Table 7.

F_ST statistics (below main diagonal) and gene flow (upper main diagonal) among I. boliviensis population pairs (eight populations) sampled in Bolivian rivers for 10 nuclear microsatellite markers. 1 = Middle Mamoré River population (Porvenir, Bellaunión, Cerrito, mouth of Iruyañez River with Mamoré River), n = 12; 2 = Bolivar population (Mamoré River), n = 3; 3 = El Corte population (Mamoré River), n = 6; 4 = El Azul population (Iténez River), n = 2; 5 = San Martín River population (Iténez River), n = 2; 6 = Securé River (Mamoré River), n = 3; 7 = Upper Ibaré River (Mamoré River), n = 3; 8 = Mouth of Ibaré River with Mamoré River (Mamoré River), n = 30; * p < 0.05; ** p < 0.001; n = sample sizes.

Population Pairs	1	2	3	4	5	6	7	8
1		infinite	4.61	2.05	4.32	6.13	4.38	3.53
2	0.000		56.17	0.90	0.56	0.97	0.90	2.64
3	0.051	0.004		1.24	0.88	1.88	2.05	1.44
4	0.109	0.218 **	0.168 *		0.73	0.71	0.78	0.82
5	0.055	0.310 **	0.221 **	0.254 **		1.57	4.03	0.85
6	0.039	0.205 **	0.117 *	0.260 **	0.137 *		infinite	1.46
7	0.054	0.217 **	0.109 *	0.243 **	0.058	0.000		2.92
8	0.066	0.086	0.148 *	0.233 **	0.228 **	0.147 *	0.079