1Animal Reproduction Division, Indian Veterinary Research Institute, Izatnagar-243 122, Uttar Pradesh, India
2UBKV, Pundibari, Coochbehar-736165, West Bengal, India
3NRC on Pig, Rani, Guwahati, Assam, India
4Department of Gynaecology, WB University of Animal and Fishery Science, K.B. Sarani, Kolkata-37, West Bengal, India
5Agricultural Technology Application Research Institute, Umroi Road, Umiam-793103, Meghalaya, India
ICAR Research Complex for NEH Region, Nagaland Centre, Jharnapani, Medziphema-797 106, Nagaland, India
*Corresponding author's e-mail: drmanas01@gmail.com
Online published on 17 September, 2018.
A study was undertaken to evaluatethe seasonal influenceon performance of Vanaraja(n=3924) and Gramapriya (n=2227) maintained in five different batches during 2011–14. Better growth was observed in summer during brooding. At brooding, mortality was significantly higher during winter in Vanaraja and during summer in Gramapriya. The egg production was higher when birds started laying in winter than in summer. The overall Hen Day Egg Production (HDEP) was higher in Vanaraja (p<0.01) than the Gramapriya. The fertility level varied between 68 to 90% in both varieties. The hatchability percentage on fertile egg set (FES) varied within the range of 70 to 90. It was concluded that better egg production performance could be obtained from Vanaraja birds, raised in summer and those initiated laying in winter. Therefore, the seasonal factors should be taken care of while raising parent line to achieve optimum production.
Egg production, Growth, Gramapriya, Season, Vanaraja
