Open AccessMolecular taxonomy and population structure of the rough‐toothed dolphin S teno bredanensis ( C etartiodactyla: D elphinidae)
Author(s) -
Silva Dayse M. P.,
Azevedo Alexandre F.,
Secchi Eduardo R.,
Barbosa Lupércio A.,
Flores Paulo A. C.,
Carvalho Rafael R.,
Bisi Tatiana L.,
LailsonBrito José,
Cunha Haydée A.
Publication year - 2015
Publication title -
zoological journal of the linnean society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.148
H-Index - 83
eISSN - 1096-3642
pISSN - 0024-4082
DOI - 10.1111/zoj.12301
Subject(s) - biology , zoology , genetic structure , cytochrome b , phylogeography , mtdna control region , evolutionary biology , phylogenetic tree , population , taxonomy (biology) , species complex , ecology , genetic variation , genetics , demography , haplotype , gene , genotype , sociology
Several delphinid species have shown genetic population structure, both between and within ocean basins. We investigated genetic differentiation in the rough‐toothed dolphin, S teno bredanensis , using mitochondrial control region sequences from several localities worldwide ( N = 112). Preliminary analyses indicated high levels of genetic differentiation between the A tlantic and P acific/ I ndian O ceans, which were further investigated using complete cytochrome b sequences and mitogenomes. Phylogenetic analyses were inconclusive about the existence of cryptic speciation in the genus S teno . Notwithstanding this result, analysis of molecular variance and Φ‐statistics analyses revealed strong population differentiation not only between the A tlantic and P acific, but also within the A tlantic, where three populations were detected: C aribbean, southeastern B razil, and southern B razil. We propose that these populations be considered management units for conservation purposes. Our results provide the first perspective on the worldwide genetic differentiation of S . bredanensis . © 2015 The Linnean Society of London