| Texto completo | |
| Autor(es): Mostrar menos - |
Pelicia, V. C.
[1]
;
Araujo, P. C.
[2]
;
Luiggi, F. G.
[2]
;
Stradiotti, A. C.
[2]
;
Denadai, J. C.
[1]
;
Sartori, J. R.
[2]
;
Pacheco, P. D. G.
[2]
;
Dornelas, L. C.
[2]
;
Silva, E. T.
[1]
;
Souza-Kruliski, C. R.
[1]
;
Pimenta, G. E. M.
[2]
;
Ducatti, C.
[1]
Número total de Autores: 12
|
| Afiliação do(s) autor(es): | [1] Univ Estadual Paulista, UNESP, Inst Biociencias Botucatu, Ctr Isotopos Estaveis, Campus Botucatu, Sao Paulo - Brazil
[2] Univ Estadual Paulista, UNESP, Dept Melhoramento & Nutr Anim, Fac Med Vet & Zootecnia, Campus Botucatu, Sao Paulo - Brazil
Número total de Afiliações: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | LIVESTOCK SCIENCE; v. 210, p. 8-14, APR 2018. |
| Citações Web of Science: | 0 |
| Resumo | |
The aim of this study was to estimate the metabolic rate of broiler tissues by assessing carbon turnover in different growth phases by using the stable isotope technique and by evaluating the natural changes in Carbon-13 (C-13) between C-3 and C-4 cycle plants. Six-hundred 1-day-old broiler chicks were divided into six groups and subjected to dietary changes containing different isotopic values at 7, 14, 21, 28, and 35 days of age. Birds of Group 1 received diets composed predominantly of C-3 cycle plants shortly after accommodation, while birds of other groups remained predominantly fed with C-4 diet. The diet of Group 2 was mainly replaced by C-3 diet on the 7th day of age. Group 3 started to receive C-3 diet on the 14th day of age, whereas the diet of Group 4 was replaced on the 21st, Group 5 on the 28th. In Group 6, the substitution occurred on the 35th day of age. Samples of the pectoral muscle, keel, tibia, legs muscle, intestinal mucosa, blood, plasma, and feathers were collected. Carbon isotope ratios were determined by mass-spectrometry of isotope ratios. To measure the speed of carbon substitution after a set interval (turnover), a time exponential function was employed and obtained by exponential equations of the first order calculated with Minitab 16 software. The carbon half-life varied from 1.78 to 8.20 days for the pectoral muscle, from 1.91 to 12.24 days for the keel, from 2.32 to 10.71 days for the tibia, from 1.87 to 9.43 days for the leg muscle, from 0.8 to 1.58 days for the intestinal mucosa, from 0.64 to 1.71 days for the plasma, from 2.61 to 11.07 days for blood, and from 1.84 to 28.41 days for the feathers during the total growth phase. With the exception of tibia and blood, all other tissues presented a high metabolic rate in the first week of the broilers' life. The metabolic rate of tissues is faster in younger animals, and the metabolism slows down as the broilers get older. The metabolic rates in the pectoral muscle, keel, tibia, and feathers decreased with age, whereas those of the plasma and intestinal mucosa were high in all evaluated periods; thus, these tissues can be used to study traceability of feed at all stages of the broilers' life. (AU) | |
| Processo FAPESP: | 11/17406-4 - Turnover do carbono-13 em tecidos de frangos de corte |
| Beneficiário: | Vanessa Cristina Pelícia |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 08/57411-4 - Isótopos estáveis ambientais em zootecnia |
| Beneficiário: | Carlos Ducatti |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |