Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.

Global Phylogeography of the Loggerhead Turtle (Caretta caretta) as Indicated by Mitochondrial DNA Haplotypes

Brian W. Bowen, Naoki Kamezaki, Colin J. Limpus, George R. Hughes, Anne B. Meylan and John C. Avise
Evolution
Vol. 48, No. 6 (Dec., 1994), pp. 1820-1828
DOI: 10.2307/2410511
Stable URL: http://www.jstor.org/stable/2410511
Page Count: 9
  • Read Online (Free)
  • Download ($4.00)
  • Subscribe ($19.50)
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Global Phylogeography of the Loggerhead Turtle (Caretta caretta) as Indicated by Mitochondrial DNA Haplotypes
Preview not available

Abstract

Restriction-site analyses of mitochondrial DNA (mtDNA) from the loggerhead sea turtle (Caretta caretta) reveal substantial phylogeographic structure among major nesting populations in the Atlantic, Indian, and Pacific oceans and the Mediterranean sea. Based on 176 samples from eight nesting populations, most breeding colonies were distinguished from other assayed nesting locations by diagnostic and often fixed restriction-site differences, indicating a strong propensity for natal homing by nesting females. Phylogenetic analyses revealed two distinctive matrilines in the loggerhead turtle that differ by a mean estimated sequence divergence p = 0.009, a value similar in magnitude to the deepest intraspecific mtDNA node (p = 0.007) reported in a global survey of the green sea turtle Chelonia mydas. In contrast to the green turtle, where a fundamental phylogenetic split distinguished turtles in the Atlantic Ocean and the Mediterranean Sea from those in the Indian and Pacific oceans, genotypes representing the two primary loggerhead mtDNA lineages were observed in both Atlantic-Mediterranean and Indian-Pacific samples. We attribute this aspect of phylogeographic structure in Caretta caretta to recent interoceanic gene flow, probably mediated by the ability of this temperate-adapted species to utilize habitats around southern Africa. These results demonstrate how differences in the ecology and geographic ranges of marine turtle species can influence their comparative global population structures.

Page Thumbnails

  • Thumbnail: Page 
1820
    1820
  • Thumbnail: Page 
1821
    1821
  • Thumbnail: Page 
1822
    1822
  • Thumbnail: Page 
1823
    1823
  • Thumbnail: Page 
1824
    1824
  • Thumbnail: Page 
1825
    1825
  • Thumbnail: Page 
1826
    1826
  • Thumbnail: Page 
1827
    1827
  • Thumbnail: Page 
1828
    1828