DESEMPENHO E PARÂMETROS REPRODUTIVOS DE DIFERENTES LINHAGENS DE CODORNAS JAPONESAS (Coturnix coturnix japonica)
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2008-03-28
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Universidade Federal de Goiás
Resumo
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.
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GOMES, Natali Almeida. Performance and reproductive parameters of different strain of japonese quail (coturnix coturnix japonica). 2008. 69 f. Dissertação (Mestrado em Ciências Agrárias - Veterinaria) - Universidade Federal de Goiás, Goiânia, 2008.