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.

Blood Parasites, Health, Reproductive Success, and Egg Volume in Female Great Tits Parus major

Reija Dufva
Journal of Avian Biology
Vol. 27, No. 1 (Mar., 1996), pp. 83-87
Published by: Wiley on behalf of Nordic Society Oikos
DOI: 10.2307/3676964
Stable URL: http://www.jstor.org/stable/3676964
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.
Blood Parasites, Health, Reproductive Success, and Egg Volume in Female Great Tits Parus major
Preview not available

Abstract

The effect of different genera of blood parasites on female Great Tits Parus major was studied in central Sweden. Haemoproteus, Leucocytozoon, Hepatozoon, Plasmodium and Trypanosoma were found, but only the last mentioned had any measurable effect on the birds. Female Great Tits infected with Trypanosoma laid smaller eggs, hatched proportionally fewer eggs, and raised nestlings with shorter tarsi and generally worse body condition, compared to females without trypanosomes. However, females with low body mass and short tarsi laid smaller eggs, independent of parasite status. Low body mass was correlated with low levels of haemoglobin, suggesting that parasitic infection, or some other disease, initially had caused the lower body mass. Haematocrit, another variable reflecting health status, was positively correlated with clutch size. However, neither haemoglobin nor haematocrit was related to occurrence of blood parasites.

Page Thumbnails

  • Thumbnail: Page 
83
    83
  • Thumbnail: Page 
84
    84
  • Thumbnail: Page 
85
    85
  • Thumbnail: Page 
86
    86
  • Thumbnail: Page 
87
    87