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.

Dynamics of the Intestinal Helminth Fauna in Three Species of Ducks

Henry N. Buscher
The Journal of Wildlife Management
Vol. 29, No. 4 (Oct., 1965), pp. 772-781
Published by: Wiley on behalf of the Wildlife Society
DOI: 10.2307/3798553
Stable URL: http://www.jstor.org/stable/3798553
Page Count: 10
  • Download ($42.00)
  • Subscribe ($19.50)
  • Cite this Item
Dynamics of the Intestinal Helminth Fauna in Three Species of Ducks
Preview not available

Abstract

The dynamics of the intestinal helminth fauna of some anatids along a North American migratory route and the factors contributing to it were studied. The alimentary tracts from 500 ducks of three species, the pintail (Anas acuta), the gadwall (Anas strepera), and the shoveler (Spatula clypeata), were collected during the months of June, 1963, through August, 1964. Twenty-seven species of helminths including 6 genera and 17 species of Cestoidea, 6 genera and 7 species of Digenea, 2 species of Nematoda in as many genera, and 1 species of Acanthocephala were found. Helminth species and the degree of their infection varied greatly in different hosts in the same area, in young and adult ducks of the same species, and in ducks during different seasons. The greatest invasion of helminths occurred in young ducks at the breeding area. The intensity of helminth infections decreased greatly during the fall migration; in addition, several species of helminths were lost entirely. Factors influencing the composition and distribution of the helminth fauna include physiological changes in the host corresponding with seasonal migration, age of the host, feeding habits of the host resulting directly from a change in climatic conditions and available food, and the complexity and duration of the parasites' life cycles.

Page Thumbnails

  • Thumbnail: Page 
772
    772
  • Thumbnail: Page 
773
    773
  • Thumbnail: Page 
774
    774
  • Thumbnail: Page 
775
    775
  • Thumbnail: Page 
776
    776
  • Thumbnail: Page 
777
    777
  • Thumbnail: Page 
778
    778
  • Thumbnail: Page 
779
    779
  • Thumbnail: Page 
780
    780
  • Thumbnail: Page 
781
    781