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.

Energetics, Behavior and the Zoogeography of Anhingas and Double-Crested Cormorants

Willard W. Hennemann, III
Ornis Scandinavica (Scandinavian Journal of Ornithology)
Vol. 16, No. 4 (Dec., 1985), pp. 319-323
Published by: Wiley on behalf of Nordic Society Oikos
DOI: 10.2307/3676697
Stable URL: http://www.jstor.org/stable/3676697
Page Count: 5
  • Read Online (Free)
  • 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.
Energetics, Behavior and the Zoogeography of Anhingas and Double-Crested Cormorants
Preview not available

Abstract

The northernmost limits of the distributions of Anhingas and Double-crested Cormorants in the month of December for the years 1977-1981 were examined. Physiological and ecological explanations for the zoogeography of these species were sought through energy budgets constructed from time budget, energetic (rates of metabolism), and climatological data. Anhingas are geographically restricted by physical factors related to their energetics, such as mean monthly temperature and the availability of insolation. Double-crested Cormorants appear not to be limited by energetic consequences, but by another ecological factor such as the availability of open water.

Page Thumbnails

  • Thumbnail: Page 
319
    319
  • Thumbnail: Page 
320
    320
  • Thumbnail: Page 
321
    321
  • Thumbnail: Page 
322
    322
  • Thumbnail: Page 
323
    323