Behavioral Ecology and Sociobiology

, Volume 55, Issue 3, pp 236–241 | Cite as

Social status in relation to Sindbis virus infection clearance in greenfinches

Original Article


The ability to resist infections can differ between individuals of different social rank. This study investigates if the clearance of an avian virus infection (Sindbis virus) was related to the social status of greenfinches (Carduelis chloris) and if infected birds would decline in social status. The results showed that virus clearance patterns were related to social status. Within groups of birds with similar plumage color (a social status signal), body mass and age, a bird’s social status could be used to predict virus clearance patterns. Dominant birds had higher virus concentrations early in the infection and lower virus titres during later stages of the infection as compared to birds that were subordinates. The infection had no significant effect on previously established social ranks, and ranks that were established during the infection did not appear to be influenced by a bird’s infection status. In conclusion, this study exemplifies a case where the social rank of an individual was a predictor of the ability to clear a viral infection. The underlying physiological mechanisms of this relationship remain to be further investigated.


Carduelis chloris Greenfinch Sindbis virus Social status Virus clearance patterns 


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Copyright information

© Springer-Verlag 2003

Authors and Affiliations

  1. 1.Evolutionary Biology Center, Department of Population BiologyUppsala University752 36 UppsalaSweden
  2. 2.Department of Ecology and Evolutionary BiologyPrinceton UniversityPrincetonUSA

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