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Antitropicality of Pacific fishes : molecular insights

journal contribution
posted on 2002-10-01, 00:00 authored by C Burridge
Twenty-one molecular genetic studies of thirteen antitropical Pacific fishes are herein reviewed. High dispersal potentials and Plio-Pleistocene transequatorial divergence are suggested for approximately half of the taxa studied, consistent with movement across the tropics during glacial periods. Divergences within two fish groups were mid-Miocene in age, corresponding to a period suggested for vicariant isolation associated with equatorial warming, but high dispersal potentials complicate the interpretation of biogeographic history. Only one study suggested transequatorial divergence older than 20 million years. There is a greater proportion of Pleistocene transequatorial divergences in the East Pacific than the West Pacific, consistent with the suggestion that conditions in the East Pacific are more amenable to the formation of antitropical distributions. Multiple transequatorial divergences have been observed within at least two groups, and instances of cryptic speciation have been identified twice. Areas for future research concern taxa that differ from the majority studied to date with respect to latitudinal distribution, bathymetry, evolutionary age, and dispersal potential. Molecular characters have demonstrated utility for the study of antitropical fishes, but with limitations.

History

Journal

Environmental biology of fishes

Volume

65

Issue

2

Pagination

151 - 164

Publisher

Kluwer Academic

Location

Amsterdam, The Netherlands

ISSN

0378-1909

eISSN

1573-5133

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2002, Kluwer Academic Publishers

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