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.

Evolution of Reproductive Isolation in Allopatric and Sympatric Populations

A. Benedict Soans, David Pimentel and Joyce S. Soans
The American Naturalist
Vol. 108, No. 959 (Jan. - Feb., 1974), pp. 117-124
Stable URL: http://www.jstor.org/stable/2459740
Page Count: 8
  • Read Online (Free)
  • Download ($19.00)
  • 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.
Evolution of Reproductive Isolation in Allopatric and Sympatric Populations
Preview not available

Abstract

Experiments were designed to measure the rate of evolution in sympatric (30% gene flow) and allopatric populations of houseflies under similar types of divergent selection (+ or - geotaxis). Under 5% selective pressure on both sympatric and allopatric populations, both diverged rapidly, with the allopatric populations evolving slightly faster during the 38 generations of the experiment. Incipient reproductive isolation occurred in both sympatric and allopatric population systems. In one test, a greater tendency toward reproductive isolation existed in sympatric populations than in allopatric ones.

Page Thumbnails

  • Thumbnail: Page 
117
    117
  • Thumbnail: Page 
118
    118
  • Thumbnail: Page 
119
    119
  • Thumbnail: Page 
120
    120
  • Thumbnail: Page 
121
    121
  • Thumbnail: Page 
122
    122
  • Thumbnail: Page 
123
    123
  • Thumbnail: Page 
124
    124