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A Study On The Effects Of Different Photperiods On The Performance Of Coturnix Coturnix Japonica (Japanese Quails)

By: Khalid Mahmood | Ch Muhammad Saleem.
Contributor(s): Dr Muhammad Aslam Bhatti | Dr Saghir.
Material type: materialTypeLabelBookPublisher: 1985Subject(s): Department of Poultry ProductionDDC classification: 0784,T Dissertation note: The study was aimed to find out the effect of different photoperiods on body weight gain, feed consumption, feed conversion ratio, age at first egg laid, mortality and dressing percentage of Japanese quails (coturnix coturnix Japonica) . The photoperiods provided were natural day light, 6 hours light and 18 hours darkness, 10 hours light and 14 hours darkness and 14 hours light and 10 hours darkness to groups A, B, C and D respectively. One hundred and eighty, one day old quail chicks were divided into four groups comprising 45 birds each. These groups were further sub-divided into three replicates of 15 birds each. They were provided 25 sq. inches floor space per bird and fed ad-libiturn on a ration containing 26% protein throughout the study period of 70 days. Feeding, watering, environmental and manage mental conditions were made identical for all the birds. The average live weight of the quails recorded at the end of the 10th week was 161.25 gms., 134.52 gms., 165.59 gms., and 186.33 gms., with feed consumption of 870, 699, 882, and 1031 gms., for the groups A, B, C and D respectively. A highly significant difference was observed for weight gain among all the groups except groups A and C. For feed consumption a highly significant difference (P/0.0l) was observed in groups B and D while the difference in groups A and D was significant (PL0.05) and no significant difference was noticed in groups A and C, because of almost equal hours of light. The feed conversion ratio was 5.68, 5.53, 5.60 and 5.79 for groups A, B, C and D respectively, and no significant difference was observed among all the groups. The age in days at which the first egg laid was 55, 69, 58 and 51 in groups A, B, C and D respectively. The mortality percentage was 16.00, 33.55, 13.33 and 11.00 and the mean dressing percentages recorded at the end of experiment were 62.5, 63.0, 62.7 and 64.0 for groups A, B, C and D respectively. No significant difference was observed for dressing percentage in all the groups. CONCLUSION From the results of the present study it was concluded that Japanese quails can be reared economically and efficiently under natural day light throughout the year in Punjab for table purpose. It is advisable to market the broiler quails at 6 weeks of age as keeping them longer is uneconomical. However, if the quails are to be kept for breeding purpose, at least 14 hours continuous light per day should be given in order to attain early sexual maturity and onset of egg production. It is suggested that the study should be extended upto two successive generations to assess the productive potential of Japanese quails in detail under local environmental conditions of Pakistan.
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Thesis Thesis UVAS Library
Thesis Section
Veterinary Science 0784,T (Browse shelf) Available 0784,T
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The study was aimed to find out the effect of different photoperiods on body weight gain, feed consumption, feed conversion ratio, age at first egg laid, mortality and dressing percentage of Japanese quails (coturnix coturnix Japonica) . The photoperiods provided were natural day light, 6 hours light and 18 hours darkness, 10 hours light and 14 hours darkness and 14 hours light and 10 hours darkness to groups A, B, C and D respectively.

One hundred and eighty, one day old quail chicks were divided into four groups comprising 45 birds each. These groups were further sub-divided into three replicates of 15 birds each. They were provided 25 sq. inches floor space per bird and fed ad-libiturn on a ration containing 26% protein throughout the study period of 70 days. Feeding, watering, environmental and manage mental conditions were made identical for all the birds. The average live weight of the quails recorded at the end of the 10th week was 161.25 gms., 134.52 gms., 165.59 gms., and 186.33 gms., with feed consumption of 870, 699, 882, and 1031 gms., for the groups A, B, C and D respectively. A highly significant difference was observed for weight gain among all the groups except groups A and C. For feed consumption a highly significant difference (P/0.0l) was observed in groups B and D while the difference in groups A and D was significant (PL0.05) and no significant difference was noticed in groups A and C, because of almost equal hours of light. The feed conversion ratio was 5.68, 5.53, 5.60 and 5.79 for groups A, B, C and D respectively, and no significant difference was observed among all the groups.

The age in days at which the first egg laid was 55, 69, 58 and 51 in groups A, B, C and D respectively. The mortality percentage was 16.00, 33.55, 13.33 and 11.00 and the mean dressing percentages recorded at the end of experiment were 62.5, 63.0, 62.7 and 64.0 for groups A, B, C and D respectively. No significant difference was observed for dressing percentage in all the groups.

CONCLUSION

From the results of the present study it was concluded that Japanese quails can be reared economically and efficiently under natural day light throughout the year in Punjab for table purpose. It is advisable to market the broiler quails at 6 weeks of age as keeping them longer is uneconomical.

However, if the quails are to be kept for breeding purpose, at least 14 hours continuous light per day should be given in order to attain early sexual maturity and onset of egg production.

It is suggested that the study should be extended upto two successive generations to assess the productive potential of Japanese quails in detail under local environmental conditions of Pakistan.

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