Effect of egg size on hatchability, quail size, posthatching growth and egg performance of japanese quails
1996
Arwut Tancho (King Mongkut's Institute of Technology Lat Krabang, Bangkok (Thailand). Faculty of Agricultural Technology. Dept. of Animal Production Technology)
Experiment was carried out to determine the effect of egg size on hatchability chick size, growth rate and egg production of Japanese quails. The study was carried in two phases. The first phase was on the fertile eggs. The total number of 2,400 fertile eggs were grouped in two based on their weight. These two groups were 8.00-10.99 gm and 11.00-13.99 gm. Each group had 4 replications each of which contained 300 eggs and alloted in independent sample. All eggs were incubated at 99.5 deg F and 50-60 per cent RH for 17 days. After incubation, the one-day old quails from each group and each replication were fed with the completed feed containing 24 percent protein during the age of 0-5 weeks. It was found that the larger size eggs showed significantly better hatchability and initial weight of hatching birds. Feed intake average daily gain, feed conversion ratio and cost between 2 groups were not significantly different. The second phase was continued on the 240 female quails of 6 weeks old. The group was alloted into independent samples and divided into 2 groups according to the same egg size as the first phase. All quails were fed with completed feed containing 20 percent protein. After 6-15 weeks, the result showed that the was no significant difference on hatchability between the two groups but there was a tendency that the bird from large egg size gave larger egg weight than the smaller ones.
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