Department of Zoology, D.A.V. P. G. College, Kanpur, U.P.. atulkumarmisra03@gmail.com
A photoperiodic experiment on Coturnix coromandelica, which is commonly known as rain quail was conducted to observe the effect of photoperiodism on the growth and development of testis. The birds were treated with different photoperiodic schedules under the observation of photoperiodic manipulations for 120 days. It is observed that testis of birds grew faster and they became sexually mature early in long term of light/dark schedule i.e. 21hrs. L/3hrs. D and 18hrs. L/6hrs. D in comparison to 3hrs L/21hrs. D. The body weight of the experimental birds was also affected due to response of light. There was no significant change observed in birds of natural day length (N.D.L.) group. The hormonal regulations, growth and development of testis were regulated by different photoperiodic treatments. Short to long and long to short term of light is a controlling factors, which effects body weight, testicular activity and secondary sexual characteristics in birds.
Coturnix coromandelica, natural day length, photoperiodic schedule, testicular activity, hormonal secretions
