DESEMPENHO E PARÂMETROS REPRODUTIVOS DE DIFERENTES LINHAGENS DE CODORNAS JAPONESAS (Coturnix coturnix japonica)

• Autor(a) principal: GOMES, Natali Almeida
• Data de Publicação: 2008
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFG
• Texto Completo: http://repositorio.bc.ufg.br/tede/handle/tde/906
• topic: codorniz; incubação; reprodução; zootécnico; 1. Codornas Reprodução; incubation; japanese quail; performance; reproduction; CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::PRODUCAO ANIMAL

It was the objective of this study to evaluate the performance and reproductive parameters of different genetic groups of japanese quails between six and 26 weeks of age. There were used 384 japanese quails, assigned according to the experimental design (ramdomized blocks), considering the initial live weight of the birds as blocks in the beginning of the experiment. The treatments were three genetic groups with eight replicates, in a total of 48 experimental units with eight birds in each experimental unit (two males and six female). The birds were fed rations according to recommendations of NRC (1994), having soybean meal and ground corn as the main components. The variables of performance were studied every 14 days and three incubation trials were done with 15, 24 and 33 weeks of age. For the statistical analysis the proc GLM of SAS software was used and the means were compared by the t Student test. In each incubation study the completely ramdomized blocks experimental design was used, considering the incubating machines as blocks, with 70 replicates per treatment and one egg as the experimental unit. The parameters evaluated were the egg weight, hatchability, chick weight at hatching, weight loss and weight after six hours of fasting. The results were submitted to variance analysis and the means compared by the t Student test (5% of probability). The genetic groups presented differences among each other for the live body weight in the beginning of production, age at 50% of of productiontwere different to body weight at the beggining and age at 50% of production, where the commercial parent line obtained the best performance. The parameters peak persistence, eggs production, feed intake, viability and beak behavior did not present differences among the genetic groups. The live body weight influenced the egg weight. In the incubation trials the commercial parent line presented more weight of the incubating egg and more weight of the chicks at hatching. It was concluded in the present study that there are statistical differences on the performance and incubating parameters among genetic groups of japanese quails.