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.

Spatial and Temporal Factors Affecting Coexistence Among Sexual and Clonal Forms of Poeciliopsis

Russell A. Schenck and Robert C. Vrijenhoek
Evolution
Vol. 40, No. 5 (Sep., 1986), pp. 1060-1070
DOI: 10.2307/2408764
Stable URL: http://www.jstor.org/stable/2408764
Page Count: 11
  • 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.
Spatial and Temporal Factors Affecting Coexistence Among Sexual and Clonal Forms of Poeciliopsis
Preview not available

Abstract

We examined spatial and seasonal factors affecting coexistence of closely related sexual and asexual fishes of the genus Poeciliopsis living in two ecologically distinct stream habitats. Stream order and productivity influenced frequencies of these fish, and local habitat patchiness contributed strongly to spatial segregation. The magnitude and direction of local segregation was unaffected by striking seasonal variation in one stream. For the second stream, the relative contributions of local, geographical, and seasonal components of spatial variation were assessed through estimation of variance components. Spatial segregation at the smallest scale accounted for the largest proportion of variance in the distribution of species and clones.

Page Thumbnails

  • Thumbnail: Page 
1060
    1060
  • Thumbnail: Page 
1061
    1061
  • Thumbnail: Page 
1062
    1062
  • Thumbnail: Page 
1063
    1063
  • Thumbnail: Page 
1064
    1064
  • Thumbnail: Page 
1065
    1065
  • Thumbnail: Page 
1066
    1066
  • Thumbnail: Page 
1067
    1067
  • Thumbnail: Page 
1068
    1068
  • Thumbnail: Page 
1069
    1069
  • Thumbnail: Page 
1070
    1070