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vol. 165, supplement the american naturalist may 2005 The Evolution of Infidelity in Socially Monogamous Passerines
 

Summary: vol. 165, supplement the american naturalist may 2005
The Evolution of Infidelity in Socially Monogamous Passerines:
The Strength of Direct and Indirect Selection on Extrapair
Copulation Behavior in Females
Go¨ran Arnqvist1,* and Mark Kirkpatrick2,
1. Department of Ecology and Evolution, Animal Ecology,
Evolutionary Biology Centre, University of Uppsala, Norbyva¨gen
18D, SE-752 36 Uppsala, Sweden;
2. Section of Integrative Biology C-0930, University of Texas,
Austin, Texas 78712
abstract: Many studies have been aimed at understanding the
maintenance of female infidelity in socially monogamous birds. Be-
cause engaging in extrapair copulations (EPCs) is believed to be costly
for females, it has been argued that EPC behavior must bring indirect
benefits to females by elevating offspring fitness. We use empirical
data from the literature to assess the relative strength of indirect and
direct selection on female EPC behavior, using quantitative genetic
approximations of selection. This analysis confirmed that there is
generally negative direct selection on EPC behavior caused by de-
pressed paternal investment by social males. In contrast, there was

  

Source: Arnqvist, Göran - Department of Animal Ecology, Uppsala Universitet

 

Collections: Environmental Sciences and Ecology