AMAZON RIVER DOLPHIN: HIGH PHYLOPATRY DUE TO RESTRICTED DISPERSION AT LARGE AND SHORT DISTANCES - Biology, Evolution and Conservation of River Dolphins Within South America and Asia - page 106

the control region, but presenting no haplotype sharing between both regions. The haplotypic
diversity is 0.479 ± 0.072 and the nucleotide diversity is 0.00042, a low value suggesting a
short period of separation.

Table 1. Absolute haplotype frequencies, and gene (Nei 1978) and nucleotide (Tamura &
Nei 1993) diversities for the Brazilian subpopulations using the control region data.
Population

Haplo types Nucleotide

diversity ()

Gene
diversity ( h) n BrA BrB BrC BrD BrE BrF

0.7455
+/- 0.0978

0.0024
+/- 0.0019

Mamirauá 11 3 0 5 1 0 2

0.4167
+/- 0.1907

0.0031
+/- 0.0024

Tefé 9 0 7 1 0 1 0

CO3 CO3

CO2 CO2

BA4 BA4

CO4 CO4

BA1 BA1

BA6 BA6

BA2 BA2

BA7 BA7

BA3 BA3

CA2 CA2

CO1 CO1

F F

CO5 CO5

C C

D D

CA1 CA1

A A

E E

B B

Figure 2. Median joining network (Bandelt et al., 1999) constructed with control region mtDNA
haplotypes for I. geoffrensis individuals from four populations, including two subpopulations from
Brazil. Circle areas are proportional to haplotype frequencies and branch lengths are proportional to
mutation events. Haplotypes are from the Brazilian Amazon (BR, A-F), Bolivian Amazon (BA),
Colombian Orinoco (CO) and Colombian Amazon (CA) populations. BA1 = BA5 (Banguera-
Hinestroza et al., 2002).