Slow and Hubbard Flex Hybrids

Chicken (Gallus gallus domesticus L.) Cuts Yield Specifics of Cobb 500 Slow and Hubbard Flex Hybrids

Thermal comfort temperature update for broiler chickens up to 21 days of age

Effect of nutrition on the body temperature and relative organ weights of broilers

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