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http://hdl.handle.net/123456789/94
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| Título: | Relationships of Scincid Lizards (Mabuya spp; Reptilia: Scincidae) from the Cape Verde Islands Based on Mitochondrial and Nuclear DNA Sequences |
| Autores: | Brehm, António
Jesus, José
Pinheiro, M
Harris, D. J |
| Palavras Chave: | Mabuya
Cape Verde
Cytochrome b
Colonization |
| Data de Emissão: | May-2001 |
| Editora: | Molecular Phylogenetics and Evolution |
| Relatório da Série N.º: | 001;6 |
| Resumo: | Partial DNA sequences from two mitochondrial (mt)
and one nuclear gene (cytochrome b, 12S rRNA, and
C-mos) were used to estimate the phylogenetic relationships
among the six extant species of skinks endemic
to the Cape Verde Archipelago. The species
form a monophyletic unit, indicating a single colonization
of the islands, probably from West Africa.
Mabuya vaillanti and M. delalandii are sister taxa, as
indicated by morphological characters. Mabuya fogoensis
and M. stangeri are closely related, but the
former is probably paraphyletic. Mabuya spinalis and
M. salensis are also probably paraphyletic. Within species,
samples from separate islands always form monophyletic
groups. Some colonization events can be hypothesized,
which are in line with the age of the
islands. C-mos variation is concordant with the topology
derived from mtDNA. |
| Descrição: | Studies of among-island variation have been fundamental
in evolutionary theory. Nonvolant tetrapod
groups, such as lizards, have become model organisms
for the study of colonization and dispersal patterns,
especially in the mid-Atlantic islands which have wellknown
geological histories (e.g., Thorpe et al., 1994;
Brown and Pestano, 1998; Carranza et al., 2000). Initial
colonization of these archipelagos has often been
followed by invasion of nearby islands and rapid speciation
(Carranza et al., 2000). Reconstruction of such
events can be assessed with DNA sequence data. Given
the limited range of these island endemic species and
that island populations have a higher risk of extinction (Frankham, 1997), assessment of variation is also critical
for conservation efforts. |
| URI: | http://hdl.handle.net/123456789/94 |
| Aparece nas Coleções: | Publicações em Conferências
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