Dear all,
on behalf of my co-authors, I’d like to announce that
the following paper is now available online:
Molecular taxonomy and population structure of the
rough-toothed dolphin Steno bredanensis (Cetartiodactyla:
Delphinidae).
Silva, Azevedo
AF, Secchi ER, Barbosa LA, Flores PAC, Carvalho RR,
Bisi TL, Lailson-Brito J, Cunha HA.
Zoological Journal of
the Linnean Society
This is the first perspective on the genetic
differentiation of rough-toothed dolphins worldwide.
Abstract:
Several delphinid species have shown genetic
population structure, both between and within ocean basins. We investigated
genetic differentiation in the rough-toothed dolphin, Steno bredanensis, using mitochondrial control region sequences from several localities
worldwide (N = 112). Preliminary analyses indicated high
levels of genetic differentiation between the Atlantic and Pacific/Indian
Oceans, which were further investigated using complete cytochrome b sequences and mitogenomes. Phylogenetic analyses were inconclusive about
the existence of cryptic speciation in the genus Steno.
Notwithstanding this result, analysis of molecular variance and Φ-statistics analyses
revealed strong population differentiation not only between the Atlantic and
Pacific, but also within the Atlantic, where three populations were detected:
Caribbean, southeastern Brazil, and southern Brazil. 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.
Cheers, Haydée
~~~~~~~~~~~~~~~~~~~~
Haydée A. Cunha, PhD
MAQUA - Laboratório de Mamíferos Aquáticos e Bioindicadores (UERJ)
Faculdade de Oceanografia
Universidade do Estado do Rio de Janeiro
Rua São Francisco Xavier, 524 / Sl. 4002-E
Maracanã, Rio de Janeiro - RJ, Brasil
CEP 20.550-013
Tel: +55 (21) 2334-0065 / 99981-8382