title: Evolution of clutch size in birds: adaptive variation in relation to territory quality.
abstract: Reproductive output from enlarged or reduced magpie broods showed that each female generally lays a clutch of optimal size. This size varies considerably between females. Approximately 85 percent of the within-years variation in clutch size was associated with differences between territories. Colonial bird species, lacking individual foraging territories, have a smaller clutch size variation than territorial species.
authors.forename: G
authors.initials: G
authors.lastname: Högstedt