The population genetics of wild chimpanzees in Cameroon and Nigeria suggests a positive role for selection in the evolution of chimpanzee subspecies

Table 3 Summary of demographic parameters for population pairs

Comparison				Migrants per generation*		Population Size*			Population Divergence*
Population 1	x	Population 2		Into Pop. 1	Into Pop. 2	Ne Pop. 1	N e Pop. 2	N a	T _MRCA (kya)
*P. t. ellioti*	x	*P. t.*	*MLE*	1.10	1.15	2,140	3,365	3,002	200,979
(Rainforest)	x	*troglodytes*	95% CI	0.52 - 2.37	0.32 - 2.53	1,748 - 2,696	2,720 - 4,091	222 - 15,294	180,157 - 334,096
*P. t. ellioti*	x	*P. t.*	*MLE*	1.58	0.79	2,633	9,084	7,208	254,553
(Ecotone)	x	*troglodytes*	95% CI	1.03 - 2.34	0.20 - 1.71	1,984 - 3,282	7,549 - 10,961	1,493 - 45,421	202,149 - 328,715
*P. t. ellioti*	x	*P. t. ellioti*	*MLE*	2.49	4.39	2,368	860	5,920	4,219
(Rainforest)	x	(Ecotone)	95% CI	0.62 - 13.73	1.84 - 8.84	1,466 - 3,077	658 - 1,231	4,200 - 12,465	2,298 - 67,636

*Demographic parameters were inferred in IMa [38]. These parameters were scaled assuming an mtDNA mutation rate of 1.64 x 10 ^{– 7} [89], an intermediate microsatellite mutation rate of 7.75 x 10 ^{- 5} [87], and 20-year generation time [90]. Demographic estimates assuming different microsatellite mutation rates are shown in Additional file 11.

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