Table 1.

Annual reproductive performance of the original NMR colonies

	No. of
Colony no.	Litters	Pups born	Pups weaned	Survival rate after weaning (%)
1	2	30	24	80.00
2	3	35	30	85.71
3	3	31	30	96.77
4	4	49	42	85.71
5	4	49	43	87.76