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Carbon turnover in poultry tissues at different growth stages/Turnover de carbono nos tecidos de frangos de corte em diferentes fases de crescimento
The aim of this study was to evaluate carbon turnover on muscle tissue Pectoralis major, keel, tibia and liver of poultry at different life stages using the carbon stable isotopes technique. 216 male chick lings (Cobb) were used. The trial was conduced in a totally random distribution consisting on...
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Published in: | Ciência rural 2014-08, Vol.44 (8), p.1472 |
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Main Authors: | , , , , , , |
Format: | Article |
Language: | Spanish |
Subjects: | |
Online Access: | Get full text |
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Summary: | The aim of this study was to evaluate carbon turnover on muscle tissue Pectoralis major, keel, tibia and liver of poultry at different life stages using the carbon stable isotopes technique. 216 male chick lings (Cobb) were used. The trial was conduced in a totally random distribution consisting on seven treatments with distinct days for diet substitution (0, 7, 14, 21, 28, 35, 42 days old). Either Boltzmann sigmoid regression or the exponential time function were used in order to measure the carbon isotopic turnover in a specific period of time. The half-life were: 2.5; 2.8; 2.9; 4.9; 5.1; 5.5 e 6.0 day on muscle tissue; 2.7; 2.9; 3.1; 4.6; 5.3; 4.1 e 8.0 day on keel; 4.4; 3.6; 5.4; 5.8; 4.3; 5.2 e 6.3 day on tibia and 1.3; 1.9; 1.4; 1.5; 1.9; 1.7 and 2.1 day on liver, for to treatments T1, T2, T3, T4, T5, T6 e T7 respectively. According to the results of this study, it is possible to conclude that the tibia has slowest metabolism and may indicate the isotopic signature of initial diets of poultry culture. The fast metabolism tissue, liver, is appropriated to reflect the diets fed at closer period of evaluation. Key words: half-life, isotopic dilution, isotope 13C. Este trabalho objetivou determinar o turnover do carbono no Pectoralis major, quilha, tibia e figado de frangos de corte em seus diferentes periodos de crescimento, utilizando a tecnica dos isotopos estaveis. Foram utilizados 216pintos de corte, machos, Cobb. O delineamento experimental foi inteiramente casualizado e consistiu de sete tratamentos com dias de substituicao das dietas distintos: 0; 7; 14; 21; 28; 35; 42 dias de idade. Para mensurar o turnover do carbono nos tecidos em determinado intervalo de tempo, foi utilizado o modelo sigmoidal de regressao de Boltzmann ou funcao exponencial do tempo. Os valores de meiasvidas foram: 2,5; 2,8; 2,9; 4,9; 5,1; 5,5 e 6,0 dias para musculo peitoral; 2,7; 2,9; 3,1; 4,6; 5,3; 4,1 e 8,0 dias para quilha; 4,4; 3,6; 5,4; 5,8; 4,3; 5,2 e 6,3 dias para tibia e 1,3; 1,9; 1,4; 1,5; 1,9; 1,7 e 2,1 dias para figado, nos tratamentos T1, T2, T3, T4, T5, T6 e T7, respectivamente. Pode-se concluir que a tibia possui metabolismo lento e pode indicar o sinal isotopico das dietas iniciais da criacao dos frangos de corte; e o figado, metabolismo rapido, indicado para refletir a dieta proxima da fase de avaliacao. Palavras-chave: diluicao isotopica, isotopo 13C, meia-vida. |
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ISSN: | 0103-8478 |
DOI: | 10.1590/0103-8478cr20120962 |