Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.12/1377
Título: Phylogenetic analysis of peri-mediterranean blennies of the genus Salaria: Molecular insights on the colonization of freshwaters
Autor: Almada, Vítor Carvalho
Robalo, Joana Isabel
Levy, André
Freyhof, J.
Bernardi, Giacomo
Doadrio, Ignacio
Palavras-chave: Salaria fluviatilis
Salaria pavo
Molecular clock
12s rRNA gene
16sRNA gene
Mitochondrial control region
S7 ribosomal protein gene
Data: 2009
Editora: Elsevier
Citação: Molecular Phylogenetics and Evolution, 52, 424-431
Resumo: In this paper, the phylogenetic relationships of the marine blenny Salaria pavo and the freshwater S. fluviatilis and S. economidisi were analyzed using four molecular markers: the mitochondrial 12S rRNA, 16S rRNA, and the control region and the nuclear first intron of the S7 ribosomal protein. The monophyly of Salaria is supported, as well as that of S. pavo and that of all the freshwater members of Salaria. Thus, the present results support a single origin for all freshwater Mediterranean blenniids. Our results reject the placement of the species of Salaria in the genus Lipophrys as proposed in previous studies. Using a molecular clock calibrated with trans-Isthmian geminate blenniid species, the split between the ancestor of the freshwater lineage and the ancestor of S. pavo is tentatively placed in the Middle Miocene (well before the Messinian). The marine S. pavo displays a very low level of intraspecific sequence divergence consistent with a Pleistocene bottleneck. S. fluviatilis is a paraphyletic entity with S. economidisi nested within it. A Moroccan population of S. fluviatilis is more divergent than S. economidisi, both in nuclear and mitochondrial genes. Fish from Israel together with some Turkish samples represent the second oldest split. It is argued that these populations may represent cryptic species. Thus, further studies on the taxonomy of these freshwater blennies are urgently needed.
Peer review: yes
URI: http://hdl.handle.net/10400.12/1377
ISSN: 1055-7903
Aparece nas colecções:UIE-E - Artigos em revistas internacionais

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