Effect of male to female ratio on fertility, hatchability of native fowl in Isfahan province at different ages
2009
Tadayonfar , Saied
This experiment was conducted in order to study different male (M) to female (F) ratios of Isfahan native fowls on their reproductive characteristics. These ratios were 5:1, 7:1 and 9:1, F: M. The experiment lasted 36 weeks and started from 26th week untill 62 th week of age. The experimental featurs measured every 4 weeks. The poultry reared in controlled condition in confined pens and every treatment had 4 replicates. All the roosters and hens had the same age at the beging of experiment. Every week the fertile eggs were collected and then incubated and after hatching the chicks, the unhatched eggs, total hatchability, the hached chick per fertile eggs ratio and mortality rate were evaluated. The results showed that there were no significant differences in fertility between the treatments in different ages. But the highest fertility in 46th week of ages was in 7:1 ratio (95/69%) and the lowest rate was in age of 62 th week for 9:1 ratio (85/18%). The highest hatchability based on total egg incubating was in 46th week of age in 7:1 ratio (88/67%) and the lowest was belonge to 5: 1 in 34th week of ages (17%) because of influenza disease out brake.Hatchability based on the fertile eggs had not any significant differences between treatments for all the different ages. as there is not any significant differences betweens treatments in this experiments from economical view it is suggested ratio 9: 1 female to male to be apply. It is concluded that for most ages 9: 1 female to male treatment had higher hatchability than othertreatments. So this ratio was the best in this experiment.
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