Biogeography of a southern hemisphere freshwater fish: how important is marine dispersal?
Mol Ecol
; 9(11): 1815-21, 2000 Nov.
Article
em En
| MEDLINE
| ID: mdl-11091317
Galaxias maculatus is one of the world's most widely distributed freshwater fish. This species has a marine-tolerant juvenile phase, and a geographical range extending through much of the southern hemisphere. We conducted phylogeographic analyses of 163 control region haplotypes of G. maculatus, including samples from New Zealand (five locations), Tasmania (one location) and Chile (one location). A lack of genetic structure among New Zealand samples suggests that marine dispersal facilitates considerable gene flow on an intra-continental scale. The discovery of a Tasmanian-like haplotype in one of 144 New Zealand samples indicates that inter-continental marine dispersal occurs but is insufficient to prevent mitochondrial DNA differentiation among continents. The sister relationship of Tasmanian and New Zealand clades implies that marine dispersal is an important biogeographical mechanism for this species. However, a vicariant role in the divergence of eastern and western Pacific G. maculatus cannot be rejected.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Peixes
Limite:
Animals
País/Região como assunto:
America do sul
/
Chile
/
Oceania
Idioma:
En
Revista:
Mol Ecol
Assunto da revista:
BIOLOGIA MOLECULAR
/
SAUDE AMBIENTAL
Ano de publicação:
2000
Tipo de documento:
Article
País de afiliação:
Nova Zelândia
País de publicação:
Reino Unido