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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Phylogeography and alpha taxonomy of the common dolphin (Delphinus sp.)
Journal of Evolutionary Biology, Volume 19, No. 3, Year 2006
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Description
The resolution of taxonomic classifications for delphinid cetaceans has been problematic, especially for species in the genera Delphinus, Tursiops and Stenella. The frequent lack of correspondence between morphological and genetic differentiation in these species raises questions about the mechanisms responsible for their evolution. In this study we focus on the genus Delphinus, and use molecular markers to address questions about speciation and the evolution of population structure. Delphinus species have a worldwide distribution and show a high degree of morphological variation. Two distinct morphotypes, long-beaked and short-beaked, have been considered different species named D. capensis and D. delphis, respectively. However, genetic differentiation between these two forms has only been demonstrated in the Pacific. We analysed samples from eight different geographical regions, including two morphologically defined long-beaked form populations, and compared these with the eastern North Pacific populations. We found high differentiation among the populations described as long-beaked instead of the expected monophyly, suggesting that these populations may have evolved from independent events converging on the same morphotype. We observed low genetic differentiation among the short-beaked populations across a large geographical scale. We interpret these phylogeographical patterns in the context of life history and population structure in related species. © 2005 European Society for Evolutionary Biology.
Authors & Co-Authors
Natoli, Ada
United Kingdom, Durham
Durham University
Cañadas, Ana Maria
Spain, Madrid
Alnitak
Peddemors, Victor Marten
South Africa, Durban
University of Kwazulu-natal
Aguilar, Álex
Spain, Barcelona
Universitat de Barcelona
Vaquero, Concepción
Spain, Madrid
Universidad Autónoma de Madrid
Fernández-Piqueras, P.
Spain, Madrid
Universidad Autónoma de Madrid
Hoelzel, Alan Rus
United Kingdom, Durham
Durham University
Statistics
Citations: 115
Authors: 7
Affiliations: 5
Identifiers
Doi:
10.1111/j.1420-9101.2005.01033.x
ISSN:
1010061X
e-ISSN:
14209101
Research Areas
Genetics And Genomics
Study Design
Cross Sectional Study