Table 2.

Genetic differentiation by means of exact probability tests with Markov chains (below diagonal) and gene flow estimates (above diagonal) of I. boliviensis population pairs sampled in different Bolivian rivers analyzed for the mitochondrial control region (CR). 1 = Middle Mamoré River population (Porvenir, Bellaunión, Cerrito, mouth of Iruyañez River with Mamoré River), n = 10; 2 = Bolivar population (Mamoré River), n = 3; 3 = El Corte population (Mamoré River), n = 5; 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 = 5; 8 = Tijamuchí River (Mamoré River), n = 2; 9 = Ipurupuru River (Iténez River), n = 14; 10 = Mouth of Ibaré River with Mamoré River (Mamoré River), n = 36. * p < 0.05; ** p < 0.0001, significant heterogeneity, n = sample sizes.

Population	1	2	3	4	5	6	7	8	9	10
1		infinite	10.065	0.560	1.671	36.489	13.648	12.024	1.365	1.312
2	0.713 ± 0.005		Infinite	0.434	0.600	infinite	Infinite	0.000	0.439	infinite
3	0.708 ± 0.004	1.000 ± 0.000		1.417	2.342	infinite	Infinite	32.500	0.953	1.061
4	0.121 ± 0.005	0.093 ± 0.002	0.521 ± 0.006		1.062	0.758	0.221	0.687	0.101	0.060
5	0.115 ± 0.004	0.098 ± 0.003	0.537 ± 0.004	1.000 ± 0.000		2.684	0.288	1.500	0.203	0.119
6	0.332 ± 0.004	0.403 ± 0.002	1.000 ± 0.000	1.000 ± 0.000	1.000 ± 0.000		2.143	1.263	0.457	0.720
7	0.404 ± 0.003	1.000 ± 0.000	0.168 ± 0.003	0.046 ± 0.001 *	0.045 ± 0.002 *	0.108 ± 0.003		0.000	0.362	infinite
8	0.184 ± 0.004	0.103 ± 0.002	0.236 ± 0.003	0.335 ± 0.002	0.329 ± 0.002	0.400 ± 0.006	0.045 ± 0.001 *		infinite	0.199
9	0.005 ± 0.001 *	0.050 ± 0.001 *	0.006 ± 0.001 *	0.008 ± 0.000 *	0.009 ± 0.001 *	0.007 ± 0.001 *	0.010 ± 0.000 *	1.000 ± 0.000		0.392
10	0.008 ± 0.001 *	1.000 ± 0.000	0.048 ± 0.003 *	0.011 ± 0.002 *	0.008 ± 0.001 *	0.036 ± 0.003 *	1.000 ± 0.000	0.005 ± 0.000 *	0.000 ± 0.000 **